Protocol of data exchange w/ modem via USB, Sleep/Wake

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rzhang
Posts: 1
Joined: Wed Jul 31, 2019 11:39 pm

Protocol of data exchange w/ modem via USB, Sleep/Wake

Post by rzhang »

Hi,

In section 4 of the "Protocol of data exchange with modem via USB interface " Sleeping/waking up device, in the request frame, there are 3 bytes that are reserved. I was wondering what value they were supposed to be?

I have tried setting them to 0x000000, 0xffffff and ignoring them (not including them in the crc-16) without getting any answer from the modem.

Thank you for your help!

smoker77
Posts: 312
Joined: Sat Feb 06, 2016 4:03 pm

Re: Protocol of data exchange w/ modem via USB, Sleep/Wake

Post by smoker77 »

Hello,
These bytes should be zero. We will add this clarification to the protocol, thank you for the feedback.
And theese bytes should present; if you send more short packet then in protocol, modem will not process the command and not reply.

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