ESP-NOW: Fix examples and improve logging (#9455)

libraries/ESP_NOW/examples/ESP_NOW_Broadcast_Master/ESP_NOW_Broadcast_Master.ino

@@ -67,16 +67,17 @@ void setup() {
     Serial.begin(115200);
     while (!Serial) delay(10);
 
+    // Initialize the Wi-Fi module
+    WiFi.mode(WIFI_STA);
+    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
+    while(!WiFi.STA.started()) delay(100);
+
     Serial.println("ESP-NOW Example - Broadcast Master");
     Serial.println("Wi-Fi parameters:");
     Serial.println("  Mode: STA");
     Serial.println("  MAC Address: " + WiFi.macAddress());
     Serial.printf("  Channel: %d\n", ESPNOW_WIFI_CHANNEL);
 
-    // Initialize the Wi-Fi module
-    WiFi.mode(WIFI_STA);
-    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
-
     // Register the broadcast peer
     if (!broadcast_peer.begin()) {
         Serial.println("Failed to initialize broadcast peer");

libraries/ESP_NOW/examples/ESP_NOW_Broadcast_Slave/ESP_NOW_Broadcast_Slave.ino

@@ -45,8 +45,8 @@ public:
         return true;
     }
 
-    // Function to  print the received messages from the master
-    void _onReceive(const uint8_t *data, size_t len, bool broadcast) {
+    // Function to print the received messages from the master
+    void onReceive(const uint8_t *data, size_t len, bool broadcast) {
         Serial.printf("Received a message from master " MACSTR " (%s)\n", MAC2STR(addr()), broadcast ? "broadcast" : "unicast");
         Serial.printf("  Message: %s\n", (char *)data);
     }
@@ -85,16 +85,17 @@ void setup() {
     Serial.begin(115200);
     while (!Serial) delay(10);
 
+    // Initialize the Wi-Fi module
+    WiFi.mode(WIFI_STA);
+    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
+    while(!WiFi.STA.started()) delay(100);
+
     Serial.println("ESP-NOW Example - Broadcast Slave");
     Serial.println("Wi-Fi parameters:");
     Serial.println("  Mode: STA");
     Serial.println("  MAC Address: " + WiFi.macAddress());
     Serial.printf("  Channel: %d\n", ESPNOW_WIFI_CHANNEL);
 
-    // Initialize the Wi-Fi module
-    WiFi.mode(WIFI_STA);
-    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
-
     // Initialize the ESP-NOW protocol
     if (!ESP_NOW.begin()) {
         Serial.println("Failed to initialize ESP-NOW");

libraries/ESP_NOW/examples/ESP_NOW_Network/ESP_NOW_Network.ino

@@ -162,10 +162,10 @@ public:
     void onSent(bool success) {
         bool broadcast = memcmp(addr(), ESP_NOW.BROADCAST_ADDR, ESP_NOW_ETH_ALEN) == 0;
         if (broadcast) {
-            log_v("Broadcast message reported as sent %s", success ? "successfully" : "unsuccessfully");
+            log_i("Broadcast message reported as sent %s", success ? "successfully" : "unsuccessfully");
         }
         else {
-            log_v("Unicast message reported as sent %s to peer " MACSTR, success ? "successfully" : "unsuccessfully", MAC2STR(addr()));
+            log_i("Unicast message reported as sent %s to peer " MACSTR, success ? "successfully" : "unsuccessfully", MAC2STR(addr()));
         }
     }
 };
@@ -253,16 +253,17 @@ void setup() {
     Serial.begin(115200);
     while (!Serial) delay(10);
 
+    // Initialize the Wi-Fi module
+    WiFi.mode(WIFI_STA);
+    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
+    while(!WiFi.STA.started()) delay(100);
+
     Serial.println("ESP-NOW Network Example");
     Serial.println("Wi-Fi parameters:");
     Serial.println("  Mode: STA");
     Serial.println("  MAC Address: " + WiFi.macAddress());
     Serial.printf("  Channel: %d\n", ESPNOW_WIFI_CHANNEL);
 
-    // Initialize the Wi-Fi module
-    WiFi.mode(WIFI_STA);
-    WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
-
     // Generate yhis device's priority based on the 3 last bytes of the MAC address
     WiFi.macAddress(self_mac);
     self_priority = self_mac[3] << 16 | self_mac[4] << 8 | self_mac[5];

libraries/ESP_NOW/examples/ESP_NOW_Serial/ESP_NOW_Serial.ino

@@ -54,6 +54,8 @@ void setup() {
     Serial.println(ESPNOW_WIFI_CHANNEL);
     WiFi.setChannel(ESPNOW_WIFI_CHANNEL, WIFI_SECOND_CHAN_NONE);
 
+    while(!(WiFi.STA.started() || WiFi.AP.started())) delay(100);
+
     Serial.print("MAC Address: ");
     Serial.println(ESPNOW_WIFI_MODE == WIFI_AP ? WiFi.softAPmacAddress() : WiFi.macAddress());
 

libraries/ESP_NOW/src/ESP32_NOW.h

@@ -41,9 +41,12 @@ public:
 
   //optional callbacks to be implemented by the upper class
   virtual void onReceive(const uint8_t * data, size_t len, bool broadcast) {
-    log_i("Received %d bytes from " MACSTR " %s", len, MAC2STR(mac), broadcast ? "broadcast" : "");
+    log_i("Received %d bytes from " MACSTR " %s", len, MAC2STR(mac), broadcast ? "(broadcast)" : "");
+  }
+
+  virtual void onSent(bool success) {
+    log_i("Message transmission to peer " MACSTR " %s", MAC2STR(mac), success ? "successful" : "failed");
   }
-  virtual void onSent(bool success) { log_i("Message reported as sent %s", success ? "successfully" : "unsuccessfully"); }
 };
 
 class ESP_NOW_Class : public Print {