SIM7070G support using regular uart (not usb)

[Jorge Solla]

Hi,

So I'm back again with my questions about the SIM7070G modem using a
regular UART instead of USB.
I have the modem fully working with a simple PPP + CHAT script, but it
hangs if I try to use ModemManager.
The problem is now I don't have much time to investigate where/why it
exactly hangs (ie: which at command delivered by ModemManager is
"offending" the modem).

As a quick&dirty fix: Is there any way to specify a "custom" chat script to
ModemManager?

Regards,
Jorge.
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