How to disable initial messages sent over AT channels on SGL81-W

Cellular Modules
1

When the modem starts, it sends ^SYSSTART on the AT channel, along with another message I can’t recall right now. My issue is that these messages are sent over the serial port, which is disrupting buffers in the firmware of a connected board.

Since I can’t modify the legacy firmware from the board, I need to know if there’s a way to deactivate these initial modem messages from the modem. I’ve tried to start my oem_app.bin before these messages, but the minimum autostart delay of 2 seconds makes this impossible. Is there an AT command that can solve this?

2

Hi,

^SYSSTART is always thrown after the system is started and ready to use. It cannot be disabled.
If you use UART interface, what you could try to do with AT commands is to disable the serial interfaces with AT^SPOW=0,0,0 over USB and enable after the module boots with AT^SPOW=1,0,0. I’m not sure if that is possible via application. You’d have to try. But if the module was restarted without disabling UART, it would boot again with ^SYSSTART.