Hello,
Thank you for your question,
The information on FMB125 SMS / GPRS commands can be found here:
https://wiki.teltonika.lt/view/FMB_SMS/GPRS_Commands
Please make sure you follow the description of "setdigout" command:
https://wiki.teltonika.lt/view/FMB_setdigout
Example:
"setdigout 011 30 ? 20 10 30 30" will set DOUT1 to low level for 30 seconds if speed is 10 km/h or lower, DOUT2 to high level for infinite time if speed is 30 km/h or lower and DOUT3 to high level for 20 seconds if speed is 30 km/h or lower.
In your case the command to set up digital outputs will be always received, the digital output 1 will be set to to High level for infinite time when the speed is lower than 10 km/h.
Hope this helps,
Regards.