updates for simpler communication

+ peer book listing (debug)
+ no addressbook/peer list -> all go broadcast!
+ wifi_channel == 1 for later 
(https://github.com/espressif/arduino-esp32/issues/878#issuecomment-578885352)

@bell/src/main.cpp

@@ -51,7 +51,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

@postman/src/main.cpp

@@ -25,7 +25,6 @@
 #define MY_GROUP_ID   (10000)
 #define MY_ID         (MY_GROUP_ID + 1)
 #define MY_SIGN       ("@POSTMAN|@SAMPLER")
-//
 #define ADDRESSBOOK_TITLE ("broadcast only")
 //
 //============</identities>============
@@ -51,6 +50,10 @@
 // 'HAVE_CLIENT_I2C'
 // --> i have a client w/ I2C i/f. enable the I2C client task.
 //
+// 'ADDRESSBOOK_TITLE'
+// --> peer list limited max. 20.
+//     so, we might use different address books for each node to cover a network of more than 20 nodes.
+//
 //==========</list-of-configurations>==========
 //
 #define HAVE_CLIENT_I2C
@@ -64,7 +67,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //
@@ -370,32 +373,14 @@ void setup() {
   esp_now_register_send_cb(onDataSent);
   esp_now_register_recv_cb(onDataReceive);
 
-  //fetch & read addressbook
-  String addressbook_title = ADDRESSBOOK_TITLE;
-// #if defined(ADDRESSBOOK_TITLE_CLI)
-//   addressbook_title = ADDRESSBOOK_TITLE_CLI;
-// #endif
-//
-// NOTE: there is a way to give a define value here like:
-//   export PLATFORMIO_SRC_BUILD_FLAGS="'-DADDRESSBOOK_TITLE_CLI=\"broadcast only\"'" && pio run
-// but, everytime i change this, whole arduino framework + libraries rebuild.
-// PLATFORMIO_SRC_BUILD_FLAGS supposed to work only to src/ but strange.
-// this takes up too much time, not really haptic. later, investigate the issues.
-//
-  AddressBook * book = lib.getBookByTitle(addressbook_title);
+  AddressBook * book = lib.getBookByTitle(ADDRESSBOOK_TITLE);
   if (book == NULL) {
-    Serial.println("- ! wrong book !! :" + addressbook_title); while(1);
-  } else {
-    Serial.println("- ! reading book ....");
-    Serial.println("    -----------------");
-    Serial.println("    { " + addressbook_title + " }");
-    Serial.println("    -----------------");
-    Serial.println();
+    Serial.println("- ! wrong book !! : \"" + String(ADDRESSBOOK_TITLE) + "\""); while(1);
   }
   for (int idx = 0; idx < book->list.size(); idx++) {
     Serial.println("- ! (esp_now_add_peer) ==> add a '" + book->list[idx].name + "'.");
 #if defined(ESP32)
-    esp_now_peer_info_t peerInfo;
+    esp_now_peer_info_t peerInfo = {};
     memcpy(peerInfo.peer_addr, book->list[idx].mac, 6);
     peerInfo.channel = 0;
     peerInfo.encrypt = false;
@@ -404,6 +389,8 @@ void setup() {
     esp_now_add_peer(book->list[idx].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0);
 #endif
   }
+  // (DEBUG) fetch full peer list
+  { PeerLister a; a.print(); }
   //
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");

audioooo/src/main.cpp

@@ -57,7 +57,7 @@
 //
 #define SCREEN_PERIOD (200) //200ms = 5hz
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //
@@ -264,23 +264,10 @@ void repeat() {
   esp_now_send(broadcastmac, frm, frm_size);
 
