ESP_NOW POC

ESP32/ESP_NOW/ESP_NOW_BROADCAST_test/ESP_NOW_BROADCAST_test.ino

@@ -0,0 +1,106 @@
+
+#include <WiFi.h>
+#include <esp_wifi.h>
+#include <esp_now.h>
+
+#define ONBOARD_LED      2     //GPIO02    D2
+
+// MAC ADDRESS: 1:  6c:c8:40:06:43:d4
+// MAC ADDRESS: 2:  78:1c:3c:2d:1e:78
+
+//RECEIVER MAC Address
+uint8_t broadcastAddress[] = {0x78, 0x1C, 0x3C, 0x2D, 0x1E, 0x78};
+
+void readMacAddress(){
+  uint8_t baseMac[6];
+  esp_err_t ret = esp_wifi_get_mac(WIFI_IF_STA, baseMac);
+  if (ret == ESP_OK) {
+    Serial.printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
+                  baseMac[0], baseMac[1], baseMac[2],
+                  baseMac[3], baseMac[4], baseMac[5]);
+  } else {
+    Serial.println("Failed to read MAC address");
+  }
+}
+
+
+// Structure example to send data
+// Must match the receiver structure
+typedef struct struct_message {
+  char a[32];
+  int b;
+  float c;
+  bool led;
+} struct_message;
+
+// Create a struct_message called myData
+struct_message myData;
+
+esp_now_peer_info_t peerInfo;
+
+// callback when data is sent
+void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
+  Serial.print("\r\nLast Packet Send Status:\t");
+  Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
+}
+ 
+void setup() {
+  // Init Serial Monitor
+  Serial.begin(115200);
+ 
+  // Set device as a Wi-Fi Station
+  WiFi.mode(WIFI_STA);
+
+  // Init ESP-NOW
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("Error initializing ESP-NOW");
+    return;
+  }
+
+  // Once ESPNow is successfully Init, we will register for Send CB to
+  // get the status of Trasnmitted packet
+  esp_now_register_send_cb(OnDataSent);
+  
+  // Register peer
+  memcpy(peerInfo.peer_addr, broadcastAddress, 6);
+  peerInfo.channel = 0;  
+  peerInfo.encrypt = false;
+  
+  // Add peer        
+  if (esp_now_add_peer(&peerInfo) != ESP_OK){
+    Serial.println("Failed to add peer");
+    return;
+  }
+  pinMode(ONBOARD_LED, OUTPUT);
+
+}
+ 
+void loop() {
+  // Set values to send
+  strcpy(myData.a, "THIS IS A CHAR");
+  myData.b = random(1,20);
+  myData.c = 1.2;
+
+  if (myData.led == true){
+    myData.led = false;
+    digitalWrite(ONBOARD_LED, LOW);
+  }else {
+    myData.led = true;
+    digitalWrite(ONBOARD_LED, HIGH);
+  }
+    Serial.println("myData.led");
+    Serial.println(myData.led);
+
+
+  
+  // Send message via ESP-NOW
+  esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
+   
+  if (result == ESP_OK) {
+    Serial.println("Sent with success");
+  }
+  else {
+    Serial.println("Error sending the data");
+  }
+  delay(200);
+}

ESP32/ESP_NOW/ESP_NOW_RECIVCER_test/ESP_NOW_RECIVCER_test.ino

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+
+#include <esp_now.h>
+#include <WiFi.h>
+
+#define ONBOARD_LED      2     //GPIO02    D2
+
+// Structure example to receive data
+// Must match the sender structure
+typedef struct struct_message {
+    char a[32];
+    int b;
+    float c;
+    bool led;
+} struct_message;
+
+// Create a struct_message called myData
+struct_message myData;
+
+// callback function that will be executed when data is received
+void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
+  memcpy(&myData, incomingData, sizeof(myData));
+  Serial.print("Bytes received: ");
+  Serial.println(len);
+  Serial.print("Char: ");
+  Serial.println(myData.a);
+  Serial.print("Int: ");
+  Serial.println(myData.b);
+  Serial.print("Float: ");
+  Serial.println(myData.c);
+  Serial.print("Bool: ");
+  Serial.println(myData.led);
+  Serial.println();
+}
+ 
+void setup() {
+  // Initialize Serial Monitor
+  Serial.begin(115200);
+  
+  // Set device as a Wi-Fi Station
+  WiFi.mode(WIFI_STA);
+
+  // Init ESP-NOW
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("Error initializing ESP-NOW");
+    return;
+  }
+  
+  // Once ESPNow is successfully Init, we will register for recv CB to
+  // get recv packer info
+  esp_now_register_recv_cb(esp_now_recv_cb_t(OnDataRecv));
+  pinMode(ONBOARD_LED, OUTPUT);
+
+}
+ 
+void loop() {
+ if (myData.led == true){
+      digitalWrite(ONBOARD_LED, HIGH);
+ } else {
+      digitalWrite(ONBOARD_LED, LOW);
+ }
+ delay(10);
+}