diff --git a/@postman/src/main.cpp b/@postman/src/main.cpp
index b6a8efe..8b06993 100644
--- a/@postman/src/main.cpp
+++ b/@postman/src/main.cpp
@@ -14,19 +14,12 @@
 //   this module will be an esp-now node in a group.
 //       like, a bird in a group of birds.
 //
-//   esp-now @ esp8266 DO support broadcast address (FF:FF:FF:FF:FF:FF)
-//       w/ NONOS-SDK of espressif
-//   and you can enable that w/ Platformio, applying some special build flags.
-//       --> https://github.com/esp8266/Arduino/issues/6174#issuecomment-509115454
-//           (yet, w/ Arduino, this is not available yet.)
-//
-//   so, at first, we will simply/stably go w/o broadcasting.
-//   and, if broadcast is really needed we can activate (@Platformio)
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
 //
 
 
 // then, let is save a value in EEPROM (object with memory)
-// no broadcast for now. if needed we can achieve that too.
 
 
 
@@ -66,12 +59,6 @@
 
 //============<parameters>============
 //
-#define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-// #define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -109,7 +96,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -215,60 +201,6 @@ void blink() {
 }
 Task blink_task(0, TASK_FOREVER, &blink, &runner, true); // -> ENABLED, at start-up.
 
-//task #1 : regular post collection
-#if defined(HAVE_CLIENT)
-void collect_post() {
-  //
-  //postman (serial comm.)
-  static bool insync = false;
-  if (insync == false) {
-    while (Serial.available() > 0) {
-      // search the last byte
-      char last = Serial.read();
-      // expectable last of the messages
-      if (last == ']' || last == '}') {
-        insync = true;
-      }
-    }
-  } else {
-    //
-    if (Serial.available() > 0) {
-      //
-      char type = Serial.peek();
-      //
-      if (type == '[') {
-        //expecting a Note message.
-        uint8_t frm_size = sizeof(Note) + 2;
-        //
-        if (Serial.available() >= frm_size) {
-          //
-          uint8_t frm[frm_size];
-          //
-          Serial.readBytes(frm, frm_size);
-          char first = frm[0];
-          char last = frm[frm_size - 1];
-          if (first == '[' && last == ']') {
-            //
-            //good. ==> ok, post it.
-            //
-            //pseudo-broadcast using peer-list!
-            //
-            esp_now_send(NULL, frm, frm_size);
-            //
-            MONITORING_SERIAL.write(frm, frm_size);
-            MONITORING_SERIAL.print(" ==(esp_now_send/0)==> ");
-            //
-          } else {
-            insync = false; //error!
-          }
-        }
-      }
-    }
-  }
-}
-Task collect_post_task(1, TASK_FOREVER, &collect_post, &runner, true); // by default, ENABLED
-#endif
-
 //
 void setup() {
 
@@ -301,16 +233,6 @@ void setup() {
 #if defined(HAVE_CLIENT_I2C)
   Serial.println("-      ======== 'HAVE_CLIENT_I2C' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -331,43 +253,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
diff --git a/crickets/src/main.cpp b/crickets/src/main.cpp
index c6b07bd..b65a199 100755
--- a/crickets/src/main.cpp
+++ b/crickets/src/main.cpp
@@ -9,6 +9,12 @@
 //
 // 2021 02 15
 //
+//   this module will be an esp-now node in a group.
+//       like, a bird in a group of birds.
+//
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
+//
 
 //==========<configurations>===========
 //
@@ -32,39 +38,17 @@
 #elif 0
 #define SERIAL_SWAP
 #define HAVE_CLIENT
-// (3) sampler client
-#elif 0
-#define SERIAL_SWAP
-#define HAVE_CLIENT
-#define DISABLE_AP
 //
 #endif
 //
 //==========</preset>==========
 
-//============<list of reserved keys>============
-#define CRICKET_A_KEY 120 // geared (esp8266)
-#define CRICKET_E_KEY 121 // geared (esp8266)
-#define CRICKET_I_KEY 122 // geared (esp8266)
-#define CRICKET_O_KEY 123 // geared (esp8266) // servo pin is different (D7)
-#define CRICKET_U_KEY 124
-#define CRICKET_W_KEY 125
-#define CRICKET_Y_KEY 126
-#define CRICKET_N_KEY 127 // fishing-fly (esp32)
-//============</list of reserved keys>===========
-
 //============<identity key>============
 #define ID_KEY 126
 //============</identity key>===========
 
 //============<parameters>============
 //
-#define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-// #define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -99,7 +83,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -145,12 +128,10 @@ void hello() {
   memcpy(frm + 1, (uint8_t *) &hello, sizeof(Hello));
   frm[frm_size - 1] = '}';
   //
-  //pseudo-broadcast using peer-list!
-  //
-  esp_now_send(AddressBook("root").list[0].mac, frm, frm_size);
+  esp_now_send(NULL, frm, frm_size); // just broadcast.
   //
   MONITORING_SERIAL.write(frm, frm_size);
-  MONITORING_SERIAL.println(" ==(esp_now_send/\"root\")==> ");
+  MONITORING_SERIAL.println(" ==(esp_now_send/BROADCAST)==> ");
   //
   if (hello_delay > 0) {
     if (hello_delay < 100) hello_delay = 100;
@@ -258,16 +239,6 @@ void setup() {
 #if defined(DISABLE_AP)
   Serial.println("-      ======== 'DISABLE_AP' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -288,43 +259,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
diff --git a/gonggong/src/main.cpp b/gonggong/src/main.cpp
index a27b114..6087009 100644
--- a/gonggong/src/main.cpp
+++ b/gonggong/src/main.cpp
@@ -9,6 +9,12 @@
 //
 // 2021 02 15
 //
+//   this module will be an esp-now node in a group.
+//       like, a bird in a group of birds.
+//
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
+//
 
