Quectel and Telit issues

Paul Bartell paul.bartell at gmail.com
Mon Jul 5 18:43:37 UTC 2021

I've seen similar messages in the past due to power supply issues.

If you have an oscilloscope available, probe the main power supply
line to your modem module and verify that the input voltage does not
drop below the allowable input voltage.

You may need to add more bulk capacitance to your board that performs
well at higher frequencies (ceramic or polymer instead of tantalum)
and / or increase the output voltage of the DC-DC converter feeding
the module (if it's not shared with other parts of your board).

On Mon, Jul 5, 2021 at 11:27 AM Mark Deneen <mdeneen at gmail.com> wrote:
> I use a Telit LE910 on newer kernels (5.10.x) without issue.
> On Mon, Jul 5, 2021, 09:03 Marc Murphy <marcmltd at marcm.co.uk> wrote:
>> Hello All
>> Been looking at an issue on my embedded device.  Have previously been using SierraWireless MC7430 and Huawei module without issues.
>> I have recently changed to try a Telit 910 and a Quectel EG21-G and get :
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