   // (DEBUG) fetch full peer list
-  esp_now_peer_num_t num;
-  esp_now_get_peer_num(&num);
-  esp_now_peer_info_t peer_info;
-  bool first = true;
-  for (uint8_t ii = 0; ii < num.total_num; ii++) {
-    esp_now_fetch_peer(first, &peer_info);
-    if (first) first = false;
-    MONITORING_SERIAL.printf("# peer: %02X:%02X:%02X:%02X:%02X:%02X\n",
-                             peer_info.peer_addr[0],
-                             peer_info.peer_addr[1],
-                             peer_info.peer_addr[2],
-                             peer_info.peer_addr[3],
-                             peer_info.peer_addr[4],
-                             peer_info.peer_addr[5]);
-  }
+  { PeerLister a; a.print(); }
+
   //
-  MONITORING_SERIAL.print("repeat! ==> ");
+  MONITORING_SERIAL.print("\nrepeat! ==> ");
   MONITORING_SERIAL.println(note_now.to_string());
 }
 Task repeat_task(0, TASK_ONCE, &repeat, &runner, false);
@@ -561,6 +548,9 @@ void setup() {
   // esp_now_add_peer(&peerInfo);
 
   AddressBook * book = lib.getBookByTitle(ADDRESSBOOK_TITLE);
+  if (book == NULL) {
+    Serial.println("- ! wrong book !! : \"" + String(ADDRESSBOOK_TITLE) + "\""); while(1);
+  }
   for (int idx = 0; idx < book->list.size(); idx++) {
     Serial.println("- ! (esp_now_add_peer) ==> add a '" + book->list[idx].name + "'.");
     esp_now_peer_info_t peerInfo = {};
@@ -569,6 +559,8 @@ void setup() {
     peerInfo.encrypt = false;
     esp_now_add_peer(&peerInfo);
   }
+  // (DEBUG) fetch full peer list
+  { PeerLister a; a.print(); }
   //
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");

broadcast/src/main.cpp

@@ -18,7 +18,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 //============</parameters>===========
 

crickets/src/main.cpp

@@ -51,7 +51,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

gong1/src/main.cpp

@@ -57,7 +57,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

gonggong/src/main.cpp

@@ -57,7 +57,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

osc8266/src/main.cpp

@@ -57,7 +57,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

p/src/main.cpp

@@ -39,7 +39,7 @@
 //
 #define SCREEN_PERIOD (200) //200ms = 5hz
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

post.h

@@ -8,6 +8,51 @@
 //esp-now
 #include <vector>
 
+// (DEBUG) fetch full peer list
+#if defined(ARDUINO_ARCH_ESP32) // for esp32 API
+#include <esp_now.h>
+struct PeerLister {
+  void print() {
+    Serial.printf("\n# (DEBUG) peer list (NOTE: a broadcast peer won't be listed properly)\n");
+    esp_now_peer_num_t num;
+    esp_now_get_peer_num(&num);
+    esp_now_peer_info_t peer_info = {};
+    bool first = true;
+    for (uint8_t ii = 0; ii < num.total_num; ii++) {
+      esp_now_fetch_peer(first, &peer_info);
+      if (first) first = false;
+      Serial.printf("# peer: %02X:%02X:%02X:%02X:%02X:%02X\n",
+                               peer_info.peer_addr[0],
+                               peer_info.peer_addr[1],
+                               peer_info.peer_addr[2],
+                               peer_info.peer_addr[3],
+                               peer_info.peer_addr[4],
+                               peer_info.peer_addr[5]);
+    }
+  }
+};
+#elif defined(ARDUINO_ARCH_ESP8266) // for esp8266 API
+#include <espnow.h>
+struct PeerLister {
+  void print() {
+    Serial.printf("\n# (DEBUG) peer list\n");
+    bool first = true;
+    uint8_t * peer_addr = NULL;
+    while((peer_addr = esp_now_fetch_peer(first)) != NULL) {
+      first = false;
+      Serial.printf("# peer: %02X:%02X:%02X:%02X:%02X:%02X\n",
+                               peer_addr[0],
+                               peer_addr[1],
+                               peer_addr[2],
+                               peer_addr[3],
+                               peer_addr[4],
+                               peer_addr[5]);
+    }
+  }
+};
+#endif
+
+
 // 'address'
 struct Address {
   String name;

postman/src/main.cpp

@@ -54,7 +54,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

q/src/main.cpp

@@ -56,7 +56,7 @@
 //
 #define SCREEN_PERIOD (200) //200ms = 5hz
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //
@@ -262,21 +262,7 @@ void screen() {
       esp_now_send(broadcastmac, frm, frm_size);
 
