Hey. I have received LTE EVB-KIT and BG95 module. I have assembled everything together, followed the instructions to install window drivers and managed to start the device. It is the first time I am working with the modem and right away I got some questions that I want to clarify:
-
When the USB and RS232 cable is connected, I need to additionally click PWR button in order for the com ports to appear. What is the reason behind this? What cant the device simply start by itself?
-
I can communicate with the modem using QNavigator app that I have found installed in the USB drive which came with the EVB kit. 4 Serial ports are available:
In order to communicate with the device, Quectel USB modem port must be selected.
I want to know why I cannot see this port on the device manager? I normally use Termite which is a serial terminal. I am not able to connect to the modem via other serial terminals and only QNavigator since this modem port does not appear on any of the temrinals.
- I would like to clarify regarding the Network registration. In QNavigator, I use auto initialization and the following commands are executed:
/* Start AT SYNC: Send AT every 500ms, if receive OK, SYNC success, if no OK return after sending AT 10 times, SYNC fail */
[2022-07-28 10:08:33:366_S:] AT
[2022-07-28 10:08:33:421_R:] AT
[2022-07-28 10:08:33:421_R:] OK
[2022-07-28 10:08:33:437_S:] ATI
[2022-07-28 10:08:33:498_R:] ATI
[2022-07-28 10:08:33:498_R:] Quectel
[2022-07-28 10:08:33:498_R:] BG95-M3
[2022-07-28 10:08:33:498_R:] Revision: BG95M3LAR02A03
[2022-07-28 10:08:33:498_R:] OK
[2022-07-28 10:08:33:514_S:] ATI
[2022-07-28 10:08:33:576_R:] ATI
[2022-07-28 10:08:33:576_R:] Quectel
[2022-07-28 10:08:33:576_R:] BG95-M3
[2022-07-28 10:08:33:576_R:] Revision: BG95M3LAR02A03
[2022-07-28 10:08:33:576_R:] OK
/* Use ATV1 to set the response format */
[2022-07-28 10:08:33:592_S:] ATV1
[2022-07-28 10:08:33:651_R:] ATV1
[2022-07-28 10:08:33:651_R:] OK
/* Use ATE1 to enable echo mode */
[2022-07-28 10:08:33:900_S:] ATE1
[2022-07-28 10:08:33:960_R:] ATE1
[2022-07-28 10:08:33:960_R:] OK
/* Use AT+CMEE=2 to enable result code and use verbose values */
[2022-07-28 10:08:34:116_S:] AT+CMEE=2
[2022-07-28 10:08:34:176_R:] AT+CMEE=2
[2022-07-28 10:08:34:176_R:] OK
/* Get the baudrate, if the value is 0 (auto baudrate), then it will be set to 115200 (fixed baudrate) to assure reliable communication and avoid any problems caused by undetermined baudrate between DCE and DTE, value of IPR should be saved with AT&W */
[2022-07-28 10:08:34:426_S:] AT+IPR?
[2022-07-28 10:08:34:488_R:] AT+IPR?
[2022-07-28 10:08:34:488_R:] +IPR: 115200
[2022-07-28 10:08:34:488_R:] OK
/* Use ATI to get module information of Manufacturer ID, Device module and Firmware version */
[2022-07-28 10:08:34:535_S:] ATI
[2022-07-28 10:08:34:597_R:] ATI
[2022-07-28 10:08:34:597_R:] Quectel
[2022-07-28 10:08:34:597_R:] BG95-M3
[2022-07-28 10:08:34:597_R:] Revision: BG95M3LAR02A03
[2022-07-28 10:08:34:597_R:] OK
/* Use AT+GSN to query the IMEI of module */
[2022-07-28 10:08:34:709_S:] AT+GSN
[2022-07-28 10:08:34:769_R:] AT+GSN
[2022-07-28 10:08:34:769_R:] 869084065961454
[2022-07-28 10:08:34:769_R:] OK
[2022-07-28 10:08:34:771_S:] AT+QURCCFG="URCPORT","usbmodem"
[2022-07-28 10:08:34:831_R:] AT+QURCCFG="URCPORT","usbmodem"
[2022-07-28 10:08:34:831_R:] OK
/* Use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2022-07-28 10:08:35:360_S:] AT+CPIN?
[2022-07-28 10:08:35:419_R:] AT+CPIN?
[2022-07-28 10:08:35:419_R:] +CPIN: READY
[2022-07-28 10:08:35:419_R:] OK
/* Use AT+CIMI to query the IMSI of SIM card */
[2022-07-28 10:08:35:547_S:] AT+CIMI
[2022-07-28 10:08:35:607_R:] AT+CIMI
[2022-07-28 10:08:35:607_R:] 246012102668111
[2022-07-28 10:08:35:607_R:] OK
/* Use AT+QCCID to query ICCID number of SIM card */
[2022-07-28 10:08:35:765_S:] AT+QCCID
[2022-07-28 10:08:35:826_R:] AT+QCCID
[2022-07-28 10:08:35:826_R:] +QCCID: 89370010100026681111
[2022-07-28 10:08:35:826_R:] OK
/* Use AT+CSQ to query current signal quality */
[2022-07-28 10:08:35:877_S:] AT+CSQ
[2022-07-28 10:08:35:935_R:] AT+CSQ
[2022-07-28 10:08:35:935_R:] +CSQ: 25,99
[2022-07-28 10:08:35:935_R:] OK
/* Use AT+CREG? /AT+CGREG? to query the network registration status. */
[2022-07-28 10:08:35:939_S:] AT+CREG?
[2022-07-28 10:08:35:997_R:] AT+CREG?
[2022-07-28 10:08:35:997_R:] +CREG: 0,1
[2022-07-28 10:08:35:997_R:] OK
[2022-07-28 10:08:36:013_S:] AT+CGREG?
[2022-07-28 10:08:36:075_R:] AT+CGREG?
[2022-07-28 10:08:36:075_R:] +CGREG: 0,1
[2022-07-28 10:08:36:075_R:] OK
/* Use AT+COPS? to query current Network Operator */
[2022-07-28 10:08:36:126_S:] AT+COPS?
[2022-07-28 10:08:36:185_R:] AT+COPS?
[2022-07-28 10:08:36:185_R:] +COPS: 0,0,"Telia LT",0
[2022-07-28 10:08:36:185_R:] OK
/*Use AT+CEREG? to query current EPS Network Registration Status*/
[2022-07-28 10:08:36:235_S:] AT+CEREG?
[2022-07-28 10:08:36:292_R:] AT+CEREG?
[2022-07-28 10:08:36:292_R:] +CEREG: 0,4
[2022-07-28 10:08:36:292_R:] OK
Im concerned regarding AT+CEREG? command. This command is not found in QNavigator_V1.6.9
And the modem answer to this command is
+CEREG: 0,4
Which I assume is wrong. Sucesfull registration should return 0,5. or 0,1
The BLUE light is blinking on the EVB kit which I assume indicate that the Network registration is not fully successful
- Does my SIM card need to support NB? I am not fully sure between the NB and LTE differences yet. I have plugged the SIM card to my smartphone and was able to pick up 4G signal right away, so I assumed my card is ok.
Could someone shed some light and answer my questions? Would be very helpful for me to further understand and develop code with BG95
