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BGS2T RS485 not responding | Telit Cinterion IoT Developer Community

March 6, 2019 - 6:09pm, 2994 views

I have a microcontroller connected to the interface of a BGS2T-RS485 via an RS485 driver that I have successfully used to communicate with other devices, so I'm pretty sure that the hardware setup is correct, but no matter what bit-rate I use I never seen any response from the module. I can see the A and B lines responding to the microcontroller transmissions, but I never see any response from the module.

This module has never been used before, so should be in the default state.

I have tried bit-rates of: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 and 230400, none of which provide any repsonse.

Does anyone know what the default bit-rate is?

IGN is high, the module is powered from a 3S lithium ion battery pack (~12V) and delivers 5V from the 5V pin which supplies my microcontroller happily. It also seems to connect to the network as it flashes orange once every 3s.

Any hints gratefully received!