Hi Sebastian,
Please see below:
On 27/07/2021 15:38, Denis Kenzior wrote:
Hi Alex,
On 7/20/21 11:11 AM, Alex J Lennon wrote:
Hi all,
I'm doing a bit of work with Ofono again, extending support for a
Quectel EG91 - handling additional cell strength information which
seems necessary for LTE.
I'm using Quectel's AT+QCOPS which is returning some negative signal
strengths and after some investigation I've spotted that
gatresult::g_at_result_iter_next_number() doesn't handle negative
numbers.
AT commands do not have a concept of negative numbers. v.250 Section
5.3.1:
<number> may be a string of one or more characters from "0" through
"9" representing a decimal
integer value. Commands that expect a <number> are noted in the
description of the command (see
clause 6).
I don't recall any other vendor using negative values in AT commands.
If you want to add a negative number parser to GAtChat, then please
make it a separate method, so that it is very clear that a vendor
'extension' is being worked around.
Regards,
-Denis
The team at Ofono are suggesting that Quectel (EG91) should not be
returning negative numbers in AT command responses
These are returned to an AT+QCOPS command where signal strength is given.
Can you comment?
Thanks,
Alex
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