ESP-NOW communication MAC adress error

[csrobert]

Hello. I have problem regarding the ESP-NOW communication between ESP32 boards. I have a simple sender/receiver code. The problem I have is regarding with the MAC adress. If I use a boradcast adres 0xFF 0xFF .. I get the Delivery success message, but If I use the receiver's MAC adress I get Delivery Fail. I triple checked the MAC adress but it still deosen't work. Can you guys help me with this?
Sender Code:

Code: [Select all] [Expand/Collapse]

1. #include <esp_now.h>
2. #include <WiFi.h>
3.  
4. // REPLACE WITH YOUR RECEIVER MAC Address
5. uint8_t broadcastAddress[] = {0x10, 0xAA, 0xBB, 0xCC, 0x33, 0xF5};
6.  
7. // Structure example to send data
8. // Must match the receiver structure
9. typedef struct struct_message {
10.   char a[32];
11.   int b;
12.   float c;
13.   bool d;
14. } struct_message;
15.  
16. // Create a struct_message called myData
17. struct_message myData;
18.  
19. esp_now_peer_info_t peerInfo;
20.  
21. // callback when data is sent
22. void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
23.   Serial.print("\r\nLast Packet Send Status:\t");
24.   Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
25. }
26.  
27. void setup() {
28.   // Init Serial Monitor
29.   Serial.begin(115200);
30.  
31.   // Set device as a Wi-Fi Station
32.   WiFi.mode(WIFI_STA);
33.  
34.   // Init ESP-NOW
35.   if (esp_now_init() != ESP_OK) {
36.     Serial.println("Error initializing ESP-NOW");
37.     return;
38.   }
39.  
40.   // Once ESPNow is successfully Init, we will register for Send CB to
41.   // get the status of Trasnmitted packet
42.   esp_now_register_send_cb(OnDataSent);
43.  
44.   // Register peer
45.   memcpy(peerInfo.peer_addr, broadcastAddress, 6);
46.   peerInfo.channel = 0;  
47.   peerInfo.encrypt = false;
48.  
49.   // Add peer        
50.   if (esp_now_add_peer(&peerInfo) != ESP_OK){
51.     Serial.println("Failed to add peer");
52.     return;
53.   }
54. }
55.  
56. void loop() {
57.   // Set values to send
58.   strcpy(myData.a, "THIS IS A CHAR");
59.   myData.b = random(1,20);
60.   myData.c = 1.2;
61.   myData.d = false;
62.  
63.   // Send message via ESP-NOW
64.   esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
65.    
66.   if (result == ESP_OK) {
67.     Serial.println("Sent with success");
68.   }
69.   else {
70.     Serial.println("Error sending the data");
71.   }
72.   delay(2000);
73. }

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Receiver Code:

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1. /*
2.   Rui Santos
3.   Complete project details at https://RandomNerdTutorials.com/esp-now-esp32-arduino-ide/
4.  
5.   Permission is hereby granted, free of charge, to any person obtaining a copy
6.   of this software and associated documentation files.
7.  
8.   The above copyright notice and this permission notice shall be included in all
9.   copies or substantial portions of the Software.
10. */
11.  
12. #include <esp_now.h>
13. #include <WiFi.h>
14.  
15. // Structure example to receive data
16. // Must match the sender structure
17. typedef struct struct_message {
18.     char a[32];
19.     int b;
20.     float c;
21.     bool d;
22. } struct_message;
23.  
24. // Create a struct_message called myData
25. struct_message myData;
26.  
27. // callback function that will be executed when data is received
28. void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
29.   memcpy(&myData, incomingData, sizeof(myData));
30.   Serial.print("Bytes received: ");
31.   Serial.println(len);
32.   Serial.print("Char: ");
33.   Serial.println(myData.a);
34.   Serial.print("Int: ");
35.   Serial.println(myData.b);
36.   Serial.print("Float: ");
37.   Serial.println(myData.c);
38.   Serial.print("Bool: ");
39.   Serial.println(myData.d);
40.   Serial.println();
41. }
42.  
43. void setup() {
44.   // Initialize Serial Monitor
45.   Serial.begin(115200);
46.  
47.   // Set device as a Wi-Fi Station
48.   WiFi.mode(WIFI_STA);
49.  
50.   // Init ESP-NOW
51.   if (esp_now_init() != ESP_OK) {
52.     Serial.println("Error initializing ESP-NOW");
53.     return;
54.   }
55.  
56.   // Once ESPNow is successfully Init, we will register for recv CB to
57.   // get recv packer info
58.   esp_now_register_recv_cb(OnDataRecv);
59. }
60.  
61. void loop() {
62.  
63. }

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