Hi,
First Post so be gentle please :)
I’m trying to get this code to work on a M5Atom S3 with Arduino IDE.
/*********************************************************************************
* ESP-Now-Serial-Bridge
*
* ESP32 based serial bridge for transmitting serial data between two boards
*
* The primary purpose of this sketch was to enable a MAVLink serial connection,
* which I successfully tested at 57600 bps. In theory, much faster buad rates
* should work fine, but I have not tested faster than 115200.
*
* Range is easily better than regular WiFi, however an external antenna may be
* required for truly long range messaging, to combat obstacles/walls, and/or
* to achieve success in an area saturated with 2.4GHz traffic.
*
* I made heavy use of compiler macros to keep the sketch compact/efficient.
*
* To find the MAC address of each board, uncomment the #define DEBUG line,
* and monitor serial output on boot. Set the OPPOSITE board's IP address
* as the value for RECVR_MAC in the macros at the top of the sketch.
*
* The BLINK_ON_* macros should be somewhat self-explanatory. If your board has a built-in
* LED (or you choose to wire an external one), it can indicate ESP-Now activity as
* defined by the macros you choose to enable.
*
* When uploading the sketch, be sure to define BOARD1 or BOARD2 as appropriate
* before compiling.
*
* -- Yuri - Sep 2021
*
* Based this example - https://randomnerdtutorials.com/esp-now-two-way-communication-esp32/
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files.
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*********************************************************************************/
#include <esp_now.h>
#include <WiFi.h>
#include <esp_wifi.h>
#define BOARD1 // BOARD1 or BOARD2
#ifdef BOARD1
#define RECVR_MAC {0x94, 0xB9, 0x7E, 0xD9, 0xDD, 0xD4} // replace with your board's address
//#define BLINK_ON_SEND
//#define BLINK_ON_SEND_SUCCESS
#define BLINK_ON_RECV
#else
#define RECVR_MAC {0x94, 0xB9, 0x7E, 0xE4, 0x8D, 0xFC} // replace with your board's address
//#define BLINK_ON_SEND
#define BLINK_ON_SEND_SUCCESS
//#define BLINK_ON_RECV
#endif
#define WIFI_CHAN 13 // 12-13 only legal in US in lower power mode, do not use 14
#define BAUD_RATE 115200
#define TX_PIN 1 // default UART0 is pin 1 (shared by USB)
#define RX_PIN 3 // default UART0 is pin 3 (shared by USB)
#define SER_PARAMS SERIAL_8N1 // SERIAL_8N1: start/stop bits, no parity
#define BUFFER_SIZE 250 // max of 250 bytes
//#define DEBUG // for additional serial messages (may interfere with other messages)
#ifndef LED_BUILTIN
#define LED_BUILTIN 2 // some boards don't have an LED or have it connected elsewhere
#endif
const uint8_t broadcastAddress[] = RECVR_MAC;
// wait for double the time between bytes at this serial baud rate before sending a packet
// this *should* allow for complete packet forming when using packetized serial comms
const uint32_t timeout_micros = (int)(1.0 / BAUD_RATE * 1E6) * 20;
uint8_t buf_recv[BUFFER_SIZE];
uint8_t buf_send[BUFFER_SIZE];
uint8_t buf_size = 0;
uint32_t send_timeout = 0;
esp_now_peer_info_t peerInfo; // scope workaround for arduino-esp32 v2.0.1
#if defined(DEBUG) || defined(BLINK_ON_SEND_SUCCESS)
uint8_t led_status = 0;
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
#ifdef DEBUG
if (status == ESP_NOW_SEND_SUCCESS) {
Serial.println("Send success");
} else {
Serial.println("Send failed");
}
#endif
#ifdef BLINK_ON_SEND_SUCCESS
if (status == ESP_NOW_SEND_SUCCESS) {
led_status = ~led_status;
// this function happens too fast to register a blink
// instead, we latch on/off as data is successfully sent
digitalWrite(LED_BUILTIN, led_status);
return;
}
// turn off the LED if send fails
led_status = 0;
digitalWrite(LED_BUILTIN, led_status);
#endif
}
#endif
void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
#ifdef BLINK_ON_RECV
digitalWrite(LED_BUILTIN, HIGH);
#endif
memcpy(&buf_recv, incomingData, sizeof(buf_recv));
Serial.write(buf_recv, len);
#ifdef BLINK_ON_RECV
digitalWrite(LED_BUILTIN, LOW);
#endif
#ifdef DEBUG
