IR Transmitter/Receiver with M5StickC Plus 2

🔑 Overview

• What is IR?
• Use cases (e.g. controlling TVs, decoding remote signals)

🔧 Components Needed

• M5StickC Plus 2

• IR LED + IR receiver (e.g., TSOP38238)

• Jumper wires

• Breadboard (optional)

⚙️ Wiring Diagram

🔓 Wiring Table

IR Receiver

IR Receiver Pin	Connect To (M5StickC)
VCC	3.3V
GND	GND
OUT	GPIO 36

IR LED

IR LED Pin	Connect To (M5StickC)
+ (Anode)	GPIO 9 (or GPIO 26)
- (Cathode)	GND

🧪 Testing

1. Open Arduino IDE.
2. Select your board (M5StickC Plus or Plus2).
3. Install the IRremote library by shirriff via Library Manager.
4. Upload the IR_SendReceive.ino sketch from the examples/IR_SendReceive folder.
5. Open Serial Monitor at 115200 baud.
6. Press a button on your IR remote — received codes should display.
7. Try sending codes with an IR LED to control a device (e.g., a TV).

📡 IR Send & Receive (M5StickC / Plus / Plus2)

This sketch lets your M5StickC/Plus/Plus2 receive and send infrared (IR) signals using an IR receiver and an IR LED.

🔌 Wiring

• IR Receiver (e.g. VS1838B):
  • GND → G
  • VCC → 3.3V
  • OUT → GPIO 9
• IR LED (with 100Ω resistor):
  • Anode → GPIO 10
  • Cathode → GND

📦 Requirements

• Arduino IDE with IRremote library (v4+)
• M5StickC board support
• M5StickC Plus2 library (or Plus/C version if needed)

▶️ Usage

• Press Button A to send a test IR code (0x20DF10EF, NEC format).
• Any incoming IR signals will be displayed on the screen and printed to Serial.

📝 Notes

• This example uses the IRremote library.
• Works with many IR receivers (e.g., VS1838B) and 940nm IR LEDs.
• IR LED pins may vary per board; ensure GPIO supports PWM for sending.
• If using M5StickC Plus2, note that some GPIOs are reserved (check M5 docs).