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cannot send sms
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cannot send sms

by fredpet on Wed Feb 13, 2019 6:42 pm

hi folks,
im using adafruit feather 32u4 FONA.
with the testsketch 'FONAtest' you can really test a lot of functions of the gsm-module.
some have i tested - they work fine.
its possible for me to
- setup phone calls
- receive phone calls
- receive sms.
i have a very good signal strength (otherwise the above functions wouldnt be possible) and a lipoly for powering the gsm-module peaks. antenna connected.

whats not possible for me is, to send SMS.

it appears:
'''''''''''' serial monitor:
FONA> s (sende sms)
Send to #0650990xxxx
Type out one-line message (140 char): mytext
---> AT+CMGF=1
<--- OK
---> AT+CMGS="0650990xxxx"
<--- >
> mytext
^Z
Failed
FONA>
ERROR
''''''''''''

anyone an idea to help me solve this problem?
many thanks in advance fredp

fredpet
 
Posts: 12
Joined: Wed Feb 13, 2019 6:30 pm

Re: cannot send sms

by adafruit_support_mike on Sat Feb 16, 2019 3:00 am

If the other features work, and you're using the FonaTest sketch, the most likely reason for the failure would be limitations on the cell plan for your SIM card.

At least check with your provider and see if they have any idea why outgoing SMS might fail.

adafruit_support_mike
 
Posts: 57095
Joined: Thu Feb 11, 2010 2:51 pm

Re: cannot send sms

by fredpet on Sat Feb 16, 2019 2:48 pm

dear mike,
thanks for your response!!

meanwhile I've tested the following:
a) using the sim in an ordinary smartphone - it can send and receive sms normally.

b) when using the sim in the FONA, sometimes(!!!) its posssible to send short sms (about 4 letters or so - cannot get any context) - BUT:
the receiving phone gets the message '>inhalt wird nicht unterstützt>> (content not supported).

with your reply you helped me on the right way and I did the following:

c) I changed the sim to another one from another provider. ==> now IT WORKS perfectly!!!!! (including the german 'umlauts' (diacrytic symbols))


thanks a lot!
fred

fredpet
 
Posts: 12
Joined: Wed Feb 13, 2019 6:30 pm

Re: cannot send sms

by adafruit_support_mike on Sun Feb 17, 2019 2:45 am

Glad to hear you got it working. Happy hacking!

adafruit_support_mike
 
Posts: 57095
Joined: Thu Feb 11, 2010 2:51 pm

Re: cannot send sms

by chronostret on Sat Mar 23, 2019 12:21 pm

Good to know you solve your problem. Thanks, guys for sharing the solution. I was starting use free trial version of SMS sender services. :)

chronostret
 
Posts: 4
Joined: Wed Mar 20, 2019 5:00 am

Please be positive and constructive with your questions and comments.