added @thunder

@postman/src/main.cpp

@@ -22,8 +22,8 @@
 
 //============<identities>============
 //
-#define MY_GROUP_ID       (10000)
+#define MY_GROUP_ID       (898989)
-#define MY_ID             (MY_GROUP_ID + 5)
+#define MY_ID             (MY_GROUP_ID + 0)
 #define MY_SIGN           ("@POSTMAN|@SAMPLER")
 #define ADDRESSBOOK_TITLE ("broadcast only")
 //
@@ -252,6 +252,12 @@ void onDataReceive(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
       //      .substring(7, 8);
 
       char letter_outro[POST_BUFF_LEN] = "................................";
+      if (note.pitch < 0) note.pitch = 0;
+      if (note.pitch >= 1000) note.pitch = 999;
+      if (note.velocity < 0) note.velocity = 0;
+      if (note.velocity >= 1000) note.velocity = 999;
+      if (note.onoff < 0) note.onoff = 0;
+      if (note.onoff >= 10) note.onoff = 9;
       sprintf(letter_outro, "[%03d%03d%01d.......................]",
               (int32_t)note.pitch,
               (int32_t)note.velocity,

@thunder/platformio.ini

@@ -0,0 +1,28 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[platformio]
+default_envs = teensy35
+
+[common]
+lib_deps =
+  721 ; TaskScheduler
+
+[env:teensy35]
+platform = teensy
+board = teensy35
+framework = arduino
+lib_deps = ${common.lib_deps}
+
+[env:teensy36]
+platform = teensy@3.6.0
+board = teensy36
+framework = arduino
+lib_deps = ${common.lib_deps}

