+--------------------------------------------------------------+
|                     ESP32 Crew Beltpack                      |
|                                                              |
|  +---------------------+        +-------------------------+  |
|  | ESP-NOW Transceiver | <----> | Master Director Console |  |
|  | (2.4GHz Zero-Lag)   |        | Broadcast Link          |  |
|  +---------------------+        +-------------------------+  |
|             |                                |               |
|             v                                v               |
|  +--------------------------------------------------------+  |
|  | Cue State Machine & Tactile Acknowledgment Logic       |  |
|  +--------------------------------------------------------+  |
|             |                                |               |
|             v                                v               |
|  +---------------------+        +-------------------------+  |
|  | WS2812B Cue Sticks  |        | Haptic Vibrator &       |  |
|  | (Red / Amber / Green|        | Soft Audio Buzzer       |  |
|  +---------------------+        +-------------------------+  |
+--------------------------------------------------------------+

[ESP32 DevKit V1]                                [WS2812B Dual Cue Sticks]
+------------------+                            +-------------------------+
|           GPIO18 |------[ 330 Ohm ]---------->| DIN                     |
|           GPIO19 |<--- [Tactile Pushbutton]   | VDD (5.0V Rail)         |
|           GPIO21 |----+                       | GND (Common Ground)     |
|                  |    |                       +-------------------------+
|              GND |----+----------------------> Common Ground
+------------------+    |
v
[1k Resistor] -> [2N2222 Base]
[Collector] ---> [ERM Motor (-)]
[Emitter] -----> Common Ground

/*
* Wireless Stage Cue Light & Intercom System over ESP-NOW
* Target: ESP32 + Dual WS2812B Sticks + Tactile ACK Button
*/
#include <Arduino.h>
#include <WiFi.h>
#include <esp_now.h>
#define LED_PIN         18
#define BTN_ACK_PIN     19
#define VIB_MOTOR_PIN   21
typedef enum {
CUE_IDLE = 0,
CUE_STANDBY,  // Red
CUE_WARN,     // Amber flashing
CUE_GO,       // Green
CUE_ACKED     // Cyan
} CueState_t;
typedef struct __attribute__((packed)) {
uint8_t target_beltpack_id;
uint8_t cue_state;
uint32_t sequence_id;
} CuePacket_t;
static CueState_t current_state = CUE_IDLE;
static uint8_t my_beltpack_id = 1;
void on_data_recv(const uint8_t *mac, const uint8_t *data, int len) {
if (len != sizeof(CuePacket_t)) return;
CuePacket_t *pkt = (CuePacket_t*)data;
if (pkt->target_beltpack_id == my_beltpack_id || pkt->target_beltpack_id == 0xFF) {
current_state = (CueState_t)pkt->cue_state;
Serial.printf("[Stage Cue] Received New State: %d
", current_state);
// Trigger haptic vibration pulse
digitalWrite(VIB_MOTOR_PIN, HIGH);
delay(100);
digitalWrite(VIB_MOTOR_PIN, LOW);
}
}
void setup() {
Serial.begin(115200);
pinMode(BTN_ACK_PIN, INPUT_PULLUP);
pinMode(VIB_MOTOR_PIN, OUTPUT);
digitalWrite(VIB_MOTOR_PIN, LOW);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
if (esp_now_init() == ESP_OK) {
esp_now_register_recv_cb(on_data_recv);
}
Serial.printf("ESP32 Stage Cue Beltpack #%d Ready.
", my_beltpack_id);
}
void loop() {
// Check local physical ACK button
if (digitalRead(BTN_ACK_PIN) == LOW) {
if (current_state == CUE_STANDBY || current_state == CUE_WARN) {
current_state = CUE_ACKED;
Serial.println("[Stage Cue] Local Actor Acknowledged Cue!");
delay(300); // Debounce
}
}
vTaskDelay(pdMS_TO_TICKS(50));
}