 //==========<configurations>===========
 //
@@ -54,12 +60,6 @@
 
 //============<parameters>============
 //
-#define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-// #define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -94,7 +94,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -213,6 +212,33 @@ Task head_release_task(0, TASK_ONCE, &head_release);
 // Task head_release_task(0, TASK_ONCE, &head_release);
 //*-*-*-*-*-*-*-*-*-*-*-*-*
 
+//
+extern Task hello_task;
+static int hello_delay = 0;
+void hello() {
+  //
+  Hello hello = {
+    ID_KEY
+  };
+  //
+  uint8_t frm_size = sizeof(Hello) + 2;
+  uint8_t frm[frm_size];
+  frm[0] = '{';
+  memcpy(frm + 1, (uint8_t *) &hello, sizeof(Hello));
+  frm[frm_size - 1] = '}';
+  //
+  esp_now_send(NULL, frm, frm_size); // just broadcast.
+  //
+  MONITORING_SERIAL.write(frm, frm_size);
+  MONITORING_SERIAL.println(" ==(esp_now_send/BROADCAST)==> ");
+  //
+  if (hello_delay > 0) {
+    if (hello_delay < 100) hello_delay = 100;
+    hello_task.restartDelayed(hello_delay);
+  }
+}
+Task hello_task(0, TASK_ONCE, &hello);
+
 //task #0 : blink led
 extern Task blink_task;
 void blink() {
@@ -241,70 +267,6 @@ void blink() {
 }
 Task blink_task(0, TASK_FOREVER, &blink, &runner, true); // -> ENABLED, at start-up.
 
-//task #1 : regular post collection
-#if defined(HAVE_CLIENT)
-void collect_post() {
-  //
-  //postman (serial comm.)
-  static bool insync = false;
-  if (insync == false) {
-    while (Serial.available() > 0) {
-      // search the last byte
-      char last = Serial.read();
-      // expectable last of the messages
-      if (last == ']' || last == '}') {
-        insync = true;
-      }
-    }
-  } else {
-    //
-    if (Serial.available() > 0) {
-      //
-      char type = Serial.peek();
-      //
-      if (type == '[') {
-        //expecting a Note message.
-        uint8_t frm_size = sizeof(Note) + 2;
-        //
-        if (Serial.available() >= frm_size) {
-          //
-          uint8_t frm[frm_size];
-          //
-          Serial.readBytes(frm, frm_size);
-          char first = frm[0];
-          char last = frm[frm_size - 1];
-          if (first == '[' && last == ']') {
-            //
-            //good. ==> ok, post it.
-            //
-            //pseudo-broadcast using addressbook!
-            //
-            for (uint32_t i = 0; i < members.list.size(); i++) {
-              esp_now_send(members.list[i].mac, frm, frm_size);
-              //
-              MONITORING_SERIAL.write(frm, frm_size);
-              MONITORING_SERIAL.print(" ==(esp_now_send)==> ");
-              //
-              MONITORING_SERIAL.print(members.list[i].mac[0], HEX);
-              for (int j = 1; j < 6; j++) {
-                MONITORING_SERIAL.print(":");
-                MONITORING_SERIAL.print(members.list[i].mac[j], HEX);
-              }
-              MONITORING_SERIAL.print(" ==> " + members.list[i].name);
-              //
-            }
-            //
-          } else {
-            insync = false; //error!
-          }
-        }
-      }
-    }
-  }
-}
-Task collect_post_task(1, TASK_FOREVER, &collect_post, &runner, true); // by default, ENABLED
-#endif
-
 // on 'Note'
 void onNoteHandler(Note & n) {
   //
@@ -393,16 +355,6 @@ void setup() {
 #if defined(DISABLE_AP)
   Serial.println("-      ======== 'DISABLE_AP' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -423,43 +375,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -482,6 +404,7 @@ void setup() {
   randomSeed(analogRead(0));
 
   //tasks
+  runner.addTask(hello_task);
   runner.addTask(ring_side_task);
   runner.addTask(ring_side_move_task);
   runner.addTask(side_release_task);
diff --git a/postman/src/main.cpp b/postman/src/main.cpp
index 0027795..0a23ce3 100644
--- a/postman/src/main.cpp
+++ b/postman/src/main.cpp
@@ -14,19 +14,12 @@
 //   this module will be an esp-now node in a group.
 //       like, a bird in a group of birds.
 //
-//   esp-now @ esp8266 DO support broadcast address (FF:FF:FF:FF:FF:FF)
-//       w/ NONOS-SDK of espressif
-//   and you can enable that w/ Platformio, applying some special build flags.
-//       --> https://github.com/esp8266/Arduino/issues/6174#issuecomment-509115454
-//           (yet, w/ Arduino, this is not available yet.)
-//
-//   so, at first, we will simply/stably go w/o broadcasting.
-//   and, if broadcast is really needed we can activate (@Platformio)
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
 //
 
 
 // then, let is save a value in EEPROM (object with memory)
-// no broadcast for now. if needed we can achieve that too.
 