@thunder/src/main.cpp

@@ -0,0 +1,204 @@
+//
+// wirelessly connected cloud (based on ESP-NOW, a kind of LPWAN?)
+//
+
+//
+// Conversation about the ROOT @ SEMA storage, Seoul
+//
+
+//
+// 2021 02 15
+//
+// (part-3) teensy35 : 'client:sampler' (mesh post --> play sounds)
+//
+
+#include <Arduino.h>
+
+//teensy audio
+#include <Audio.h>
+#include <Wire.h>
+// #include <SPI.h>
+// #include <SD.h>
+#include <SerialFlash.h>
+
+// GUItool: begin automatically generated code
+AudioSynthWaveformSine sine1;            //xy=297,249
+AudioAmplifier amp1;                     //xy=476,249
+AudioOutputAnalogStereo dacs1;           //xy=663,247
+AudioConnection patchCord1(sine1, amp1);
+AudioConnection patchCord2(amp1, 0, dacs1, 0);
+AudioConnection patchCord3(amp1, 0, dacs1, 1);
+// GUItool: end automatically generated code
+
+//task
+#include <TaskScheduler.h>
+Scheduler runner;
+
+//on 'rrrrr'
+extern Task rrrrr_task;
+
+// make a rrrrr noise sequence
+bool rrrrr_new = false;
+void rrrrr() {
+  static int rrrrr_freq = 5;
+  static int rrrrr_amp = 100;
+  static int rrrrr_count = 0;
+  //
+  Serial.println("rrrrr");
+
+  if (rrrrr_new == true) {
+    Serial.println("rrrrr new");
+
+    rrrrr_new = false;
+    rrrrr_count = 0;
+  }
+  switch(random(5))
+  {
+  case 0:
+    rrrrr_freq = 5;
+    rrrrr_amp = 2000;
+    break;
+  case 1:
+    rrrrr_freq = 8;
+    rrrrr_amp = 1500;
+    break;
+  case 2:
+    rrrrr_freq = 10;
+    rrrrr_amp = 1500;
+    break;
+  case 3:
+    rrrrr_freq = 15;
+    rrrrr_amp = 1200;
+    break;
+  case 4:
+    rrrrr_freq = 20;
+    rrrrr_amp = 350;
+    break;
+  default:
+    ;
+  }
+  //
+  if (rrrrr_count == 24) {
+    sine1.frequency(0);
+    amp1.gain(1);
+  }
+  else {
+    sine1.frequency(rrrrr_freq);
+    amp1.gain(rrrrr_amp);
+    rrrrr_task.restartDelayed(random(100, 1000));
+  }
+  rrrrr_count++;
+  Serial.println(rrrrr_count);
+}
+Task rrrrr_task(0, TASK_ONCE, &rrrrr, &runner); // this will automatically retrigger itself 24 times with randomized intervals.
+
+//i2c
+#include <Wire.h>
+#include "../../post.h"
+void receiveEvent(int numBytes) {
+  //numBytes : how many bytes received(==available)
+  static char letter_intro[POST_BUFF_LEN] = "................................";
+
+  // Serial.println("[i2c] on receive!");
+  int nb = Wire.readBytes(letter_intro, POST_LENGTH);
+
+  if (POST_LENGTH == nb) {
+
+    //convert to String
+    String msg = String(letter_intro);
+    Serial.println(msg);
+
+    //parse letter string.
+
+    // letter frame ( '[' + 30 bytes + ']' )
+    //    : [123456789012345678901234567890]
+
+    // 'MIDI' letter frame
+    //    : [123456789012345678901234567890]
+    //    : [KKKVVVG.......................]
+    //    : KKK - Key
+    //      .substring(1, 4);
+    //    : VVV - Velocity (volume/amp.)
+    //      .substring(4, 7);
+    //    : G - Gate (note on/off)
+    //      .substring(7, 8);
+
+    String str_key = msg.substring(1, 4);
+    String str_velocity = msg.substring(4, 7);
+    String str_gate = msg.substring(7, 8);
+    // Serial.println(str_key);
+    // Serial.println(str_velocity);
+    // Serial.println(str_gate);
+
+    //
+    int key = str_key.toInt();           // pitch: 0 ~ 999
+    //
+    int velocity = str_velocity.toInt(); // amp: 0 ~ 999
+    //
+    int gate = str_gate.toInt();         // gate: 0 ~ 9
+
+    //on 'rrrrr'
+    if (gate == 2) {
+      rrrrr_new = true;
+      rrrrr_task.restart();
+    }
+
+    //on 'single note'
+    else if (gate == 1) {
+      float amp_gain = (float)velocity / 500.0; // amp: 0 ~ 2.0
+      float sine_freq = key;
+      //
+      sine1.frequency(sine_freq);
+      amp1.gain(amp_gain);
+    }
+
+    //on 'stop all note'
+    else if (gate == 0) {
+      sine1.frequency(0);
+      amp1.gain(0);
+      //
+      rrrrr_task.disable();
+    }
+  }
+}
+
+void setup() {
+
+  //serial monitor
+  Serial.begin(115200);
+  //
+  delay(50);
+  // <-- strange? but, this was needed !!
+  // w/o ==> get killed by watchdog.. :(
+  //
+  // while (!Serial) {}
+  //  --> enable this.. to use Serial. otherwise, very jerky/unstable..
+  //  --> and disable this.. if there is no Serial connection! otherwise, brd won't start.
+
+  //i2c
+  Wire.begin(I2C_ADDR);
+  Wire.onReceive(receiveEvent);
+  // DISABLED.. due to bi-directional I2C hardship. ==> use UART.
+  // Wire.onRequest(requestEvent);
+
+  //audio
+  AudioMemory(20);
+
+  //
+  sine1.frequency(0);
+  sine1.amplitude(1.0);
+
+  //
+  amp1.gain(1.0);
+
+  //led
+  pinMode(13, OUTPUT);
+  digitalWrite(13, LOW); // LOW: OFF
+
+  //
+  Serial.println("[setup] done.");
+}
+
+void loop() {
+  runner.execute();
+}