I’ve three temperature and moisture sensors (POPE701202). The places where I intend to install them are one floor underneath the raspberry and there are one or two stone walls with wooden doors in between. There they did not work reliably
I bought the same antenna like moidaboard showed in the first post, replaced the rod with a 353 mm long solid copper wire, soldered the core to the green hole, the shield to GPIO pin six (ground) and cut the electrical connection between pcb antenna and RaZberry with a knife because I’m afraid of breaking the board when trying to break off pcb antenna. I measured that there was no more continuity between pcb antenna and the board. I also made sure that there is continuity between the green hole and the external antenna wire and that there is continuity between the antenna’s foot and ground on the raspberry. Because I didn’t know about the 0 Ohm resistor practically no antenna was connected. results:
no more background noise at all
-63 dBm from sensors in 2,5 m distance to antenna
-89 dBm or less from sensors at target locations -> no reliable connections
This is strange to me: Without any antenna it received this signal strength.
Just like Arek I wondered if I might have broken the board, found this forum and moved the 0 Ohm resistor to the green position.
-82 dBm background noise
-43 to -48 dBm from sensors in 2,5 m distance to antenna
-77 dBm or less from sensors at target locations -> no reliable connections
Signal strength is much higher now but still doesn’t provide reliable connections. I assume it’s because the antenna amplifies background noise by the same amount like it does amplify the sensors and -77 dBm or less are too close to background noise?
I expect the z-wave radio to cover my small house and I really don’t like to spread wall plugs I don’t need only to repeat the signal.
Has anyone any suggestions?