 
 
@@ -59,12 +52,6 @@
 
 //============<parameters>============
 //
-// #define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-#define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -99,7 +86,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -252,16 +238,6 @@ void setup() {
 #if defined(DISABLE_AP)
   Serial.println("-      ======== 'DISABLE_AP' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -282,43 +258,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
diff --git a/puredata/piano_access_mesh_x_2.pd b/puredata/piano_access_mesh_x_2.pd
index 04eb647..d924f81 100644
--- a/puredata/piano_access_mesh_x_2.pd
+++ b/puredata/piano_access_mesh_x_2.pd
@@ -1,4 +1,4 @@
-#N canvas 542 326 804 465 10;
+#N canvas 238 195 804 465 10;
 #X obj 397 140 print CTRL;
 #X obj 397 82 r CTRL;
 #X obj 397 103 spigot;
@@ -10,16 +10,16 @@
 #X obj 125 292 packOSC;
 #X obj 125 267 r OSC2;
 #X obj 317 103 spigot;
-#X obj 366 88 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0
+#X obj 366 88 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
 1;
 #X obj 317 82 r OSC2;
 #X obj 317 140 print OSC2;
-#N canvas 196 89 718 806 crickets 0;
+#N canvas 0 89 1440 811 crickets 1;
 #X obj 129 363 pack f f;
 #X obj 175 185 tgl 20 0 empty empty 120 17 7 0 10 -257985 -1 -1 0 1
 ;
 #X obj 91 289 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 4032 1;
 #X floatatom 139 311 5 0 0 0 - - -;
 #X obj 1077 528 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1
 0 1;
@@ -94,7 +94,7 @@
 #X obj 114 701 t b a;
 #X obj 32 248 f;
 #X obj 32 269 + 1;
-#X obj 32 186 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1 0
+#X obj 32 186 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1 1
 1;
 #X floatatom 31 366 5 0 0 0 - - -;
 #X floatatom 31 407 5 0 0 0 - - -;
@@ -190,7 +190,7 @@
 #X obj 591 183 tgl 20 0 empty empty 122 17 7 0 10 -257985 -1 -1 0 1
 ;
 #X obj 507 287 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 4193 1;
 #X floatatom 555 309 5 0 0 0 - - -;
 #X obj 545 405 s CTRL;
 #X obj 448 246 f;
@@ -265,10 +265,10 @@
 #X obj 40 668 + 1;
 #X obj 39 629 metro 1000;
 #X obj 752 357 pack f f;
-#X obj 798 179 tgl 20 0 empty empty 123 17 7 0 10 -257985 -1 -1 0 1
+#X obj 798 179 tgl 20 0 empty empty 123 17 7 0 10 -257985 -1 -1 1 1
 ;
 #X obj 714 283 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 3064 1;
 #X floatatom 762 305 5 0 0 0 - - -;
 #X obj 752 401 s CTRL;
 #X obj 655 242 f;
@@ -286,12 +286,12 @@
 #X obj 1006 174 tgl 20 0 empty empty 124 17 7 0 10 -257985 -1 -1 0
 1;
 #X obj 922 278 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 2258 1;
 #X floatatom 970 300 5 0 0 0 - - -;
 #X obj 960 396 s CTRL;
 #X obj 863 237 f;
 #X obj 863 258 + 1;
-#X obj 863 175 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1 0
+#X obj 863 175 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1 1
 1;
 #X floatatom 862 355 5 0 0 0 - - -;
 #X floatatom 862 396 5 0 0 0 - - -;
@@ -307,13 +307,13 @@
 #X obj 1216 171 tgl 20 0 empty empty 125 17 7 0 10 -257985 -1 -1 0
 1;
 #X obj 1132 275 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 9434 1;
 #X floatatom 1180 297 5 0 0 0 - - -;
 #X obj 1170 393 s CTRL;
 #X obj 1073 234 f;
 #X obj 1073 255 + 1;
 #X obj 1073 172 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1
-0 1;
+1 1;
 #X floatatom 1072 352 5 0 0 0 - - -;
 #X floatatom 1072 393 5 0 0 0 - - -;
 #X floatatom 1073 297 5 0 0 0 - - -;
@@ -344,13 +344,13 @@
 #X obj 1364 392 tgl 20 0 empty empty 125 17 7 0 10 -257985 -1 -1 0
 1;
 #X obj 1280 496 hsl 128 15 0 300 0 0 empty empty empty -2 -8 0 10 -262144
--1 -1 0 1;
+-1 -1 12700 1;
 #X floatatom 1328 518 5 0 0 0 - - -;
 #X obj 1318 614 s CTRL;
 #X obj 1221 455 f;
 #X obj 1221 476 + 1;
 #X obj 1221 393 tgl 20 0 empty empty empty 17 7 0 10 -262130 -1 -1
-0 1;
+1 1;
 #X floatatom 1220 573 5 0 0 0 - - -;
 #X floatatom 1220 614 5 0 0 0 - - -;
 #X floatatom 1221 518 5 0 0 0 - - -;
