ESP32 Sony IR Remote Controller with HTTP API

This ESP32 project creates a WiFi-connected IR remote controller for Sony devices. It exposes an HTTP API to send various IR commands remotely.

Features

• WiFi connectivity for remote control
• HTTP server with RESTful endpoints
• Sony IR protocol implementation
• Modular RMT-based IR transmission

Hardware Requirements

• ESP32 development board
• IR LED connected to GPIO 18 (with appropriate transistor driver)
• WiFi network access

Software Requirements

• ESP-IDF v5.5 or later

Setup

1. Configure WiFi:

   idf.py menuconfig
   

   Navigate to WiFi Configuration and set your SSID and password.

2. Build the project:

   idf.py build
   

3. Flash to ESP32:

   idf.py flash
   

4. Monitor output:

   idf.py monitor
   

The ESP32 will connect to WiFi and start the HTTP server. Note the IP address from the logs.

HTTP API

Send GET requests to the ESP32's IP address on port 80:

Endpoint	Command	Hex Code
/power	Power On/Off	0x2215
/volume_up	Volume +	0x2212
/volume_down	Volume -	0x2213
/function	Function	0x2247
/play	Play	0x3232
/pause	Pause	0x3239
/stop	Stop	0x3238
/tune_up	Tune +	0x3273
/tune_down	Tune -	0x3274
/fast_forward	Fast Forward	0x3231
/fast_backward	Fast Backward	0x3230

Example Usage

# Power on/off
curl http://192.168.1.100/power

# Volume up
curl http://192.168.1.100/volume_up

# Play
curl http://192.168.1.100/play

Each request will return a confirmation message and transmit the corresponding IR command.

Troubleshooting

• WiFi Connection Issues: Verify SSID/password and network availability
• No IR Output: Check GPIO 18 connection and IR LED circuit
• HTTP 404: Ensure correct endpoint URLs
• ESP-IDF Version: Update to latest stable version if issues persist

Circuit Schema

You chould build the following (its gemini generated in this case) circuit for this project. Connecting signal to 18th pin.

Technical Details

• Uses RMT peripheral for precise IR timing (40kHz carrier, Sony protocol)
• HTTP server runs on port 80
• IR commands are transmitted 3 times with 45ms gaps (Sony standard) I (1325) example: Turning the LED ON! I (2325) example: Turning the LED OFF! I (3325) example: Turning the LED ON! I (4325) example: Turning the LED OFF! I (5325) example: Turning the LED ON! I (6325) example: Turning the LED OFF! I (7325) example: Turning the LED ON! I (8325) example: Turning the LED OFF!