RX stopped working

[pmc]

NRF24L01+ paired to Arduino (2 units) Using Mirf sample code for server & client App worked initially but stopped after some tweaking of code. Uploaded original versions without successful RX of either module.

Q: Is it possible that close proximity of modules ~ 10mm caused saturation/blown RX circuit. If so what is closest "safe" distance of RF modules?

Note: On Arduino Uno board, both units' TX LEDs flash at about 1 Hz but RX never comes on.

Thanks in advance for replies.

[Håkon Alseth]

Hi,

If you're using modules that has a PA, then placing them close to each other may damage the device, as the input power could exceed the 0 dBm max input. The recommendation is then to detach the antenna (if external antenna is used) or reduce the output power of both RX and TX to -18 dBm.

1. If you check the power consumption of your devices and compare this to the numbers in the datasheet, you should be able to see if some pins are damaged. Set the device into one of the standby-modes and compare.
2. You can check the pin "VDD_PA" to see if the transmitter is sending any data. It will be active when a transmission goes over-the-air.

Best regards Håkon