@@ -387,10 +387,8 @@
 #X obj 538 764 * 300;
 #X obj 1221 497 mod 50;
 #X text 701 184 3 찌;
-#X obj 447 384 * 200;
 #X text 491 187 2 찌;
 #X text 283 189 1 찌;
-#X obj 31 386 * 100;
 #X text 907 181 가방진;
 #X text 1121 177 노란이 1;
 #X text 1271 395 노란이 2;
@@ -526,12 +524,10 @@
 #X msg 364 971 154 50 1;
 #X obj 364 932 metro 500;
 #X msg 49 1081 1002 0 1;
-#X obj 1072 372 * 800;
 #X obj 1220 593 * 1200;
 #X obj 721 802 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
 -1 -1;
 #X obj 638 788 * 50;
-#X obj 641 618 metro 50;
 #X obj 1520 978 s CTRL;
 #X obj 1494 723 f;
 #X obj 1494 744 + 1;
@@ -558,6 +554,10 @@
 #X text 1865 1168 >>>;
 #X obj 539 615 metro 1000;
 #X floatatom 587 842 5 0 0 0 - - -;
+#X obj 31 386 * 400;
+#X obj 641 618 metro 500;
+#X obj 447 384 * 800;
+#X obj 1092 372 * 600;
 #X connect 0 0 72 0;
 #X connect 1 0 0 1;
 #X connect 2 0 0 0;
@@ -591,7 +591,7 @@
 #X connect 39 0 38 1;
 #X connect 39 0 119 0;
 #X connect 40 0 44 0;
-#X connect 41 0 228 0;
+#X connect 41 0 367 0;
 #X connect 42 0 2 0;
 #X connect 43 0 87 0;
 #X connect 44 0 38 0;
@@ -608,7 +608,7 @@
 #X connect 64 0 63 1;
 #X connect 64 0 70 0;
 #X connect 65 0 69 0;
-#X connect 66 0 343 0;
+#X connect 66 0 341 0;
 #X connect 67 0 59 0;
 #X connect 68 0 62 0;
 #X connect 69 0 63 0;
@@ -623,7 +623,7 @@
 #X connect 79 0 78 1;
 #X connect 79 0 120 0;
 #X connect 80 0 84 0;
-#X connect 81 0 225 0;
+#X connect 81 0 369 0;
 #X connect 82 0 75 0;
 #X connect 83 0 86 0;
 #X connect 84 0 78 0;
@@ -637,7 +637,7 @@
 #X connect 96 0 97 0;
 #X connect 97 0 96 1;
 #X connect 97 0 106 0;
-#X connect 98 0 243 0;
+#X connect 98 0 241 0;
 #X connect 99 0 173 0;
 #X connect 100 0 93 0;
 #X connect 101 0 107 0;
@@ -653,7 +653,7 @@
 #X connect 111 0 112 0;
 #X connect 112 0 111 1;
 #X connect 112 0 154 0;
-#X connect 113 0 369 0;
+#X connect 113 0 365 0;
 #X connect 114 0 118 0;
 #X connect 115 0 153 0;
 #X connect 116 0 114 0;
@@ -704,7 +704,7 @@
 #X connect 162 0 161 1;
 #X connect 162 0 168 0;
 #X connect 163 0 167 0;
-#X connect 164 0 347 0;
+#X connect 164 0 370 0;
 #X connect 165 0 158 0;
 #X connect 166 0 169 0;
 #X connect 167 0 161 0;
@@ -738,7 +738,7 @@
 #X connect 194 0 193 1;
 #X connect 194 0 223 0;
 #X connect 195 0 199 0;
-#X connect 196 0 348 0;
+#X connect 196 0 345 0;
 #X connect 197 0 190 0;
 #X connect 198 0 200 0;
 #X connect 199 0 193 0;
@@ -747,10 +747,10 @@
 #X connect 203 0 204 0;
 #X connect 204 0 203 1;
 #X connect 204 0 215 0;
-#X connect 205 0 351 0;
+#X connect 205 0 368 0;
 #X connect 206 0 210 0;
 #X connect 207 0 214 0;
-#X connect 208 0 350 0;
+#X connect 208 0 347 0;
 #X connect 209 0 208 0;
 #X connect 210 1 211 0;
 #X connect 211 0 212 0;
@@ -764,137 +764,137 @@
 #X connect 221 0 184 0;
 #X connect 222 0 116 0;
 #X connect 223 0 198 0;
-#X connect 225 0 82 0;
-#X connect 228 0 42 0;
-#X connect 234 0 235 0;
-#X connect 235 0 234 1;
-#X connect 235 0 239 0;
-#X connect 236 0 240 0;
-#X connect 237 0 238 0;
-#X connect 239 0 237 0;
-#X connect 240 0 234 0;
-#X connect 241 0 242 0;
-#X connect 242 0 233 0;
-#X connect 243 0 96 0;
-#X connect 245 0 246 0;
-#X connect 246 0 244 0;
-#X connect 248 0 258 0;
+#X connect 232 0 233 0;
+#X connect 233 0 232 1;
+#X connect 233 0 237 0;
+#X connect 234 0 238 0;
+#X connect 235 0 236 0;
+#X connect 237 0 235 0;
+#X connect 238 0 232 0;
+#X connect 239 0 240 0;
+#X connect 240 0 231 0;
+#X connect 241 0 96 0;
+#X connect 243 0 244 0;
+#X connect 244 0 242 0;
+#X connect 246 0 256 0;
+#X connect 247 0 248 0;
+#X connect 248 0 249 0;
 #X connect 249 0 250 0;
+#X connect 249 0 247 1;
 #X connect 250 0 251 0;
-#X connect 251 0 252 0;
-#X connect 251 0 249 1;
-#X connect 252 0 253 0;
-#X connect 253 0 295 0;
-#X connect 253 1 296 0;
-#X connect 256 0 254 0;
-#X connect 257 0 255 0;
-#X connect 258 0 260 0;
-#X connect 259 0 262 0;
-#X connect 260 0 346 0;
-#X connect 260 1 249 0;
-#X connect 260 2 257 0;
