UC200TEM Unknown signal quality

IoT Modules WCDMA Module
1

Hi Team,

I have got a new EVB for UC200TEM module. I’m trying basic functionalities. I am using Qnavigator to send commands. Here are my queries:
Connection: Micro USB on EVB to USB connected to PC, EVB COM1 (main) connected to PC via (RS232-USB cable).

  1. Power LED is on. Pressing PWR_KEY turns on status LED. So only 2 LEDs turns on. Remaining LEDs are off. I am expecting after using PWR_key, NET_mode and NET_status LEDs to be turned on.
  2. Basic AT commands are working. I am able to send SMS as well. However, AT+CSQ gives 99,99 (unknown quality). What could be the reason? Perhaps, the net_mode and net_status leds are not working, which may explain the reason.

Regards,
Kamlesh Bharodiya

2

Dear Kamlesh，
Thanks for your inquiry in Quectel forum.
For your issue, it is better to check more information about module, such as the following commands:
ATI
AT+COPS?
AT+CPIN?
AT+CSQ
AT+CGREG?
AT+QENG=“servingcell”

3

Dear Kyson,

Thanks a lot for your prompt response.
I am sending the command responses.
[2020-09-24 12:51:38:487_S:] ati
[2020-09-24 12:51:38:562_R:] ati
[2020-09-24 12:51:38:562_R:] Quectel
[2020-09-24 12:51:38:562_R:] UC200TEM
[2020-09-24 12:51:38:562_R:] Revision: UC200TEMAAR02A01M16

[2020-09-24 12:51:38:562_R:] OK
[2020-09-24 12:51:45:919_S:] at+cops?
[2020-09-24 12:51:45:983_R:] at+cops?
[2020-09-24 12:51:45:983_R:] +COPS: 0,2,“40554”,3

[2020-09-24 12:51:45:983_R:] OK
[2020-09-24 12:51:52:263_S:] at+cpin?
[2020-09-24 12:51:52:332_R:] at+cpin?
[2020-09-24 12:51:52:332_R:] +CPIN: READY

[2020-09-24 12:51:52:332_R:] OK
[2020-09-24 12:51:58:735_S:] at+csq
[2020-09-24 12:51:58:795_R:] at+csq
[2020-09-24 12:51:58:795_R:] +CSQ: 99,99

[2020-09-24 12:51:58:795_R:] OK
[2020-09-24 12:52:09:695_S:] at+cgreg?
[2020-09-24 12:52:09:751_R:] at+cgreg?
[2020-09-24 12:52:09:751_R:] +CGREG: 0,1

[2020-09-24 12:52:09:751_R:] OK
[2020-09-24 12:52:28:919_S:] at+qeng=“servingcell”
[2020-09-24 12:52:28:976_R:] at+qeng=“servingcell”
[2020-09-24 12:52:28:976_R:] +QENG: “servingcell”,“NOCONN”,“GSM”,xx,xx,xx,xxx,xx,x,x,-52,xx,xx,xx,xx,xx,x,-,-,-,-,-,-,-,-,-,"-"

[2020-09-24 12:52:28:976_R:] OK

Also, I found this:

image
image794×669 98.9 KB

  1. Seems that the AT+CSQ command will not work here. Is it true?
  2. Why I am not seeing the net_mode and net_status leds on?
  3. Response of QENG command provides signal dbm. Should I go ahead with this and not expect at+csq’s response to be correct?
  4. My main task is to post and get http/https requests. But without net_mode and net_status on, how can I get/post requests?

Regards,
Kamlesh

4

You can try to upgrade the firmware to have a try. Please email to support@quectel.com to get the latest firmware and upgrade tool. Thanks!

5

Hi Kyson,
I got latest firmware and upgrade tool from support team. However, I am not able to upgrade it. The tool shows this: (I tried changing the baud rate to 115200 as well. same issue reported)

3
3751×666 38.4 KB

COM port is correct, because using QNavigator, I am able to send commands on this port. But using Qnavigator also, I saw this:

image
image1119×596 46.9 KB

At the same time, device manager lists as below.

2

Please help.

Regards,
Kamlesh

6

Dear Kamlesh,’
It seems like that lack of the module USB driver, please ask support email to provide it. Thanks!

7

Hi @Kyson,

I installed the drivers and now the device driver looks like this:

image
image781×572 29.3 KB

Still:

  1. I see the error on QFlash, “Error tool cannot detect platform name”, Hence not able to update the firmware.
  2. Rest of the issues presist. [net_mode and net_status leds are off, at+csq not working, not able to get/post http requests]
    Also, the log from few at commands:
    image
    image1426×752 38.8 KB

Please help.

Regards,
Kamlesh

8

Please do not unzip the firmware package, and choose the USB diag port. Then follow up the indication to reset the module and start upgrade the firmware. Thanks!

1 Like
9

Thank you @Kyson. The issue resolved, I am able to see now, net_mode led on. CSQ command is working. However, I am run into another issues. I will post that into different thread.

10

OK.Thanks for your updating. We can close this topic now. Thanks!