added preliminary implementation of Team Button LEDs

ROFLS_Arena_Remote/ROFLS_Arena_Remote.ino

@@ -14,7 +14,6 @@
 const bool writeBoardID = false;
 int boardID = 0;
 
-
 // Hardware connections
 #define START_BTN_PIN 10
 #define PAUSE_BTN_PIN 8
@@ -67,6 +66,14 @@ typedef struct struct_message_send {
 // Create a struct_message called myData
 struct_message_send sendDATA;
 
+// Add struct for receiving ESP-NOW data
+typedef struct struct_message_receive {
+  bool TEAMLED; // Boolean to control the team LED
+} struct_message_receive;
+
+// Create instance for receiving ESP-NOW data
+struct_message_receive receiveDATA;
+
 esp_now_peer_info_t peerInfo;
 
 Preferences preferences;
@@ -77,6 +84,16 @@ void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
   Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
 }
 
+// Callback function for receiving ESP-NOW data
+void OnDataReceive(const esp_now_recv_info *recv_info, const uint8_t *incomingData, int len) {
+  // Copy the received data into the struct
+  memcpy(&receiveDATA, incomingData, sizeof(receiveDATA));
+
+  // Update the LED state based on received data
+  digitalWrite(TEAM_LED_PIN, receiveDATA.TEAMLED ? HIGH : LOW);
+}
+
+
 void setup() {
   Serial.begin(115200);
 
@@ -119,6 +136,9 @@ void setup() {
     return;
   }
 
+  // Register receive callback
+  esp_now_register_recv_cb(OnDataReceive);
+
   // populate sendDATA struct with some data:
   sendDATA.boardID = boardID;
   sendDATA.buttonSTART = false;