-#X connect 260 3 259 0;
-#X connect 261 0 259 0;
-#X connect 268 0 338 0;
-#X connect 269 0 270 0;
-#X connect 270 0 337 0;
-#X connect 271 0 339 0;
-#X connect 274 0 272 0;
-#X connect 275 0 273 0;
-#X connect 276 0 278 0;
-#X connect 277 0 322 0;
-#X connect 277 1 269 0;
-#X connect 277 2 275 0;
-#X connect 277 3 276 0;
-#X connect 283 0 276 0;
-#X connect 285 0 284 0;
-#X connect 287 0 290 1;
-#X connect 288 0 286 0;
-#X connect 288 0 285 0;
+#X connect 251 0 293 0;
+#X connect 251 1 294 0;
+#X connect 254 0 252 0;
+#X connect 255 0 253 0;
+#X connect 256 0 258 0;
+#X connect 257 0 260 0;
+#X connect 258 0 344 0;
+#X connect 258 1 247 0;
+#X connect 258 2 255 0;
+#X connect 258 3 257 0;
+#X connect 259 0 257 0;
+#X connect 266 0 336 0;
+#X connect 267 0 268 0;
+#X connect 268 0 335 0;
+#X connect 269 0 337 0;
+#X connect 272 0 270 0;
+#X connect 273 0 271 0;
+#X connect 274 0 276 0;
+#X connect 275 0 320 0;
+#X connect 275 1 267 0;
+#X connect 275 2 273 0;
+#X connect 275 3 274 0;
+#X connect 281 0 274 0;
+#X connect 283 0 282 0;
+#X connect 285 0 288 1;
+#X connect 286 0 284 0;
+#X connect 286 0 283 0;
+#X connect 288 0 287 0;
+#X connect 289 0 286 0;
 #X connect 290 0 289 0;
 #X connect 291 0 288 0;
-#X connect 292 0 291 0;
-#X connect 293 0 290 0;
-#X connect 294 0 257 0;
-#X connect 295 0 256 0;
-#X connect 296 0 256 0;
+#X connect 292 0 255 0;
+#X connect 293 0 254 0;
+#X connect 294 0 254 0;
+#X connect 296 0 298 0;
+#X connect 297 0 310 0;
+#X connect 298 0 299 0;
 #X connect 298 0 300 0;
-#X connect 299 0 312 0;
-#X connect 300 0 301 0;
-#X connect 300 0 302 0;
-#X connect 301 0 300 1;
-#X connect 302 0 317 0;
-#X connect 303 0 304 0;
-#X connect 303 0 311 0;
-#X connect 304 0 303 1;
-#X connect 305 0 318 0;
-#X connect 306 0 307 0;
-#X connect 307 0 292 0;
-#X connect 309 0 319 0;
-#X connect 309 1 308 1;
-#X connect 310 0 309 0;
-#X connect 311 0 306 0;
-#X connect 312 0 298 0;
-#X connect 312 1 313 0;
-#X connect 313 0 300 0;
-#X connect 314 0 315 0;
-#X connect 315 0 346 0;
-#X connect 315 1 256 0;
-#X connect 315 2 259 0;
-#X connect 315 3 257 0;
-#X connect 316 0 303 0;
-#X connect 317 0 310 0;
-#X connect 318 0 303 0;
-#X connect 319 0 308 0;
-#X connect 322 0 267 0;
+#X connect 299 0 298 1;
+#X connect 300 0 315 0;
+#X connect 301 0 302 0;
+#X connect 301 0 309 0;
+#X connect 302 0 301 1;
+#X connect 303 0 316 0;
+#X connect 304 0 305 0;
+#X connect 305 0 290 0;
+#X connect 307 0 317 0;
+#X connect 307 1 306 1;
+#X connect 308 0 307 0;
+#X connect 309 0 304 0;
+#X connect 310 0 296 0;
+#X connect 310 1 311 0;
+#X connect 311 0 298 0;
+#X connect 312 0 313 0;
+#X connect 313 0 344 0;
+#X connect 313 1 254 0;
+#X connect 313 2 257 0;
+#X connect 313 3 255 0;
+#X connect 314 0 301 0;
+#X connect 315 0 308 0;
+#X connect 316 0 301 0;
+#X connect 317 0 306 0;
+#X connect 320 0 265 0;
+#X connect 321 0 322 0;
 #X connect 323 0 324 0;
+#X connect 324 0 320 0;
+#X connect 324 1 272 0;
+#X connect 324 2 274 0;
+#X connect 324 3 273 0;
 #X connect 325 0 326 0;
-#X connect 326 0 322 0;
-#X connect 326 1 274 0;
-#X connect 326 2 276 0;
-#X connect 326 3 275 0;
+#X connect 326 0 327 0;
 #X connect 327 0 328 0;
-#X connect 328 0 329 0;
-#X connect 329 0 330 0;
-#X connect 329 1 331 0;
-#X connect 330 0 332 0;
-#X connect 330 0 334 0;
-#X connect 336 0 345 0;
-#X connect 337 0 271 0;
-#X connect 337 0 269 1;
-#X connect 338 0 277 0;
-#X connect 339 0 340 0;
-#X connect 339 1 342 0;
-#X connect 340 0 274 0;
-#X connect 341 0 274 0;
-#X connect 342 0 274 0;
-#X connect 343 0 67 0;
-#X connect 344 0 335 0;
-#X connect 345 0 344 0;
-#X connect 346 0 247 0;
-#X connect 347 0 165 0;
-#X connect 348 0 197 0;
-#X connect 349 0 211 0;
-#X connect 350 0 206 0;
-#X connect 351 0 203 0;
-#X connect 353 0 354 0;
-#X connect 354 0 353 1;
-#X connect 354 0 362 0;
-#X connect 355 0 367 0;
-#X connect 356 0 360 0;
-#X connect 357 0 365 0;
