Topton Jasper Lake Quad i225V Mini PC Report

[oneplane]

The SIM slot is directly wired to the MPCIe slot, so the modem has to talk directly to it. If anything goes wrong (on the modem, the PCIe slot, the SIM slot or the SIM itself) it doesn't work and the motherboard won't be able to tell you about it as it's not in the loop on that communication.

That means that the AT command sent to the modem will always be a bit of a black box since it cannot tell you where the problem is.

 

[DoubleS3ns3]

The SIM slot is directly wired to the MPCIe slot, so the modem has to talk directly to it. If anything goes wrong (on the modem, the PCIe slot, the SIM slot or the SIM itself) it doesn't work and the motherboard won't be able to tell you about it as it's not in the loop on that communication.

That means that the AT command sent to the modem will always be a bit of a black box since it cannot tell you where the problem is.

Sim is working, tested of course.

Remain the SIM Slot and the PCIe slot. if something is broken on the PCIe slot, quectel should not be identified right? I assume that probably the problem is the SIM slot

 

[Levent]

Hello, maybe someone can help understand the problem.
I dohave a topton device with N6000 CPU, the motherboard is BKHD‑1338NP‑12‑4L and this motherboard have a SIM slot.I bought Quectel EC25-EUX it work with opnsense but "AT+CPIN?" command return SIM not inserted. Is the SIM slot on this motherboard fake or what?

I have exactly the same setup. You must install SIM card when device is turned off completely then check again. Hot swapping doesn’t work at all.

EDIT: Also you must install the simcard in the position that feels wrong. Cutout on the sim must face towards you and NOT towards inside of the device.

 

[DoubleS3ns3]

I have exactly the same setup. You must install SIM card when device is turned off completely then check again. Hot swapping doesn’t work at all.

EDIT: Also you must install the simcard in the position that feels wrong. Cutout on the sim must face towards you and NOT towards inside of the device.

View attachment 45362

You totally saved me. Thanks a lot, now the SIM work.
The only problem that I'm facing now is that:

at+csq
+CSQ: 99,99

OK
at+cereg?
+CEREG: 0,0


I'm using the module without the antenna, could it be this the problem or I should be worried that IMEI could be not in allowed list here?

 

[Levent]

You totally saved me. Thanks a lot, now the SIM work.
The only problem that I'm facing now is that:

at+csq
+CSQ: 99,99

OK
at+cereg?
+CEREG: 0,0


I'm using the module without the antenna, could it be this the problem or I should be worried that IMEI could be not in allowed list here?

I’m not too sure to be completely honest. However I know that you need cell reception to be able to check to see if your device is able to register to the network. This device is a faraday cage internally, you will need SMA Connectors out of the device even if you don’t attach any antennas.

 

[dgazineu]

Hi, I have the same board but with N5100.

I think I may help you. As someone suggested before, it may be related to RAM.
I solved a very similar problem by simply replacing the "EC12" capacitor, near RAM slots.
You have to remove the solid state capacitor and put an electrolytic one.
EC12 is 560uF / 6,3V. I replaced it with a Panasonic FM.

The Low ESR of solid state capacitor, may cause some problems.
Vendor talks about "compatibility", in my opinion is just a design flaw.

Try to power on the computer without RAM. If it turns on, I think your problem is the same as mine.
I fixed it 1 year ago, it is working fine 24/24h since then.
In my case sometimes it eventually starts retrying 10/20 times.
When the power-on sequence fails, a protection kicks in and you have to detach the power plug for a couple of seconds to reset.

Just ask if you need more details.

Thanks!!!