HEY arduinoteam, i have another issue with the mid carrier now. I have tested the modem, it works well but recently i have not been able to detect the sim card. The AT cimmands do work well, but each time it says the sim is not insterted. The metal that holds the sim has been dangling and i think it might be that or the pins that touch the sim card that have an issue, can someone help @ArduinoIoT
Hi @alfmich1.
I think it is a good guess. The SIM card holder on the Portenta Mid Carrier hinges open to allow you to insert the card. After that, you must close the hinge and the latch it so that the card is held securely against the electrical contacts. It sounds like you have not latched the card holder shut.
Try this:
- Disconnect any power sources from the Portenta Mid Carrier, including unplugging the USB cable from the Portenta board.
- Make sure the SIM card is correctly nested in the holder on the Portenta Mid Carrier.
- Close the hinged metal top on the SIM card holder, so that the metal piece is flat down against the SIM card.
- While pressing the metal top on the SIM card holder down against the SIM card, slide the metal top in the direction toward the edge of the Portenta Mid Carrier:
The metal top will move approximately 2 mm, then you will feel it pop into the latched position. When you want to remove the SIM card, you can use a similar procedure as I described above, except in reverse.
hey, thanks for the reply. I have tried that solution a number of times but it is not working. I can hear the latch when opening and locking the sim card. I equally noticed that when locking, the card moves slightly. I have tried all the AT commands available and can confirm the issue is not with the 4G global module. For my previous issue, i noticed that the modem's time was wrong and i changed it. Hope it will solve the time synchronization issue i was having. The +QSIMSTAT commands sends back 1,0. That means sim not detected. What else can i try?
I'm not sure I understood correctly what you mean by "it is not working". After you latch the metal top of the SIM card carrier, do you still experience the "dangling" problem you reported previously?:
hey, thanks for the prompt reply. No, i do not experience any dangling. But the SIM is still not detected. Note that the sim used to be detected and i could communicate with it.
Hello again, so i was thinking, the issue might be with the connectors that make contact with the SIM instead of the handler, i am convinced there is no short circuit and I tested the connection between the 3v3 PCIE and 3v3 Buck and it is Ok. Attached is a picture of the metal contacts, is anything wrong with it?
hey, so i ordered a new mid carrier and it seems to solve the issues.One of the pins on the simholder had a short circuit apperantely. Now i am confronted with the following issue.
I tried configuring the time of the 4G EMEA global to current time but i think it still did not work, does anyone knows how to set the time of the arduino to real time? I think that might be the issue. f you have any order idea or solution, I will be happy to know it.Note, I am using the cellular connectivity, not wifi. @ptillisch