receiving SMS during call

IoT Modules Legacy HL Series
1

Hi,
I don’t understand why this modem don’t be able receive SMS during call active. I don’t show the +CMTI? there is a AT command can be activate SMS reception during calling?

marc

2

Hi,

Which module you are talking about and FW?

3

Hi,
I have a similar Issue with Hilo V2.

During call, I want to recieve and read text messages.
I get my first CMTI, read my SMS - no probs.
When receiving more SMS during the same call, the module resets itself.
I am able to reproduce this behavier with max 4 SMS.
Different modules with FW 5.03 and 6.00 behave the same.

Using hterm and HiLo miniEval board:

14:08:09.629:			*PSCSC: 1, 10,, "+49684181abcde", 145, 0,,,
14:08:09.641:			*PSCSC: 1, 11,,,,,,,
14:08:10.740:			*PSCSC: 1, 13,,,,,,,
14:08:10.746:			+CRING: VOICE
ATA
14:08:13.860:			*PSCSC: 1, 14, 0,,,,,,
14:08:13.866:			OK
sending SMS
14:08:38.230:			+CMTI: "ME",28
around 14:08:40	AT+CMGR=28
14:08:40.640:			+CMGR: "REC UNREAD","+49176219vwxyz","","15/02/18,14:02:56+04"
14:08:40.657:			this is a test
14:08:40.675:			OK
sending 3 SMS within 5 secs
14:08:48.800:			+CMTI: "ME",29
around 14:08:49	AT+CMGR=29
14:08:56.658:			+KSUP: 0
14:08:58.076:			+CREG: 2
14:09:01.170:			+CREG: 1
14:10:07.511:			+CMTI: "ME",30
14:10:13.196:			+CMTI: "ME",31

Any solutions/suggestions?

4

Hi,

today I´ve tested some more.
Sending messages each 10 seconds after recieving and reading the latter worked.
This gives a period of aproximatly 13 seconds - with a delay of 3 seconds between sending and receiving.
A period of 8 seconds seemed to be OK too. Going down to 6 senonds the module makes a restart.

Bug? Feature?

Thomas

P.S.: Receiving and reading lots of messages in shot time while not in voice call works fine.

5

Are you being sure to wait for the Final OK response and the message reference for each message before starting to send the next :question:

The limiting factor on outgoing message rate is the network - 13 seconds sounds about right…

A mobile module really isn’t a great solution for bulk message sending…

6

First things first: thank you for the reply.

This was an unclear statement:

Sending was done from a mobile, the Hilo module is and was only the receiving end.
I had an indication when the message was read and then sent the next.
So: reading / indication → 10s → sending from mobile → ~3s → CMTI: → reading / indication … - works
reading / indication → 5s → sending from mobile → ~3s → CMTI: → reading / indication … - works
reading / indication → 3s → sending from mobile → ~3s → CMTI: → fails

Even an added delay (first 0.2, later 4 senonds) between CMTI and reading made no difference.

7

News, bad news!

Module on Hilo Mini Eval Board (so no interferense from my application) was in call.
I sent 5 SMs from my cell phone to Hilo within ~3 seconds.
Module restartet!

Help?!