esp32 as receiver

[neo3exe]

Very much a beginner with hardware here, I've done several esp32 programs.
Can the receiver hardware be done with just an esp32 + IR receiver? as in without the atmega

[zelogik]

Should be possible, "just" need to write a complete block of code able to be compatible with official IRDA code. For the moment it's just a dump of an clone of robi-tronic receiver.
The logic of code is no so complicated, but need to be really really fast with good ans heavy use of pin interrupt.
An "IRDA frame" is around 500us (ie 0,5ms), for 4 bytes sent during this time (3 + 1 CRC if i remember well).
So the decoder need to get + verify + count the number "IRDA frame" received and send the value after certain amount of time.

ie: If you get a working poc, able to decode with a simple esp32 + irda receiver (TFDU, need to be a IRDA one, not a simple IR) the code send with a emitter, it could be wonderful and get me attention to "finish" this project :D.

ie2: look into emitter.ino, it's the function codeLoop() + pulse(), the important functions.

[zelogik]

example of a working algo/POC:

If pinInterupt
get_the_complete 3+1bytes
fi

if get_the_complete 3+1bytes
CRC the 3first bytes and verify with the last bytes
increment_counter_ID++
fi

if NoMoreInterrupt_during_X_time
print send_ID_received + 1byte_counter_ID + 1byte_time +...
reset counter
fi

And some more timeout like:

• block same id during X seconds (like debouncing)
• able to decode two or more IRDA code at the same time
• add timeout/filter for IRDA received code
• ...

[isopix]

Why ESP32 (which was cool few months ago, because cheaper and more powerful than Arduino based on ATMega), when we have now RP2040 thats now cheaper than anything else ;-) ?

[neo3exe]

haha just have a bunch from other projects, RP2040 looks neat if we don't need wifi/ble

[zelogik]

Little late but:
ESP32 have wifi, and rp2040 not...
When i have created the project the rp2040 wasn´t here, but you are free to make PR :D