invalid conversion from 'void (*)(const uint8_t*, const uint8_t*, int)
Bonjour à tous,
je souhaite mettre en œuvre une communication entre deux esp32 avec le protocole espnow (moins énergivore que le wifi). Afin de comprendre le fonctionnement j'ai téléchargé des exemples pour les analyser mais lorsque que je lance la vérification j'ai une erreur que je ne sais pas identifier:
Code:
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]
A noter que c'est depuis la mise à jour des librairies.
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| /
**/ ESPNOW - Basic communication - Slave
Date: 26th September 2017
Author: Arvind Ravulavaru <https://github.com/arvindr21>
Purpose: ESPNow Communication between a Master ESP32 and a Slave ESP32
Description: This sketch consists of the code for the Slave module.
Resources: (A bit outdated)
a. https://espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf
b. http://www.esploradores.com/practica-6-conexion-esp-now/
<< This Device Slave >>
Flow: Master
Step 1 : ESPNow Init on Master and set it in STA mode
Step 2 : Start scanning for Slave ESP32 (we have added a prefix of `slave` to the SSID of slave for an easy setup)
Step 3 : Once found, add Slave as peer
Step 4 : Register for send callback
Step 5 : Start Transmitting data from Master to Slave
Flow: Slave
Step 1 : ESPNow Init on Slave
Step 2 : Update the SSID of Slave with a prefix of `slave`
Step 3 : Set Slave in AP mode
Step 4 : Register for receive callback and wait for data
Step 5 : Once data arrives, print it in the serial monitor
Note: Master and Slave have been defined to easily understand the setup.
Based on the ESPNOW API, there is no concept of Master and Slave.
Any devices can act as master or salve.
*/
#include <esp_now.h>
#include <WiFi.h>
#define CHANNEL 1
// Init ESP Now with fallback
void InitESPNow() {
WiFi.disconnect();
if (esp_now_init() == ESP_OK) {
Serial.println("ESPNow Init Success");
}
else {
Serial.println("ESPNow Init Failed");
// Retry InitESPNow, add a counte and then restart?
// InitESPNow();
// or Simply Restart
ESP.restart();
}
}
// config AP SSID
void configDeviceAP() {
const char *SSID = "Slave_1";
bool result = WiFi.softAP(SSID, "Slave_1_Password", CHANNEL, 0);
if (!result) {
Serial.println("AP Config failed.");
} else {
Serial.println("AP Config Success. Broadcasting with AP: " + String(SSID));
Serial.print("AP CHANNEL "); Serial.println(WiFi.channel());
}
}
void setup() {
Serial.begin(115200);
Serial.println("ESPNow/Basic/Slave Example");
//Set device in AP mode to begin with
WiFi.mode(WIFI_AP);
// configure device AP mode
configDeviceAP();
// This is the mac address of the Slave in AP Mode
Serial.print("AP MAC: "); Serial.println(WiFi.softAPmacAddress());
// Init ESPNow with a fallback logic
InitESPNow();
// Once ESPNow is successfully Init, we will register for recv CB to
// get recv packer info.
esp_now_register_recv_cb(OnDataRecv);
}
// callback when data is recv from Master
void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int data_len) {
char macStr[18];
snprintf(macStr, sizeof(macStr), "%02x:%02x:%02x:%02x:%02x:%02x",
mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
Serial.print("Last Packet Recv from: "); Serial.println(macStr);
Serial.print("Last Packet Recv Data: "); Serial.println(*data);
Serial.println("");
}
void loop() {
// Chill
} |
extrait de l'erreur du compilateur:
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| Arduino : 1.8.13 (Windows 10), Carte : "ESP32-WROOM-DA Module, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 115200, Core 1, Core 1, None, Disabled"
sketch_oct15-recepteur:77:28: 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]
77 | esp_now_register_recv_cb(OnDataRecv); |
Je comprend (sauf erreur de ma part) que le format de déclaration des constantes n'est pas celui attendu mais je ne sais pas comment résoudre ça car je ne maitrise pas du tout le sujet.
Merci de votre aide
