[Barrow4491]

Hi,
I have built my receiver and transmitter boards but the receive LED is constantly on, and not communicating with the transmitter which seems to be OK
Any ideas
Thanks
Jim

On first boot or after any reboot, the receive LED on the RX unit will keep ON until it gets a full set of data from your TX unit (temperature / humidity, rain and wind).

Most likely your TX isn't transmitting or the receiver module is faulty. Firstly try to check the TX unit. Zitoune has described a good debug procedure.

If you wish, copy and paste here your RX_config and TX_config files along with some info about what type of sensors you are using (on the RX and TX unit) and I will give a look.

I have an AM radio nearby and it gives a squark every time the Tx led lights at 648 Khz, and I would assume from that it is transmitting???
I check the nano as suggested by uncle_bob and then swap out the Rx module and advise the result
Thanks all for the advice
Jim