How to convert Raw Data to NEC Code?

[0xPeero]

Hello,

I have been trying to convert an IR signal using an UNO as my only 8266 is soldered somewhere inaccessible and hence I have to rely on the UNO to get NEC signal but unfortunately I am not able RAW_DATA to convert it to uint64_t data nor the code itself. Can someone please guide me?

P.S. I have the Address and Command hex saved too.

[crankyoldgit]

This program (tools/gc_decode) will convert a raw data string as if it was sent to IRrecvDumpV3 etc.
e.g.

$ cd tools
$ make gc_decode
$ ./gc_decode -raw "6012, 4022, 514, 646, 512, 1642, ..."

[Update: Corrected the example's calling syntax]

[crankyoldgit]

Here is a real NEC example:

$ ./gc_decode -raw "8960, 4480, 560, 560, 560, 560, 560, 560, 560, 560, 560, 1680, 560, 560, 560, 560, 560, 560, 560, 1680, 560, 1680, 560, 1680, 560, 1680, 560, 560, 560, 1680, 560, 1680, 560, 1680, 560, 560, 560, 560, 560, 560, 560, 560, 560, 560, 560, 1680, 560, 560, 560, 560, 560, 1680, 560, 1680, 560, 1680, 560, 1680, 560, 1680, 560, 560, 560, 1680, 560, 1680, 560"
Code length 67
Code type      3 (NEC)
Code bits      32
Code value     0x8f704fb
Code address   0x10
Code command   0x20

[crankyoldgit]

To convert from address & command (or to send using it) you would use the function:

IRremoteESP8266/src/ir_NEC.cpp

Lines 42 to 60 in 85d587f

	/// Calculate the raw NEC data based on address and command.
	/// Status: STABLE / Expected to work.
	/// @param[in] address An address value.
	/// @param[in] command An 8-bit command value.
	/// @return A raw 32-bit NEC message suitable for use with `sendNEC()`.
	/// @see http://www.sbprojects.net/knowledge/ir/nec.php
	uint32_t IRsend::encodeNEC(uint16_t address, uint16_t command) {
	command &= 0xFF; // We only want the least significant byte of command.
	// sendNEC() sends MSB first, but protocol says this is LSB first.
	command = reverseBits(command, 8);
	command = (command << 8) + (command ^ 0xFF); // Calculate the new command.
	if (address > 0xFF) { // Is it Extended NEC?
	address = reverseBits(address, 16);
	return ((address << 16) + command); // Extended.
	} else {
	address = reverseBits(address, 8);
	return (address << 24) + ((address ^ 0xFF) << 16) + command; // Normal.
	}
	}

e.g.

sendNEC(encodeNEC(0x10, 0x20));  // Will send a 32-bit NEC message with a value of 0x8f704fb.

See the previous entry above for where I got the values from etc.

[0xPeero]

Got it! Thanks a lot for your help!