ESP32 Forum

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#include <ESP8266WiFi.h>
extern "C" {
  #include <espnow.h>
}

#define WIFI_CHANNEL 1

//MAC ADDRESS OF THE DEVICE YOU ARE SENDING TO
//byte remoteMac[] = {0x36, 0x33, 0x33, 0x33, 0x33, 0x33};
byte remoteMac[] = {0x80, 0x7D, 0x3A, 0xDC, 0xB3, 0x95};
const byte dataLength=7;
byte cnt=0;
byte rcvData[dataLength];
byte result;

void setup()
{
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin();
  Serial.print("\r\n\r\nDevice MAC: ");
  Serial.println(WiFi.macAddress());
  Serial.println("\r\nESP_Now Controller.");
  esp_now_init();
  delay(10);
  esp_now_set_self_role(ESP_NOW_ROLE_CONTROLLER);
  esp_now_add_peer(remoteMac, ESP_NOW_ROLE_COMBO, WIFI_CHANNEL, NULL, 0);
}  

void loop()
{
  for(cnt=0; cnt<dataLength; cnt++)
  {
    rcvData[cnt]++;
  }
  
  result = esp_now_send(remoteMac, rcvData, dataLength);
  Serial.println(result);
  delay(100);
}

Code: Select all

Device MAC: 60:01:94:29:DC:D7

ESP_Now Controller.
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Code: Select all

/*
    Compiled for the NODEMCU-32S
 */

#include <esp_now.h>
#include <WiFi.h>

#define WIFI_CHANNEL 1
//uint8_t localCustomMac[] = {0x36, 0x33, 0x33, 0x33, 0x33, 0x33};
uint8_t localCustomMac[] = {0x80, 0x7D, 0x3A, 0xDC, 0xB3, 0x95};
//80:7D:3A:DC:B3:95

const byte maxDataFrameSize = 100;
byte cnt=0;

void setup()
{
  Serial.begin(115200);
  Serial.print("\r\n\r\n");
  WiFi.mode(WIFI_AP); 
  Serial.println( WiFi.softAPmacAddress() );
  WiFi.disconnect();
  if(esp_now_init() == ESP_OK)
  {
    Serial.println("ESPNow Init Success!");
  }
  else
  {
    Serial.println("ESPNow Init Failed....");
  }
  esp_now_register_recv_cb(OnDataRecv);
  
}

void loop()
{
 yield();
}

void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int data_len)
{
  Serial.printf("\r\nReceived\t%d Bytes\t%d", data_len, data[0]);
}

Code: Select all

ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1100
load:0x40078000,len:9220
load:0x40080400,len:6300
entry 0x400806a4


80:7D:3A:DC:B3:95
ESPNow Init Success!