RG255C-GL - Bug in firmware RG255CGLABR01A04M4G_A0.004.A0.004?

IoT Modules 5G Module
1

Hi there!

I have a RG255C-GL installed in a MikroTik LtAP. I’ve updated the card to latest firmware (RG255CGLABR01A04M4G_A0.004.A0.004) and at boot-up, the card is not recognised anymore. I have to to a USB-powerreset after bootup. After contacting MikroTik-Support they tell me:

Our developer concluded that the issue comes from modems FW, which can not fixed in future RouterOS versions.
We recommend you to downgrade modems FW or contact Quectel in order to fix it in modems FW.

Anyone else expiriencing this problem? Also it seems to have stability problems but i am not sure if its RouterOS or card-firmware-related Problem.

I was hoping to get a rock-solid LTE/5G Solution for beeing on the road but at the momemt it’s a but frustrating…

Kind regards,
Joerg

2

Hello, can anyone from the Quectel-Team please look into this or shall i file a support-request and/or bug-report?

Thanks and regards

3

Dear @brainy
After power-reset, is it recongnised?
Did you try to test other firmwre?

4

Hey @silvia
Thanks for you answer. My current workaround in RouterOS is, that after startup it should do a 1-second powercycle of the miniPCIe Port, then the card is working.

With the old firmware it that (i dont know exactly which version) this problem was not there (tested with the same RouterOS Version!)

Like mentioned before, the Team of MikroTik told that it’s not a linux and/or RouterOS related problem.

Thanks!!

5

Dear @brainy
Is it possible to capture dmesg log from debug port?

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6

@silvia

i dont think i can do that :frowning:

7

I have the same problem. I added a script to do a USP Power reset after every mikrotik startup.

Have you tried to start GPS from the RG255 modem? I urgently need to start GPS from this modem on mikrotik devices.

8

Dear @brainy
Sorry about this, without log, it is hard to analyze this issue.

9

Dear @ksmolen
What is your problem? Can’t enable GNSS or others? Please share OC of your module.

10

@ksmolen

I use the internal GPS of the LtAP, so not tried the GNSS from RG255C-GL, sorry! I also have the port not cabled so can’t test it.

11

I can start GPS with AT+QGPS=1 command, but I don’t have 3V power supply for GPS antenna. At the moment I am testing modem on PC using COM ports. When I start GPS on PC then in the next step I will test on mikrotik.

Quectel RG255CGL00AB
RG255CGLABR01A04M4G_A0.004.A0.004