I have the usual 433mhz arduino compatible pairs like this:
I have previously setup a sender and receiver sketch OK, and seen a serial monitor result for it all working.
Today I try to hook them up in a wider project, and nothing works. Troubleshooting, I realise that if I turn the TX off, the RX is OK again. It starts receiving signal from commercial remotes etc that it could not a moment before.
I plugged the TX back in and tried the remote for my ceiling fan. Like the arduino RX unit, the fan didn't respond - it eventually did return a beep, but 1/10 tries. Again, turning the TX off resolved this.
Both are using the OOTB spring antenna which I know is less than ideal, but I am confused about how the TX could cause such an 'RF storm' that things would not work?