Are you using the nB-IoT modem FW? The 91 DK comes shipped with the LTE-M1 modem FW, so if you want to use nB-IoT, you will need to change to nB mode. You can do this by first downloading the latest modem FW here & then following the documentation to upload the latest modem FW. Then, use the xsystemmode AT command to set the modem to nB mode using the LTE Link Monitor app on nRF Connect for Desktop. Run AT%XSYSTEMMODE? to see whether the modem FW is in LTE-M1 or nB-IoT mode. If in LTE-M1, switch to nB using AT%XSYSTEMMODE=0,1,0,0. Make sure the modem is off before sending the command. To make nB mode persistent, set "AT+CFUN=0" afterwards.
Are you using the nB-IoT modem FW? The 91 DK comes shipped with the LTE-M1 modem FW, so if you want to use nB-IoT, you will need to change to nB mode. You can do this by first downloading the latest modem FW here & then following the documentation to upload the latest modem FW. Then, use the xsystemmode AT command to set the modem to nB mode using the LTE Link Monitor app on nRF Connect for Desktop. Run AT%XSYSTEMMODE? to see whether the modem FW is in LTE-M1 or nB-IoT mode. If in LTE-M1, switch to nB using AT%XSYSTEMMODE=0,1,0,0. Make sure the modem is off before sending the command. To make nB mode persistent, set "AT+CFUN=0" afterwards.
We had already made all changes like you stated and still we get no connection. A colleague had already tried to put it to work without success and now I am taking over.
Our first aim is to get a connection so we can measure current needs for correct definition of our power supply. We already prepared the board for measurement (R60 soldered) but we can't get any connection.
We notice a minimum consumption of 40mA and maximum 80mA during search of LTE (or in our case NB-IoT because we set AT%XSYSTEMMODE=0,1,0,0) connection. Are these normal values?
I am assigned by my company to put the DK to work so I'll need help but I can't wait weeks for an answer... Can I call you?
