After much work I can build the nRF9160 at_client sample project and flash it into the development kit. Using nRF Connect, the at_client sample project only prints the line "The AT host sample started" as per the source code (shouldn't this be "AT client sample started"?). AT commands entered into nRF Connect timeout with no response. Inspecting the file main.c of at_client and there is no code to read the UART and no code to parse AT commands. I have flashed an at_client.hex file supplied by Nordic and that firmware does respond to AT commands.
Is something missing from the at_client sample project? I would need to modify the firmware so that it can switch the UART to a data mode upon registration with the LTE data network. In order to do this I need access to the UART and AT command handlers. How do I get this and the source for the working at_client.hex file?
I'm evaluating the nRF9160 for a project and need confirmation that it can work.
Thanks