[Solved] No info passed from superMini to wroom through espNow

[Patriboom]

Hello,
my ESP32wroom does not receive data from ESP32c3supermini

Both ESP32 must be able to both send and receive.

The code retruns no error message

Code: Select all

 WiFi.mode(WIFI_AP_STA);  //Mode de fonctionnement: serveur (AP) et « station »
  WiFi.softAPConfig(APlocalIP, APgateway, APsousRes);
  WiFi.softAP(APssid, APpwsd);  //Point d'accès ... ceci servira aux ESP8266 satellites selon la syntaxe  WiFi.softAP(ssid, pwsd);
  WiFi.STA.begin();

  if (esp_now_init() == ESP_OK) {
    Serial.println("ESP_now est bien démarré.");
    esp_now_register_recv_cb(esp_now_recv_cb_t(Recevons));
    esp_now_register_send_cb(esp_now_send_cb_t(Envoyames));

    peerInfo.encrypt = false;
    memcpy(peerInfo.peer_addr, adresPRINC, 6);
    Serial.println((esp_now_add_peer(&peerInfo) != ESP_OK) ? "Échec avec peerInfo de adresPRINC. " : "Infos adresPRINC chargée.");
}  

but, still, when superMini tries to send to wroom,

Code: Select all

     interESP.genre = 2;
      esp_now_send(adresPRINC, (uint8_t *) &interESP, sizeof(interESP));
 

I receive a « Oups! » from

Code: Select all

void Envoyames(uint8_t *mac_addr, uint8_t status) {
  Serial.print("Nous avons expédié, et voici le résultat : \t");
  Serial.println(status == ESP_NOW_SEND_SUCCESS ? " OK " : " Oups! ");
}

On its side, wroom does show absolutly nothing as receipient, even if its receiving code ask for SerialPrint like

Code: Select all

void Recevons(const uint8_t * mac, const uint8_t *incomingData, int len) {
  memcpy(&interESP, incomingData, sizeof(interESP));
  Serial.print  ("Nous recevons depuis le module ");
  Serial.print  (String(mac[0]));
  Serial.print  (":");
  Serial.print  (String(mac[1]));
  Serial.print  (":");
  Serial.print  (String(mac[2]));
  Serial.print  (":");
  Serial.print  (String(mac[3]));
  Serial.print  (":");
  Serial.print  (String(mac[4]));
  Serial.print  (":");
  Serial.println(String(mac[5]));
  Serial.print  ("Nous sommes ici en ligne de réception (302) avec ");
  Serial.print  ("le genre = ");
  Serial.println(interESP.genre);
}

About you ... what's my problem ?

Thanks.

[lbernstone]

I didn't look closely at your code, but you must ensure that ESP_NOW nodes are using the same WiFi channel (ie, tuned to the same radio frequency). Look at the old examples if you don't want to use the fully OO library.

[Patriboom]

That's a good tip.
I'll try the library you suggest me rather than the one already installed (default intalled).
https://github.com/espressif/arduino-es ... Master.ino ' code starts like

#include <Arduino.h>
#include "ESP32_NOW.h"
#include "WiFi.h"

I can at once see it's using different library, since my code starts like

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#include <esp_now.h>    //  Cette fonction est incluse dans la bibliothèque ESP32  sinon :  https://github.com/espressif/esp-idf/blob/master/components/esp_wifi/include/esp_now.h
                        //exemples :  https://www.aranacorp.com/fr/communication-entre-deux-esp32-avec-esp-now/

Thanks. I'll try it and let you know.

[lbernstone]

arduino-esp32 is a C++ wrapper/hal around the esp-idf. Your code is probably based off something like the esp-idf espnow example. There's more than one way to do it.

[Patriboom]

Thanks.
I could not find any difference between my old code and the one I just rebuilt but now it's working, based on - still - esp_now and examples given in https://randomnerdtutorials.com/esp-now ... duino-ide/.

Thanks all. Sorry for those who encounter the same issue, I can not help from this experience.

[Patriboom]

Ok more info:

esp_now transmission doesn't work when WiFi.begin(ssid, pswd) is there ( there is a Wifi connection live).
I have to find out how to sucess with that ... maybe after a WiFi.end() ? WiFi.disconnect() ?

[Patriboom]

Solution found:

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  WiFi.begin(ssid, pswd);
///tasks to do on line
//
WiFi.disconnect();
WiFi.mode(WIFI_OFF);
WiFi.mode(WIFI_STA);
////Loading and processing the esp_now tasks