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Tue Sep 05, 2017 01:00
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FooBar: Yes, I meant to write 'CMGD'. Sorry.
The 2G modem that I used previously (a Huawei E303) used to work with smsd 'out of the box'. When 2G stopped being supported by my local carriers, I upgraded to the Huawei E397u-53 as mentioned earlier.
When I realized that smsd could receive messages but could not send them with the new hardware, I investigated the issue with a dumb terminal: when attempting to use AT+CMGS, the modem returns "COMMAND NOT SUPPORT". Nothing else about the system changed.
I validated that the E397u-53 modem could successfully send a simple SMS message in TEXT mode using AT+CMGW/CMSS/CMGD commands. I didn't try this in PDU mode, even though the modem supports both modes.
I hope this helps clarifying things a bit.
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Mon Sep 04, 2017 23:19
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FooBar: Hi keke,
Thanks for the quick response :)
The modem in question is a 4G LTE Huawei E397u-53 (a.k.a Huawei BOLTZ 4G LTE modem).
Unfortunately, I have not been able to find an exact link to the manual for this modem.
However, I have found one for another Huawei modem which works the same way with regards to the CMGW, CMSS and CMSD commands: here
Alternatively, you can also see how these commands are being used here as they're standard.
I hope this helps.
Thanks,
-F.
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Mon Sep 04, 2017 21:59
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FooBar: Hi there,
First, thank you for your work maintaining 'smsd'! I've been using it for several years now, and it's been rock solid.
Recently, with 2G GSM being retired in my area, I've had to switch to an LTE modem which does not support sending messages with the AT+CMGS command that 'smsd' exclusively uses. Instead the modem only understands sending messages using the AT+CMGW, AT+CMSS and AT+CMSD commands. It turns out that this is more and more common with recent hardware...
I'd love to see a future version of 'smsd' capable of handling this alternate sending method and I'd like to hear your thoughts on this.
Thanks & best regards,
-F.
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