I was attracted to the idea of having a wireless hum/temp sensor and so I built this. I prototyped it on a breadboard, and I also soldered it on a PCB. I extended the antenna with a 8.3 cm wire.
But I can't get it to work stable. Sometimes it works for many hours and sometimes only for one hour. And then it just hangs. A reset of the at85 sometimes helps, but most of the times I need to power it off and on again.
I need it to work reliably for several weeks. Any suggestions ?
@Ivanli I assume this was directed at me? If so, yes, I will gladly post all my results, working code, video etc. Unfortunately I have this major stumbling block that I am unable to figure out the RF codes (I am using a 15-channel Dooya DC2702 transmitter; the receiver is unfortunately not accessible since it's in the roller motor housing). Not sure if I am using Audacity incorrectly, whether I have too much noise, but my Chinese RF433 receiver seems not to pick up any signal from the DC2702, even if I am within a few centimeters from the receiver). The sniffer circuit I used is: https://www.codrey.com/electronic-circuits/433mhz-rf-sniffer/. I also tried using @petewill's circuit. Neither seems to want to record.
@zebmina did you attach an antenna to both the transmitter and the receiver?
Also, your radios are very close together, so the receiver might saturate (but that would be the next hurdle, first you need to receive something)