Initial commit

door-detector-sender/src/main.cpp

@@ -0,0 +1,92 @@
+#include <esp_now.h>
+#include <WiFi.h>
+
+// Receiver MAC Address
+uint8_t broadcastAddress[] = {0x34, 0xCD, 0xB0, 0xD0, 0x76, 0x40};
+
+// Data to send, dose not matter in this code as any data will make the receiver blink
+typedef struct struct_message {
+  char a[16];
+} struct_message;
+
+struct_message myData;
+
+esp_now_peer_info_t peerInfo;
+
+#define LEDPIN 0
+#define REEDSENSORPIN 4
+
+// 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() {
+  pinMode(REEDSENSORPIN, INPUT);
+  pinMode(LEDPIN, OUTPUT);
+
+  Serial.begin(115200);
+  Serial.println("Hello World!");
+ 
+  WiFi.mode(WIFI_STA);
+
+  // Init ESP-NOW
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("Error initializing ESP-NOW");
+    return;
+  }
+
+  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;
+  }
+
+  // 2xShort
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+  // Long
+  digitalWrite(LEDPIN, 1);
+  delay(200);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+  // Normal
+  digitalWrite(LEDPIN, 1);
+  delay(100);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+}
+ 
+void loop() {
+  // Set values to send
+  strcpy(myData.a, "Heartbeat");
+  
+  if (!digitalRead(REEDSENSORPIN)) {
+    digitalWrite(LEDPIN, 1);
+    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");
+    }
+  } else {
+    digitalWrite(LEDPIN, 0);
+  }
+   
+  delay(300);
+}