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Blynk Edgent WiFi provisioning and ESP-NOW on an ESP32

Need Help With My Project
#1

I have an existing project that consists of multiple ESP32 devices communicating via ESP-NOW.
There is a master device that both sends to and receives from all other devices. I would like to add and Edgent functionality for WiFi provisioning and also OTA updates.

If I simply add the Edgent example to my project, I can get Edgent up and running perfectly - the WiFi provisioning and also the OTA are working as expected. However, as soon as BlynkEdgent.begin(); is called, it instantly breaks all ESP-NOW communication, and I am not experienced enough with Blynk to understand exactly what is causing this.

Is there an example or an existing project I could reference that has both Edgent and ESP-NOW running simultaneously?

Rowan

#2

I have tried using a barebones example to try incorporate the two as a proof of concept. This is the code Iā€™m using, based on the latest ESP32 Edgent example

/*************************************************************
  Blynk is a platform with iOS and Android apps to control
  ESP32, Arduino, Raspberry Pi and the likes over the Internet.
  You can easily build mobile and web interfaces for any
  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: https://www.blynk.io
    Sketch generator:           https://examples.blynk.cc
    Blynk community:            https://community.blynk.cc
    Follow us:                  https://www.fb.com/blynkapp
                                https://twitter.com/blynk_app

  Blynk library is licensed under MIT license
 *************************************************************
  Blynk.Edgent implements:
  - Blynk.Inject - Dynamic WiFi credentials provisioning
  - Blynk.Air    - Over The Air firmware updates
  - Device state indication using a physical LED
  - Credentials reset using a physical Button
 *************************************************************/

/* Fill in information from your Blynk Template here */
/* Read more: https://bit.ly/BlynkInject */
#define BLYNK_TEMPLATE_ID "TMPLXKNDXvcy"
#define BLYNK_TEMPLATE_NAME "OTA Test"

#define BLYNK_FIRMWARE_VERSION        "0.2.1"

#define BLYNK_PRINT Serial
//#define BLYNK_DEBUG

#define APP_DEBUG

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

// Define the ESP-NOW peer address of the other ESP32
uint8_t peerAddress[] = {0x34, 0x94, 0x54, 0xE5, 0xC0, 0xF8};

// Define the data structure for sending and receiving data over ESP-NOW
struct espNowData {
  int data1;
  float data2;
};

// Define the ESP-NOW send callback function
void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
  if (status != ESP_NOW_SEND_SUCCESS) {
    Serial.println("Data send failed");
  }
}

// Define the ESP-NOW receive callback function
void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int len) {
  // Cast the data buffer to the espNowData structure
  espNowData receivedData;
  memcpy(&receivedData, data, sizeof(receivedData));
  
  // Process the received data
  Serial.print("Received data: ");
  Serial.print(receivedData.data1);
  Serial.print(", ");
  Serial.println(receivedData.data2);
}

BLYNK_CONNECTED()
{
  Blynk.virtualWrite(V0, BLYNK_FIRMWARE_VERSION);
}

void setup()
{
  Serial.begin(115200);
  delay(100);

  // Print Mac Address.
  Serial.println();
  Serial.print("ESP Board MAC Address:  ");
  Serial.println(WiFi.macAddress());

  // Connect to WiFi and Blynk
  BlynkEdgent.begin();

  // Initialize ESP-NOW
  WiFi.mode(WIFI_STA);
  if (esp_now_init() != ESP_OK) {
    Serial.println("ESP-NOW initialization failed");
    return;
  }
  
  // Register the ESP-NOW send callback function
  esp_now_register_send_cb(OnDataSent);
  
  // Register the ESP-NOW receive callback function
  esp_now_register_recv_cb(OnDataRecv);
  
  // Register the peer address
  esp_now_peer_info_t peerInfo;
  memset(&peerInfo, 0, sizeof(peerInfo));
  memcpy(peerInfo.peer_addr, peerAddress, sizeof(peerAddress));
  peerInfo.channel = 1;
  peerInfo.encrypt = false;
  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Error adding ESP-NOW peer");
    return;
  }
  
  
}

void loop() {
  // Send data over ESP-NOW
  espNowData sendData = {123, 3.14};
  esp_err_t result = esp_now_send(peerAddress, (uint8_t *) &sendData, sizeof(sendData));
  if (result != ESP_OK) {
    Serial.println("Data send failed");
  }
  else {
    Serial.print("Sent data: ");
    Serial.print(sendData.data1);
    Serial.print(", ");
    Serial.println(sendData.data2);
  }
  delay(1000);
  // Process Blynk events
  BlynkEdgent.run();
}

If I comment out BlynkEdgent.run(), ESP-NOW works flawlessly. However, as soon as BlynkEdgent.run() is called, it seems to break ESP-NOW, resulting in :

ESPNOW: esp now not init!

Can anyone point me in the right direction to getting them to run simultaneously?