1
$\begingroup$

I've seen official ELRS guides for building DIY RX/TX modules. Many of them offer to use SX12xx modules with the SPI pinout. However, I've seen the same modules but with UART control only. Any reason why ELRS does not support those?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
1
$\begingroup$

It turns out ELRS requires way higher communication protocol rates. So that's why they use SPI at multiple MGhz rates.

What's more, those UART modules are not really UART natively. I've dissambled one and it turns out the main radio chip they're working on is still the same and is still controlled over SPI. But it's using one extra MCU (let's say STM8) to handle a lot of communication. So that middle layer will add even more delay to the communication.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.