ir-tv.ino
The stick's IR emitter LED (G19) replaces remote controls: after capturing your TV's NEC code, the stick fires POWER on every press. The swiss-army knife of non-connected home automation.
Hardware required
An M5StickC Plus2 (ESP32-PICO-V3-02, 135×240 display, A/B/C buttons, passive buzzer on G2, IR + red LED on G19, MPU6886 IMU, microphone, 200 mAh battery). None to transmit; an IR receiver (TSOP) on G35 to capture your own codes.
Wiring
Internal IR LED on G19, aim at the TV sensor (~5 m range). For capture: TSOP1838 on G35, internal pull-up.
How it works
IRremoteESP8266 modulates the NEC frame (9 ms + 562 µs bursts) in interrupt-driven bit-bang on the LED. sendNEC(code, 32) replays the exact captured code. In the Arduino IDE (esp32 package), board « M5StickCPlus2 »; « M5StickCPlus2 » or M5Unified library. On the PMIC-less v2, hold button C for >2 s to power on; HOLD (G4) latches the power.
Going further
A 6-macro menu (TV, set-top, hi-fi) browsed with button B, or automatic repeat in deep sleep.
ir-tv.ino
// LED IR (G19) — bibliotheque IRremoteESP8266 portee ESP32.
// Envoyer POWER NEC : capter d'abord sa telecommande avec le sketch
// IRrecvDumpV2 (recepteur sur G35 en entree) pour les codes reels.
#include <M5Unified.h>
#include <IRremoteESP8266.h>
#include <ir_Send.h>
IRsend irsend(19); // G19 = LED IR du stick
void setup() {
auto cfg = M5.config();
M5.begin(cfg);
irsend.begin();
M5.Display.setRotation(1);
M5.Display.drawString("A = POWER TV", 20, 50, 2);
}
void loop() {
M5.update();
if (M5.BtnA.wasPressed()) {
// Exemple NEC : 0xFFE01F (POWER generique TV) — a remplacer par
// le code capte sur VOTRE telecommande.
uint32_t code = 0xFFE01F;
irsend.sendNEC(code, 32);
M5.Spk.tone(880, 60);
M5.Display.fillScreen(TFT_BLACK);
M5.Display.printf("NEC %06X envoye", (unsigned)code);
}
delay(30);
}