317 lines
8.3 KiB
C++
317 lines
8.3 KiB
C++
//
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// wirelessly connected cloud (based on ESP-NOW, a kind of LPWAN?)
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//
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//
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// Conversation about the ROOT @ SEMA warehouses, Seoul
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//
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//
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// 2021 02 15
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//
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// (part-1) esp8266 : 'postman' (the esp-now network nodes)
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//
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// this module will be an esp-now node in a group.
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// like, a bird in a group of birds.
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//
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// esp-now @ esp8266 DO support broadcast address (FF:FF:FF:FF:FF:FF)
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// w/ NONOS-SDK of espressif
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// and you can enable that w/ Platformio, applying some special build flags.
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// --> https://github.com/esp8266/Arduino/issues/6174#issuecomment-509115454
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// (yet, w/ Arduino, this is not available yet.)
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//
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// so, at first, we will simply/stably go w/o broadcasting.
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// and, if broadcast is really needed we can activate (@Platformio)
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//
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// then, let is save a value in EEPROM (object with memory)
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// no broadcast for now. if needed we can achieve that too.
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//==========<configurations>===========
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//
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// 'HAVE_CLIENT'
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// --> i have a client. enable the client task.
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//
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// 'SERIAL_SWAP'
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// --> UART pin swapped.
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// you want this, when you want a bi-directional comm. to external client boards (e.g. teensy).
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//
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// 'DISABLE_AP'
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// --> (questioning)...
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//
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//==========</configurations>==========
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//==========<preset>===========
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//
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// (1) standalone
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#if 0
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// (2) osc client (the ROOT)
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#elif 1
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#define SERIAL_SWAP
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#define HAVE_CLIENT
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// (3) sampler client
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#elif 0
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#define SERIAL_SWAP
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#define HAVE_CLIENT
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#define DISABLE_AP
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//
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#endif
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//
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//==========</preset>==========
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//============<parameters>============
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//
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#define LED_PERIOD (11111)
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#define LED_ONTIME (1)
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#define LED_GAPTIME (222)
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//
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#define WIFI_CHANNEL 5
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//
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// 'MONITORING_SERIAL'
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//
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// --> sometimes, the 'Serial' is in use (for example, 'osc' node)
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// then, use 'Serial1' - D4/GPIO2/TDX1 @ nodemcu (this is TX only.)
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//
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// --> otherwise, MONITORING_SERIAL == Serial.
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//
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#if defined(SERIAL_SWAP)
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#define MONITORING_SERIAL (Serial1)
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#else
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#define MONITORING_SERIAL (Serial)
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#endif
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//
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//============</parameters>===========
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//============<board-specifics>============
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#if defined(ARDUINO_FEATHER_ESP32) // featheresp32
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#define LED_PIN 13
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#else
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#define LED_PIN 2
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#endif
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//============</board-specifics>===========
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//arduino
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#include <Arduino.h>
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//post & addresses
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#include "../../post.h"
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AddressBook members;
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//espnow
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#include <ESP8266WiFi.h>
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#include <espnow.h>
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// on 'sent'
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void onDataSent(uint8_t *mac_addr, uint8_t sendStatus) {
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if (sendStatus != 0) MONITORING_SERIAL.println("Delivery failed!");
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}
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// on 'receive'
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void onDataReceive(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
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//
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#if defined(HAVE_CLIENT)
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Serial.write(incomingData, len); // we pass it over to the client.
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#endif
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// open => identify => use.
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if (incomingData[0] == '[' && incomingData[len - 1] == ']' && len == (sizeof(Note) + 2)) {
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Note note;
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memcpy((uint8_t *) ¬e, incomingData + 1, sizeof(Note));
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//
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MONITORING_SERIAL.println(note.to_string());
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//-*-*-*-*-*-*-*-*-*-
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// use 'note' here...
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// ==> N.B.: "callback function runs from a high-priority Wi-Fi task.
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// So, do not do lengthy operations in the callback function.
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// Instead, post the necessary data to a queue and handle it from a lower priority task."
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//-*-*-*-*-*-*-*-*-*-
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}
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}
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//task
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#include <TaskScheduler.h>
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Scheduler runner;
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//task #0 : blink led
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extern Task blink_task;
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void blink() {
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//
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static int count = 0;
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count++;
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//
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switch (count % 4) {
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case 0:
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digitalWrite(LED_PIN, LOW); // first ON
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blink_task.delay(LED_ONTIME);
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break;
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case 1:
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digitalWrite(LED_PIN, HIGH); // first OFF
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blink_task.delay(LED_GAPTIME);
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break;
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case 2:
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digitalWrite(LED_PIN, LOW); // second ON
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blink_task.delay(LED_ONTIME);
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break;
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case 3:
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digitalWrite(LED_PIN, HIGH); // second OFF
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blink_task.delay(LED_PERIOD - 2* LED_ONTIME - LED_GAPTIME);
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break;
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}
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}
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Task blink_task(0, TASK_FOREVER, &blink, &runner, true); // -> ENABLED, at start-up.