-#X connect 358 0 356 0;
-#X connect 359 0 363 0;
-#X connect 360 1 361 0;
-#X connect 361 0 366 0;
-#X connect 362 0 357 0;
-#X connect 363 0 358 0;
-#X connect 365 0 359 0;
-#X connect 366 0 352 0;
-#X connect 367 0 353 0;
-#X connect 369 0 111 0;
-#X connect 369 0 370 0;
-#X connect 370 0 50 0;
+#X connect 327 1 329 0;
+#X connect 328 0 330 0;
+#X connect 328 0 332 0;
+#X connect 334 0 343 0;
+#X connect 335 0 269 0;
+#X connect 335 0 267 1;
+#X connect 336 0 275 0;
+#X connect 337 0 338 0;
+#X connect 337 1 340 0;
+#X connect 338 0 272 0;
+#X connect 339 0 272 0;
+#X connect 340 0 272 0;
+#X connect 341 0 67 0;
+#X connect 342 0 333 0;
+#X connect 343 0 342 0;
+#X connect 344 0 245 0;
+#X connect 345 0 197 0;
+#X connect 346 0 211 0;
+#X connect 347 0 206 0;
+#X connect 349 0 350 0;
+#X connect 350 0 349 1;
+#X connect 350 0 358 0;
+#X connect 351 0 363 0;
+#X connect 352 0 356 0;
+#X connect 353 0 361 0;
+#X connect 354 0 352 0;
+#X connect 355 0 359 0;
+#X connect 356 1 357 0;
+#X connect 357 0 362 0;
+#X connect 358 0 353 0;
+#X connect 359 0 354 0;
+#X connect 361 0 355 0;
+#X connect 362 0 348 0;
+#X connect 363 0 349 0;
+#X connect 365 0 111 0;
+#X connect 365 0 366 0;
+#X connect 366 0 50 0;
+#X connect 367 0 42 0;
+#X connect 368 0 203 0;
+#X connect 369 0 82 0;
+#X connect 370 0 165 0;
 #X restore 261 206 pd crickets nanokontrol2;
 #X text 576 69 /pitch /velocity /onoff;
 #X obj 530 69 r CTRL;
@@ -964,7 +964,7 @@ pollintervall 1 \, verbose 1;
 #X obj 125 392 unpackOSC;
 #X obj 125 415 routeOSC /hello;
 #X obj 252 404 s HELLO;
-#N canvas 133 398 1214 393 roundly 0;
+#N canvas 133 398 1214 393 roundly 1;
 #X floatatom 925 227 5 0 0 0 - - -;
 #X obj 925 249 s PS;
 #X msg 354 139 \$1 5000;
@@ -987,7 +987,7 @@ pollintervall 1 \, verbose 1;
 #X obj 253 209 s CTRL;
 #X floatatom 253 99 5 0 0 0 target_pos - -;
 #X obj 97 31 hsl 1000 15 -50000 50000 0 0 empty empty empty -2 -8 0
-10 -260097 -262144 -1 49950 1;
+10 -260097 -262144 -1 25950 1;
 #X obj 97 51 hsl 1000 15 -50000 50000 0 0 empty empty empty -2 -8 0
 10 -13381 -262144 -1 49950 1;
 #X obj 253 121 t b a;
@@ -1111,7 +1111,7 @@ pollintervall 1 \, verbose 1;
 #X restore 102 45 pd bluetooth-keyboard;
 #X text 1 2 <<<;
 #X text 401 2 >>>;
-#N canvas 429 89 696 411 OSC-keyboard-samplers 1;
+#N canvas 699 114 696 411 OSC-keyboard-samplers 1;
 #X obj 27 148 o.io.slipserial;
 #X msg 56 97 devices;
 #X msg 143 102 close;
@@ -1121,7 +1121,7 @@ pollintervall 1 \, verbose 1;
 #X obj 591 82 print NOTE;
 #X obj 511 82 print OSC;
 #X obj 511 55 spigot;
-#X obj 560 40 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
+#X obj 560 40 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0
 1;
 #X msg 134 60 devicename /dev/tty.usbmodem48710501 \, baud 57600 \,
 pollintervall 1 \, verbose 1;
@@ -1146,7 +1146,7 @@ pollintervall 1 \, verbose 1;
 #X text 193 296 BIG;
 #X text 31 296 SMALL;
 #X obj 69 297 hradio 15 1 0 8 empty empty vol._override 0 -8 0 10 -257985
--1 -1 3;
+-1 -1 4;
 #X obj 69 320 tabread \$0-volume-list;
 #N canvas 817 360 501 420 volume-list 0;
 #X msg 146 359 \; \$1-volume-list 0 0 10 25 50 127 180 255 500;
@@ -1251,7 +1251,7 @@ pollintervall 1 \, verbose 1;
 #X restore 189 204 pd buildOSC;
 #X floatatom 243 240 5 0 0 3 r:0-vol #0-vol -;
 #X obj 286 232 nbx 5 25 -1e+37 1e+37 0 0 empty empty volume-now 0 -12
-0 20 -262130 -159808 -159808 50 256;
+0 20 -262130 -159808 -159808 127 256;
 #X msg 225 109 devicename /dev/ttyACM0 \, baud 57600 \, pollintervall
 1 \, verbose 1;
 #X obj 541 212 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0
diff --git a/roundly/src/main.cpp b/roundly/src/main.cpp
index 231e994..f8f4458 100644
--- a/roundly/src/main.cpp
+++ b/roundly/src/main.cpp
@@ -9,6 +9,12 @@
 //
 // 2021 02 15
 //
+//   this module will be an esp-now node in a group.
+//       like, a bird in a group of birds.
+//
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
+//
 
