Arduino IR Universal Remote Controller

Goal: to store, manually or by recording, and to send NEC codes through IR module

Setup

Devices

In my case I've used some low-cost component that you can easily find on the web. I bought them on AliExpress

• IR transmitter
• IR Receiver
• Arduino Nano Clone CH340G
  • This clone can be annoying

Obviously you are not forced to use my same configuration, many other guides suggest to use single diodes as Tx and Rx instead modules.

Connections

Code

Let's refer to the project you can find in projects/

Initialization of the recevier:

IRrecv irrecv(RECV_PIN)

Initialization of the sender:

IRsend irsend

Store the decoded results:

decode_results results

Optionaly we can store more signals, according to each button of a remote control for example, and then we can send different signal pushing different buttons.

Get the value of the decoded signal

results.value [unsigned long]

Get the number of bits of the decoded signal

results.bit [int]

Send the received signal using value and number of bits

irsend.sendNEC(code_value,code_bits); It is better to use NEC codes to be sure We can store the number of bit of the recevied signal into a variable and then we can use it to send the signal

Considerations

Send function

IRsend.sendRC5(unsigned long data, int n_bits)

Decode funtion

IRrecv.decode(&decode_results results)

Applications

• Remote Controller

Improvements

• Store more decoded signals
• Assign a button to a signal
• Integration of display
• (...)

mattiaquadrini@gmail.com