added functionality for a camera controller

ROFLS_Arena_Camera_Controller/ROFLS_Arena_Camera_Controller.ino

@@ -0,0 +1,116 @@
+#include <WiFi.h>
+#include <esp_wifi.h>
+#include <esp_now.h>
+
+const int camPin = 16;        // Any GPIO pin
+const int pressTime = 250;    // 0.25s HIGH pulse
+const int gapTime = 250;      // Gap between pulses for double press
+
+void doSinglePress() {
+  digitalWrite(camPin, HIGH);
+  delay(pressTime);
+  digitalWrite(camPin, LOW);
+}
+
+void doDoublePress() {
+  doSinglePress();
+  delay(gapTime);
+  doSinglePress();
+}
+
+// Must match the sender struct exactly
+typedef struct struct_message_send {
+  int boardID;
+  bool buttonSTART;
+  bool buttonSTARTforced;
+  bool buttonPAUSE;
+  bool buttonPIT;
+  bool buttonPIThold;
+  bool buttonRESET;
+  bool buttonREDTEAM;
+  bool buttonREDTEAMtapout;
+  bool buttonBLUETEAM;
+  bool buttonBLUETEAMtapout;
+} struct_message_send;
+
+struct_message_send incoming;
+
+// Recording state variable
+bool RECORDING = false;
+bool lastRECORDING = false;  // for change detection
+
+// LED blink timing
+unsigned long lastBlink = 0;
+bool ledState = false;
+
+// ESP‑NOW receive callback
+void onDataRecv(const esp_now_recv_info *info, const uint8_t *data, int len) {
+  if (len != sizeof(incoming)) return;
+
+  memcpy(&incoming, data, sizeof(incoming));
+
+  // Only accept packets from boardID 0 (referee remote)
+  if (incoming.boardID != 0) return;
+
+  // START or STARTforced → RECORDING = true
+  if (incoming.buttonSTART || incoming.buttonSTARTforced) {
+    RECORDING = true;
+  }
+
+  // RESET → RECORDING = false
+  if (incoming.buttonRESET) {
+    RECORDING = false;
+  }
+}
+
+void setup() {
+  pinMode(camPin, OUTPUT);
+  digitalWrite(camPin, LOW);  // Idle state
+
+  Serial.begin(115200);
+  delay(200);
+
+  Serial.println("Extra Receiver Ready");
+
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, LOW);
+
+  WiFi.mode(WIFI_STA);
+  WiFi.setSleep(false);
+
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("ESP‑NOW init failed!");
+    return;
+  }
+
+  esp_now_register_recv_cb(onDataRecv);
+}
+
+void loop() {
+  // Detect changes in RECORDING state
+  if (RECORDING != lastRECORDING) {
+
+    // Debug print
+    Serial.print("RECORDING state changed: ");
+    Serial.println(RECORDING ? "TRUE" : "FALSE");
+
+    // Trigger camera once on state change
+    doSinglePress();
+
+    lastRECORDING = RECORDING;
+  }
+
+  // Non‑blocking LED blink when RECORDING = true
+  if (RECORDING) {
+    unsigned long now = millis();
+    if (now - lastBlink >= 1000) {  // blink every 1s
+      lastBlink = now;
+      ledState = !ledState;
+      digitalWrite(LED_BUILTIN, ledState);
+    }
+  } else {
+    // Ensure LED is off when not recording
+    digitalWrite(LED_BUILTIN, LOW);
+    ledState = false;
+  }
+}