Pronto Infrared Format

Pronto Infrared Codes are a type of language used by infrared remote controls to send command signals to the receiver, which is usually a piece of home theater equipment but can apply to other things too. The pronto infrared format is the most common IR signals sent by remote controls to audio visual devices. Pronto comes in two flavors, greyscale and color. The codes themselves consist of 4 letter hexadecimal 'words', arranged in sets of 11, 21, and other amounts. The Pronto Infrared format sends infrared codes containing information such as device name, function name, and button name-- all of this in every code sent. The pronto code allows for 2 commands for each button, one when you originally press it, and another that repeats itself as you hold the button.

Convert HEX IR Codes to decimal

Hex code = WXYZ

W(4096) + X(256) + Y(16) + Z = Decimal IR Code

Pronto Infrared Preamble

4 Hexadecimal words, each of 4 letters.

(the rest of the signal is chopped off for the example)

Example: 0000 0073 0000 0021

Description:

Set 1, 0000 implies to start the IR signal.

Set 2, 0073 specifies the carrier frequency that the IR signal uses. 0073 is for 38khz

Set 3, 0000 length of the one time burst (the initial action signal)

Set 4, 0021 length of the second burst (the repeat action, when holding down button)

External Resources

Remote Central - Pronto IR Codes Advanced Into