NEC IR codes for UGREEN HDMI 2.1 Switch

2026-08-29 Tags: hdmi, ir, arduino, esp32

Quick blog post to share IR NEC codes for UGREEN 8k HDMI 2.1 Switch! The remote on this model has four buttons, one for each input, and then a cycle/next button:

Remote Button	NEC Code
Input 1	`1FE40BF`
Input 2	`1FE20DF`
Input 3	`1FE609F`
Next Input	`1FE10EF`

Hopefully this info is useful to someone else. Here's an image of the breadboard layout that I used to capture and send them:

Breadboard with esp32, IR receiver and transmitter

And the specific model interesting parts pictured above are:
- Seeed Studio XIAO ESP32C3
- 38khz Ir Receiver Sensor Module + Ir Transmitter Sensor

If I were a savvier blogger, I'd have Amazon affiliate links up there instead... Well, it's too late now!

Also the library used is: github.com/crankyoldgit/IRremoteESP8266