esp8266 to esp32 with espnow.h

cepics
Posts: 5
Joined: Sat Dec 08, 2018 10:13 am

esp8266 to esp32 with espnow.h

Postby cepics » Sat Dec 08, 2018 10:17 am

Hi,
is it possible to use espnow.h to send sensor value from esp8266 to esp32?

tnks
Last edited by cepics on Sun Dec 09, 2018 7:04 pm, edited 1 time in total.

cepics
Posts: 5
Joined: Sat Dec 08, 2018 10:13 am

Re: esp8266--->espnow.h---->esp32

Postby cepics » Sun Dec 09, 2018 7:02 pm

nobody??

cepics
Posts: 5
Joined: Sat Dec 08, 2018 10:13 am

Re: esp8266 to esp32 with espnow.h

Postby cepics » Wed Dec 12, 2018 3:02 pm

Hi all,
Im trying this example code https://github.com/leonyuhanov/ESP-NOW-TX-RX

uploading and running this sketch on esp8266 tx side: https://github.com/leonyuhanov/ESP-NOW- ... smiter.ino

Code: Select all

#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);
}
and this is the serial monitor tx side (esp8266) output:

Code: Select all

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

ESP_Now Controller.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
... and this sketch on the rx side (esp32): https://github.com/leonyuhanov/ESP-NOW- ... ceiver.ino

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]);
}
with tis output on serial moritor:

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!
I'm a super newbi and I don't understand why data are not passing.....

any idea?

help please !!!

best regards

cepics
Posts: 5
Joined: Sat Dec 08, 2018 10:13 am

Re: esp8266 to esp32 with espnow.h

Postby cepics » Wed Dec 12, 2018 11:45 pm

Here the answer :
https://github.com/leonyuhanov/ESP-NOW-TX-RX

thanks a lot to all

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