I have a R11e-LTE in a RBM33G and it will connect to 4G (E-UTRAN) but not 3G or GPRS. I can’t work out how to get it to connect to anything other than 4G even if I try setting the RAT to 3G or put a non 4G sim in.
I am running OpenWRT, but could run ROS as a test, if that helps as I see there is a network-mode option which allows the RAT to be set. Is there an equivalent AT command?
The AT BANDs command seems to be remembered by the modem even after a power down, but setting it to 3G or GSM and the SIM fails to register. Is there another setting which is remembered and used set to 4G (LTE) only?
I put the R11e in a second board running ROS and logged the AT commands. The AT commands sent to the modem were almost exactly as I had already tried however, the AT*BAND command was slightly different, not in the RAT (Radio Access Technology) or the frequency bands, but in some of the other parameters, so it looks like the values I was using were not right for my modem.
This is the correct ATBAND for my modem ATBAND=15,78,147,160,524487,0,2,0
The modem reports +CGMR: “MikroTik_CP_2.160.000_v010”
I have seen AT*BAND=15,79,147,480,589829,0,2,0 and other values in some of the fields.
Problem is I can’t find an accurate description for the AT*BAND command anywhere. I know the first value is the RAT, the 5th value is the frequency band, the 6th is roaming? but not sure about the rest.
Anybody don’t know the details because the vendor not provide us any AT Commands.
MikroTik create device and just implement then in they ROS, not additional documentation because that device are only compatible with ROS !.
You can first upgrade the modem firmware to v015 from your v010.
Do many single changes and watching changes can give you answer, but this is debuging the way.
You can write to support@mikrotik.com and ask them about description with at*band, maybe they give you a clue. I not debug this because I use ROS as main firmware.