Serial.print("\n Bytes received: ");
Serial.println(len);
#endif
}
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(BAUD_RATE, SER_PARAMS, RX_PIN, TX_PIN);
Serial.println(send_timeout);
WiFi.mode(WIFI_STA);
#ifdef DEBUG
Serial.print("ESP32 MAC Address: ");
Serial.println(WiFi.macAddress());
#endif
if (esp_wifi_set_channel(WIFI_CHAN, WIFI_SECOND_CHAN_NONE) != ESP_OK) {
#ifdef DEBUG
Serial.println("Error changing WiFi channel");
#endif
return;
}
if (esp_now_init() != ESP_OK) {
#ifdef DEBUG
Serial.println("Error initializing ESP-NOW");
#endif
return;
}
#if defined(DEBUG) || defined(BLINK_ON_SEND_SUCCESS)
esp_now_register_send_cb(OnDataSent);
#endif
// esp_now_peer_info_t peerInfo; // scope workaround for arduino-esp32 v2.0.1
memcpy(peerInfo.peer_addr, broadcastAddress, 6);
peerInfo.channel = WIFI_CHAN;
peerInfo.encrypt = false;
if (esp_now_add_peer(&peerInfo) != ESP_OK){
#ifdef DEBUG
Serial.println("Failed to add peer");
#endif
return;
}
esp_now_register_recv_cb(OnDataRecv);
}
void loop() {
// read up to BUFFER_SIZE from serial port
if (Serial.available()) {
while (Serial.available() && buf_size < BUFFER_SIZE) {
buf_send[buf_size] = Serial.read();
send_timeout = micros() + timeout_micros;
buf_size++;
}
}
// send buffer contents when full or timeout has elapsed
if (buf_size == BUFFER_SIZE || (buf_size > 0 && micros() >= send_timeout)) {
#ifdef BLINK_ON_SEND
digitalWrite(LED_BUILTIN, HIGH);
#endif
esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &buf_send, buf_size);
buf_size = 0;
#ifdef DEBUG
if (result == ESP_OK) {
Serial.println("Sent!");
}
else {
Serial.println("Send error");
}
#endif
#ifdef BLINK_ON_SEND
digitalWrite(LED_BUILTIN, LOW);
#endif
}
}
In the compilation i get this error, can someone help me?
/private/var/folders/x9/48x6g6gs41n1h1yplgqqpvy00000gn/T/.arduinoIDE-unsaved2025728-672-1wfntf6.6pf8/ESP_NOW_Serial/ESP_NOW_Serial.ino: In function 'void setup()':
/private/var/folders/x9/48x6g6gs41n1h1yplgqqpvy00000gn/T/.arduinoIDE-unsaved2025728-672-1wfntf6.6pf8/ESP_NOW_Serial/ESP_NOW_Serial.ino:124:15: error: no matching function for call to 'HWCDC::begin(int, SerialConfig, int, int)'
124 | Serial.begin(BAUD_RATE, SER_PARAMS, RX_PIN, TX_PIN);
In file included from /Users/lb/Library/Arduino15/packages/esp32/hardware/esp32/3.3.0/cores/esp32/HardwareSerial.h:53,
from /Users/lb/Library/Arduino15/packages/esp32/hardware/esp32/3.3.0/cores/esp32/Arduino.h:202,
from /Users/lb/Library/Caches/arduino/sketches/F8F106E4318284D476156997E0306F8D/sketch/ESP_NOW_Serial.ino.cpp:1:
/Users/lb/Library/Arduino15/packages/esp32/hardware/esp32/3.3.0/cores/esp32/HWCDC.h:61:8: note: candidate: 'void HWCDC::begin(long unsigned int)'
61 | void begin(unsigned long baud = 0);
| ^~~~~
/Users/lb/Library/Arduino15/packages/esp32/hardware/esp32/3.3.0/cores/esp32/HWCDC.h:61:8: note: candidate expects 1 argument, 4 provided
/private/var/folders/x9/48x6g6gs41n1h1yplgqqpvy00000gn/T/.arduinoIDE-unsaved2025728-672-1wfntf6.6pf8/ESP_NOW_Serial/ESP_NOW_Serial.ino:163:28: error: invalid conversion from 'void (*)(const uint8_t*, const uint8_t*, int)' {aka 'void (*)(const unsigned char*, const unsigned char*, int)'} to 'esp_now_recv_cb_t' {aka 'void (*)(const esp_now_recv_info*, const unsigned char*, int)'} [-fpermissive]
163 | esp_now_register_recv_cb(OnDataRecv);
| ^~~~~~~~~~
| |
| void (*)(const uint8_t*, const uint8_t*, int) {aka void (*)(const unsigned char*, const unsigned char*, int)}
In file included from /private/var/folders/x9/48x6g6gs41n1h1yplgqqpvy00000gn/T/.arduinoIDE-unsaved2025728-672-1wfntf6.6pf8/ESP_NOW_Serial/ESP_NOW_Serial.ino:38:
/Users/lb/Library/Arduino15/packages/esp32/tools/esp32-arduino-libs/idf-release_v5.5-b66b5448-v1/esp32s3/include/esp_wifi/include/esp_now.h:164:54: note: initializing argument 1 of 'esp_err_t esp_now_register_recv_cb(esp_now_recv_cb_t)'
164 | esp_err_t esp_now_register_recv_cb(esp_now_recv_cb_t cb);
| ~~~~~~~~~~~~~~~~~~^~
exit status 1
Compilation error: no matching function for call to 'HWCDC::begin(int, SerialConfig, int, int)'
Thanks in advance
