WLToys Q303

Thank you but I already have a 4-in-1 that I don't use because it's the first version with the RX problem with nrf24l01 and a7105.
Here's a "good" nrf24l01 module: bit.ly/nrf24l01_palna

I'm afraid that even the latest version uses a fake nrf24l01, I'm fine with multiple modules in my Devo, no problem
The XN297L breakout board cost $1.35 USD shipped, cheap as chips !

Ok, that was expected.
I think (but I'm not sure) that the problem is that the nrf24l01 is not using the same frequency deviation for GFSK modulation.
It can be fine tuned on the xn297, maybe some values make it totally incompatible with nrf24l01, or only with lower frequencies.
Looks like bind stage (2402 MHz) is working, but not data (2470-2476 MHz for your 2nd TX capture)

I wouldn't worry about the crystal accuracy, all those toys are using crappy crystals

I triple checked the output of this protocol against your capture again, looks fine on my side.

Q303 protocol output (emulator):


Your capture (TX #1):

Yes, here it is:
www.dropbox.com/s/518bar70jmf2hju/deviat...0.0-ed9af3e.zip?dl=1

Ok, I'll wait for the XN297L breakout board to make more tests then.

No, I think of nothing else you can try, can you confirm that the quad has a reaction (leds or something ...) when you try to bind, even if it doesn't work ?

Sorry for the late reply, looks like I don't receive notification emails, again ...

I just received the xn297l breakout board, I'll try to find enough time this week-end to have a further look at that

ajtank wrote: Shall I make SPI capture on the quad transceiver?

That won't help for now, but if I can get it to work then it will be useful later, to help crack id / channels.

New test builds:

7e: www.dropbox.com/s/3zkbtl7p8k4ica1/deviat...0.0-38f78d6.zip?dl=1
10: www.dropbox.com/s/tgo8gfaa0xk4o3d/deviat...0.0-38f78d6.zip?dl=1