       // (DEBUG) fetch full peer list
-      esp_now_peer_num_t num;
-      esp_now_get_peer_num(&num);
-      esp_now_peer_info_t peer_info;
-      bool first = true;
-      for (uint8_t ii = 0; ii < num.total_num; ii++) {
-        esp_now_fetch_peer(first, &peer_info);
-        if (first) first = false;
-        MONITORING_SERIAL.printf("# peer: %02X:%02X:%02X:%02X:%02X:%02X\n",
-                                 peer_info.peer_addr[0],
-                                 peer_info.peer_addr[1],
-                                 peer_info.peer_addr[2],
-                                 peer_info.peer_addr[3],
-                                 peer_info.peer_addr[4],
-                                 peer_info.peer_addr[5]);
-      }
+      { PeerLister a; a.print(); }
 
       //+ play start for myself
       sample_now = song_request;
@@ -457,21 +443,8 @@ void repeat() {
   esp_now_send(broadcastmac, frm, frm_size);
 
   // (DEBUG) fetch full peer list
-  esp_now_peer_num_t num;
-  esp_now_get_peer_num(&num);
-  esp_now_peer_info_t peer_info;
-  bool first = true;
-  for (uint8_t ii = 0; ii < num.total_num; ii++) {
-    esp_now_fetch_peer(first, &peer_info);
-    if (first) first = false;
-    MONITORING_SERIAL.printf("# peer: %02X:%02X:%02X:%02X:%02X:%02X\n",
-                             peer_info.peer_addr[0],
-                             peer_info.peer_addr[1],
-                             peer_info.peer_addr[2],
-                             peer_info.peer_addr[3],
-                             peer_info.peer_addr[4],
-                             peer_info.peer_addr[5]);
-  }
+  { PeerLister a; a.print(); }
+
   //
   MONITORING_SERIAL.print("repeat! ==> ");
   MONITORING_SERIAL.println(note_now.to_string());
@@ -504,7 +477,12 @@ void hello() {
   memcpy(frm + 1, (uint8_t *) &hello, sizeof(Hello));
   frm[frm_size - 1] = '}';
   //
-  esp_now_send(NULL, frm, frm_size); // to all peers in the list.
+  // strange but following didn't work as expected. (instead, i have to send one-by-one.)
+  // esp_now_send(NULL, frm, frm_size); // to all peers in the list.
+
+  // so, forget about peer list -> just pick a broadcast peer to be sent.
+  uint8_t broadcastmac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+  esp_now_send(broadcastmac, frm, frm_size);
   //
   // MONITORING_SERIAL.write(frm, frm_size);
   // MONITORING_SERIAL.println(" ==(esp_now_send/0)==> ");
@@ -760,6 +738,9 @@ void setup() {
   // esp_now_add_peer(&peerInfo);
 
   AddressBook * book = lib.getBookByTitle(ADDRESSBOOK_TITLE);
+  if (book == NULL) {
+    Serial.println("- ! wrong book !! : \"" + String(ADDRESSBOOK_TITLE) + "\""); while(1);
+  }
   for (int idx = 0; idx < book->list.size(); idx++) {
     Serial.println("- ! (esp_now_add_peer) ==> add a '" + book->list[idx].name + "'.");
     esp_now_peer_info_t peerInfo = {};
@@ -768,6 +749,8 @@ void setup() {
     peerInfo.encrypt = false;
     esp_now_add_peer(&peerInfo);
   }
+  // (DEBUG) fetch full peer list
+  { PeerLister a; a.print(); }
   //
   Serial.println("-");
   Serial.println("\".-.-.-. :)\"");

roller/src/main.cpp

@@ -51,7 +51,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

roller2/src/main.cpp

@@ -51,7 +51,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

roundly/src/main.cpp

@@ -51,7 +51,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

taak/src/main.cpp

@@ -52,7 +52,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //

taak3/src/main.cpp

@@ -58,7 +58,7 @@
 #define LED_ONTIME (1)
 #define LED_GAPTIME (222)
 //
-#define WIFI_CHANNEL 5
+#define WIFI_CHANNEL 1
 //
 // 'MONITORING_SERIAL'
 //