 //==========<configurations>===========
 //
@@ -32,39 +38,17 @@
 #elif 0
 #define SERIAL_SWAP
 #define HAVE_CLIENT
-// (3) sampler client
-#elif 0
-#define SERIAL_SWAP
-#define HAVE_CLIENT
-#define DISABLE_AP
 //
 #endif
 //
 //==========</preset>==========
 
-//============<list of reserved keys>============
-#define ROUNDLY_A_KEY 2000 // A-E-I-O-U-W-Y-N (up to 8 roundlys) - KEY 200 ~ 207
-#define ROUNDLY_E_KEY 2001
-#define ROUNDLY_I_KEY 2002
-#define ROUNDLY_O_KEY 2003
-#define ROUNDLY_U_KEY 2004
-#define ROUNDLY_W_KEY 2005
-#define ROUNDLY_Y_KEY 2006
-#define ROUNDLY_N_KEY 2007
-//============</list of reserved keys>===========
-
 //============<identity key>============
-#define ID_KEY ROUNDLY_E_KEY
+#define ID_KEY 2000
 //============</identity key>===========
 
 //============<parameters>============
 //
-#define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-// #define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -99,7 +83,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -186,8 +169,6 @@ void hello() {
   Hello hello = {
     ID_KEY,
     stepper.currentPosition(),
-    stepper.distanceToGo(),
-    stepper.distanceToGo(),
     stepper.distanceToGo()
   };
   //
@@ -197,12 +178,10 @@ void hello() {
   memcpy(frm + 1, (uint8_t *) &hello, sizeof(Hello));
   frm[frm_size - 1] = '}';
   //
-  //pseudo-broadcast using peer-list!
-  //
-  esp_now_send(AddressBook("root").list[0].mac, frm, frm_size);
+  esp_now_send(NULL, frm, frm_size); // just broadcast.
   //
   MONITORING_SERIAL.write(frm, frm_size);
-  MONITORING_SERIAL.println(" ==(esp_now_send/\"root\")==> ");
+  MONITORING_SERIAL.println(" ==(esp_now_send/BROADCAST)==> ");
   //
   if (hello_delay > 0) {
     if (hello_delay < 100) hello_delay = 100;
@@ -316,16 +295,6 @@ void setup() {
 #if defined(DISABLE_AP)
   Serial.println("-      ======== 'DISABLE_AP' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -346,43 +315,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -414,9 +353,9 @@ void setup() {
 #endif
 
   //tasks
+  runner.addTask(hello_task);
   runner.addTask(stepping_task);
   runner.addTask(rest_task);
-  runner.addTask(hello_task);
 
   rest_task.restartDelayed(500);
 }
diff --git a/taak/src/main.cpp b/taak/src/main.cpp
index 3485713..846881b 100644
--- a/taak/src/main.cpp
+++ b/taak/src/main.cpp
@@ -9,6 +9,12 @@
 //
 // 2021 02 15
 //
+//   this module will be an esp-now node in a group.
+//       like, a bird in a group of birds.
+//
+//   esp-now @ esp8266 w/ broadcast address (FF:FF:FF:FF:FF:FF)
+//       always broadcasting. everyone is 'talkative'.
+//
 
 //==========<configurations>===========
 //
@@ -42,29 +48,12 @@
 //
 //==========</preset>==========
 
-//============<list of reserved keys>============
-#define TAAK_A_KEY 150 //solenoid
-#define TAAK_E_KEY 151 //valve
-#define TAAK_I_KEY 152
-#define TAAK_O_KEY 153
-#define TAAK_U_KEY 154
-#define TAAK_W_KEY 155
-#define TAAK_Y_KEY 156
-#define TAAK_N_KEY 157
-//============</list of reserved keys>===========
-
 //============<identity key>============
 #define ID_KEY 151
 //============</identity key>===========
 
 //============<parameters>============
 //
-#define MY_BOOK ("root")
-// #define MY_BOOK ("friend")
-// #define MY_BOOK ("sampler")
-//
-#define PEER_COUNT_MAX (20)
-//
 #define LED_PERIOD (11111)
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
@@ -99,7 +88,6 @@
 
 //post & addresses
 #include "../../post.h"
-AddressLibrary library;
 
 //espnow
 #include <ESP8266WiFi.h>
@@ -123,6 +111,33 @@ void taak_off() {
 Task taak_off_task(0, TASK_ONCE, &taak_off);
 //*-*-*-*-*-*-*-*-*-*-*-*-*
 
+//
+extern Task hello_task;
+static int hello_delay = 0;
+void hello() {
+  //
+  Hello hello = {
+    ID_KEY
+  };
+  //
+  uint8_t frm_size = sizeof(Hello) + 2;
+  uint8_t frm[frm_size];
+  frm[0] = '{';
+  memcpy(frm + 1, (uint8_t *) &hello, sizeof(Hello));
+  frm[frm_size - 1] = '}';
+  //
+  esp_now_send(NULL, frm, frm_size); // just broadcast.
+  //
+  MONITORING_SERIAL.write(frm, frm_size);
+  MONITORING_SERIAL.println(" ==(esp_now_send/BROADCAST)==> ");
+  //
+  if (hello_delay > 0) {
+    if (hello_delay < 100) hello_delay = 100;
+    hello_task.restartDelayed(hello_delay);
+  }
+}
+Task hello_task(0, TASK_ONCE, &hello);
+
 //task #0 : blink led
 extern Task blink_task;
 void blink() {
@@ -151,70 +166,6 @@ void blink() {
 }
 Task blink_task(0, TASK_FOREVER, &blink, &runner, true); // -> ENABLED, at start-up.
 
