GSM-4GLTE module rebooting issue

I have purchased GSM module
Manufactured Model number – GSM-4GLTEGPS
DigiKey Model Number - 357-GSM-4GLTEGPS-ND

I have inserted SIM card and connects the GSM module antenna, and the module Green LED is blinking once it gets the network signal.
I have connected the GSM module and PC via USB cable provided along with the GSM module.

When I connect the USB cable with PC, the GSM module is rebooting frequently.
Refer the attached video

I was installed the drivers from CD provided along with the GSM module kit, refer the image


Could you please look into the details and help me to resolve this issue.

Hello,

I am checking into this for you. Will let you know when I have any information.

I wonder if the external power supply is failing? It needs a peak of 140mA when communicating…

Does the power supply feel like it’s firmly installed? Or is it loose? 2.1mm DC power connector (centre/inner pin is positive)

Regards,

Hi Robert,

Thanks for your reply.

We are using the adopter came along with the GSM module kit, Its output rating 7.5V; 1000mA.

We ensured the power supply is firmly connected and there is no loose connection.

Even though its rebooting when we connect the USB cable.

Thank you.

Best Regards,

B.Sathya Dinesh.

Hi @bsathyadinesh sadly, this kit looks defective. Please login into your “myDigiKey” and start a Request Return process:

Regards,

1 Like

Hi Robert,

In the GSM module, it is mentioned as 7.5V to 24V and 2A max (Refer the image)

So, we just tried to power-up the GSM module with higher rating.

We used 12V adopter with 1A capacity, then the modem rebooting issue is resolved.

Is it possible for you to replace only the power adopter (or) we need to replace the total kit?

Thank you.

Best Regards,

B.Sathya Dinesh.

Sadly for us, it would be everything, as it world have to go back to the manufacturer as one unit. I’m glad a backup power supply just works, as you can utilize the product today.

Hello,

Here is the information provided by the supplier:

Sounds to me like the USB port the customer is using cannot deliver enough current to power the Modem,

The MODEM starts to power up, USB current limits out, the MODEM reset, and the process repeats…

Please suggest to customer to either add an external power supply or try the RS232 port…. To prove or disprove.

It appears they provideded the same conclusion of what has been provided.

Hi Verna,

We cross check all the USB related settings, and we could not rectify the issue.

We also tried to use RS-232 cable the same behaviour was observed.

Then only, we noticed the required power to Modem in 7.5V to 24V & 2A but the power adopter provided along with the kit is 7.5V, 1A

So we just tried to use higher rating power adopter, it temporarily resolved the issue but I am not sure whether it will create trouble in future.

I may agree with supplier if we don’t have a power adopter but, in our case, we are having additional power source for modem operation.

I wonder, why the modem needs to draw power from USB for its operation since it already having a power source.

Thank you.

Best Regards,

B.Sathya Dinesh.

It would appear to me that the 7.5W power supply that shipped with the kit is simply inadequate, if using a 12W supply solves the problem.

The wide input range strongly suggests that a switch mode supply is used internally to transform the external supply, in which case the overall power rating of the supply is the important consideration, so long as its voltage is somewhere within the stated limits.

The pictured label (which curiously seems to differ from the datasheet) would suggest that the device’s peak consumption is around 15W. The act of connecting the USB port could be reasonably expected to cause an increase in device activity and related increase in power use, which could easily cause an under-specified external supply to shut down/restart in the manner described.

I also would not expect a device that requires an external supply to draw any significant power from the USB interface. It would appear to me that the response from the supplier is overlooking that.

If using a higher-capacity external supply solves the problem, I would suggest continuing to use it and moving forward with your business.