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//task #1 : regular post collection
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#if defined(HAVE_CLIENT)
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void collect_post() {
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//
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//postman (serial comm.)
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static bool insync = false;
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if (insync == false) {
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while (Serial.available() > 0) {
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// search the last byte
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char last = Serial.read();
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// expectable last of the messages
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if (last == ']' || last == '}') {
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insync = true;
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}
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}
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} else {
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//
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if (Serial.available() > 0) {
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//
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char type = Serial.peek();
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//
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if (type == '[') {
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//expecting a Note message.
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uint8_t frm_size = sizeof(Note) + 2;
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//
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if (Serial.available() >= frm_size) {
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//
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uint8_t frm[frm_size];
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//
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Serial.readBytes(frm, frm_size);
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char first = frm[0];
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char last = frm[frm_size - 1];
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if (first == '[' && last == ']') {
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//
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//good. ==> ok, post it.
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//
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//pseudo-broadcast using peer-list!
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//
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esp_now_send(NULL, frm, frm_size);
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//
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MONITORING_SERIAL.write(frm, frm_size);
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MONITORING_SERIAL.print(" ==(esp_now_send/0)==> ");
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//
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} else {
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insync = false; //error!
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}
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}
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}
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}
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}
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}
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Task collect_post_task(1, TASK_FOREVER, &collect_post, &runner, true); // by default, ENABLED
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#endif
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//
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void setup() {
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//led
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pinMode(LED_PIN, OUTPUT);
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//serial
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Serial.begin(115200);
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delay(100);
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//info
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Serial.println();
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Serial.println();
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Serial.println("\"hi, i m your postman.\"");
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Serial.println("-");
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Serial.println("- * info >>>");
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Serial.println("- mac address: " + WiFi.macAddress());
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Serial.println("- wifi channel: " + String(WIFI_CHANNEL));
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Serial.println("-");
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Serial.println("- * conf >>>");
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#if defined(HAVE_CLIENT)
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Serial.println("- ======== 'HAVE_CLIENT' ========");
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#endif
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#if defined(SERIAL_SWAP)
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Serial.println("- ======== 'SERIAL_SWAP' ========");
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#endif
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#if defined(DISABLE_AP)
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Serial.println("- ======== 'DISABLE_AP' ========");
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#endif
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Serial.println("-");
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Serial.println("- * addresses >>>");
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for (uint32_t i = 0; i < members.list.size(); i++) {
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Serial.print("- #" + String(i) + " : ");
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Serial.print(members.list[i].mac[0], HEX);
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for (int j = 1; j < 6; j++) {
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Serial.print(":");
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Serial.print(members.list[i].mac[j], HEX);
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}
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Serial.print(" ==> " + members.list[i].name);
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Serial.println();
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}
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Serial.println("-");
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Serial.println("\".-.-.-. :)\"");
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Serial.println();
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//wifi
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WiFiMode_t node_type = WIFI_AP_STA;
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#if defined(DISABLE_AP)
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system_phy_set_max_tpw(0);
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node_type = WIFI_STA;
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#endif
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WiFi.mode(node_type);
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//esp-now
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if (esp_now_init() != 0) {
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Serial.println("Error initializing ESP-NOW");
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return;
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}
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esp_now_set_self_role(ESP_NOW_ROLE_COMBO);
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esp_now_register_send_cb(onDataSent);
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esp_now_register_recv_cb(onDataReceive);
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for (uint32_t i = 0; i < members.list.size(); i++) {
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esp_now_add_peer(members.list[i].mac, ESP_NOW_ROLE_COMBO, 1, NULL, 0); // <-- '1' : "Channel does not affect any function" ... *.-a
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//
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// int esp_now_add_peer(u8 *mac_addr, u8 role, u8 channel, u8 *key, u8 key_len)
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// - https://www.espressif.com/sites/default/files/documentation/2c-esp8266_non_os_sdk_api_reference_en.pdf
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//
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// "Channel does not affect any function, but only stores the channel information
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// for the application layer. The value is defined by the application layer. For
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// example, 0 means that the channel is not defined; 1 ~ 14 mean valid
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// channels; all the rest values can be assigned functions that are specified
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// by the application layer."
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// - https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
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}
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#if defined(SERIAL_SWAP)
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Serial.println("- ======== 'SERIAL_SWAP' ========");
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// a proper say goodbye.
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Serial.println("\"bye, i will do 'swap' in 1 second. find me on alternative pins!\"");
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Serial.println("\" hint: osc wiring ==> esp8266(serial.swap) <-> teensy(serial3)\"");
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Serial.println("-");
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Serial.println("\".-.-.-. :)\"");
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delay(1000); // flush out unsent serial messages.
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// moving...
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Serial.swap(); // use RXD2/TXD2 pins, afterwards.
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delay(100); // wait re-initialization of the 'Serial'
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#endif
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}
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void loop() {
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//
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runner.execute();
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//
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}
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