-//task #1 : regular post collection
-#if defined(HAVE_CLIENT)
-void collect_post() {
-  //
-  //postman (serial comm.)
-  static bool insync = false;
-  if (insync == false) {
-    while (Serial.available() > 0) {
-      // search the last byte
-      char last = Serial.read();
-      // expectable last of the messages
-      if (last == ']' || last == '}') {
-        insync = true;
-      }
-    }
-  } else {
-    //
-    if (Serial.available() > 0) {
-      //
-      char type = Serial.peek();
-      //
-      if (type == '[') {
-        //expecting a Note message.
-        uint8_t frm_size = sizeof(Note) + 2;
-        //
-        if (Serial.available() >= frm_size) {
-          //
-          uint8_t frm[frm_size];
-          //
-          Serial.readBytes(frm, frm_size);
-          char first = frm[0];
-          char last = frm[frm_size - 1];
-          if (first == '[' && last == ']') {
-            //
-            //good. ==> ok, post it.
-            //
-            //pseudo-broadcast using addressbook!
-            //
-            for (uint32_t i = 0; i < members.list.size(); i++) {
-              esp_now_send(members.list[i].mac, frm, frm_size);
-              //
-              MONITORING_SERIAL.write(frm, frm_size);
-              MONITORING_SERIAL.print(" ==(esp_now_send)==> ");
-              //
-              MONITORING_SERIAL.print(members.list[i].mac[0], HEX);
-              for (int j = 1; j < 6; j++) {
-                MONITORING_SERIAL.print(":");
-                MONITORING_SERIAL.print(members.list[i].mac[j], HEX);
-              }
-              MONITORING_SERIAL.print(" ==> " + members.list[i].name);
-              //
-            }
-            //
-          } else {
-            insync = false; //error!
-          }
-        }
-      }
-    }
-  }
-}
-Task collect_post_task(1, TASK_FOREVER, &collect_post, &runner, true); // by default, ENABLED
-#endif
-
 // on 'Note'
 void onNoteHandler(Note & n) {
   //is it for me?
@@ -294,16 +245,6 @@ void setup() {
 #if defined(DISABLE_AP)
   Serial.println("-      ======== 'DISABLE_AP' ========");
 #endif
-  Serial.println("-");
-  Serial.println("- * address library >>>");
-  for (uint32_t j = 0; j < library.lib.size(); j++) {
-    Serial.println("-");
-    Serial.println("-    * (" + String(j + 1) + ") - \"" + library.lib[j].title + "\" >>>");
-    Serial.println("-");
-    for (uint32_t i = 0; i < library.lib[j].list.size(); i++) {
-      Serial.println("-          " + library.lib[j].list[i].to_string());
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -324,43 +265,13 @@ void setup() {
   esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
+  //
+  Serial.println("-");
+  Serial.println("- we will broadcast everything. ==> add only the 'broadcast peer' (FF:FF:FF:FF:FF:FF).");
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_add_peer(broadcastmac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 
   //
-  AddressBook* members = library.getBookByTitle(MY_BOOK);
-  Serial.println("! registering peers in the book titled: \"" + String(MY_BOOK) + "\"");
-
-  //
-  if (members == NULL) {
-    //oh, no such book!
-    Serial.println("---- :( oh, no such book! ===> " + String(MY_BOOK));
-    Serial.println("        .... no peer will be registered. come back with different 'title' !");
-  } else {
-    Serial.println("---- :) oki-doki, found it!");
-    Serial.println();
-    //
-    for (uint32_t i = 0; i < members->list.size(); i++) {
-      if (i >= PEER_COUNT_MAX) {
-        Serial.println("(!) @@@@ Hey, no more free-slot. @@@@ ==> " + members->list[i].to_string() + " ==> IGNORED :(");
-      } else {
-        //some decoration?
-        Serial.print("" + String((i + 1)%10) + "_ ");
-        for (uint32_t k = 0; k < i; k++) Serial.print(" ");
-        //
-        Serial.println("~~>> 'esp_now_add_peer' with ... " + members->list[i].to_string());
-        esp_now_add_peer(members->list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
-        //
-        // int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
-        //     - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
-        //
-        // "Channel does not affect any function, but only stores the channel information
-        // for the application layer. The value is defined by the application layer. For
-        // example, 0 means that the channel is not defined; 1 ~ 14 mean valid
-        // channels; all the rest values can be assigned functions that are specified
-        // by the application layer."
-        //     - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
-      }
-    }
-  }
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");
   Serial.println();
@@ -383,6 +294,7 @@ void setup() {
   pinMode(D6, OUTPUT);
 
   //tasks
+  runner.addTask(hello_task);
   runner.addTask(taak_on_task);
   runner.addTask(taak_off_task);
 }