How to get Sontex Supercom 636 to work

[tabgab]

Dear WMBusters authors. I have a Supercom 636, but currently it is connecting to an ancient HP PDA to read our heat meters. Since we are changing some of them to the more open Qundis meters that support regular wMBus, I was trying to get this to work off my PC to try and get an integrated system working.

I get to the point where I can connect the radio to COM4 of the PC, and I can get it to function in a basic way. What I cannot replicate is how it works with Sontex's own software. There, when a "road" is executed, the hardware TX LED lights up, and a query is sent to the meter with a specific radio address (SN). Then it switches to RX mode and receives the answer. No idea what specific control codes or messages are required to do that.

I have a little Python script that is supposed to poll a specific SN meter, but the hardware looks different. Only the blue "connection" LED blinks; the TX and RX LEDs do not light up. What I get back in response is supposedly from a meter that we do not even have, so it works erratically at the moment. I am not aware of any documentation on this.

Has anyone got this to work? Do you have any tips?

Thanks!