Hi all,
I am trying to get going very simple connection between multiple devices - specifically the end product is first-responder walkie-talkies. Effectively all I need is simple wireless modems for which I will provide on-air protocol myself.
I am using the nrf24l01+ as it is supported by the NXP FRDM-K64F dev kits, of which I have many!
After lots of assistance here earlier I am now able to send packets of exactly the right length, with the correct addressing fields, and decode them using another nRF24L01+ attached to a raspberry pi and OSS nRFsniffer application.
The only problem is that my received data are all corrupt!
I put the logic analyser on the SPI interface and I can see that the data I am sending are correct - in one case a signon banner and, on interrupt, continuous ABCD... etc for 32 bytes to simulate audio. But the data decode on the air is random garbage. I can see no patterns to indicate source of error.
I cannot understand who my commands to the module are being decoded correctly, hence the transmissions, but the data portion are not!
The only thing I can think of is PLL instability. So hence my question, is there any way to test this on the SPI interface? I can see that it can be forced locked on but no way to check its status.
I have eliminated hardware failure by swapping multiple MCUs and transceiver boards in and out.
Any help really appreciated!
Nigel
