This week I had to change the battery in my cheap wireless doorbell device from Lidl shop. But unfortunately when I was a pairing device somebody open doors with a 433MHz contact sensor and the receiver learn it as a wireless button.
It is quite funny because I inadvertently invented cheap door open alarm 😀
I do not find any way how to reset this device to total factory setup and forget all devices. So I start to study the manual. In the manual, I find that the device could have up to 5 wireless buttons. So I was hoping to overflow the memory of this device. And it works.
I got Sonoff RF Bridge flashed with OpenMQTTGateway(OMG) firmware using Pilight RF firmware. So I connect to it and sniff the button press.
Result off button sniff:
I also sniff the door sensor:
I try to send the clarus_switch via (OMG) but for some unknown reason it not work. Probably the sniff protocol was badly decided by Pilight.
BTW: the right message with clarus_switch should be:
OK Plan B!
I forget about the clarus_switch protocol and use the elro_400_switch. I try to learn receiver 8 different codes via OMG so I send 8 messages every with different unit codes.
And voiala! The memory was overflowed and I was abble learn just the right wireless button. I hope this will somebody help.