CGATT=1 but ERROR when sending message

NB-IoT
1

Hello there,

I’ve been following the NB-IoT workshop last november. We used a T-mobile SIM to actually connect, which worked!

Now I have a vodafone SIM and I made some changes. I changed the Band, IP and scrambling just everything that needs to be done to be able to connect and send messages.

I currently have a CGATT=1, so it’s safe to say that I’m connected. When I send a message I get an “ERROR” message.
Here is the log of my file:

rdResp: timed out
rdResp: REBOOT_CAUSE_UNKNOWN
rdResp: u-blox
rdResp: OK
rdResp: OK
rdResp: timed out
rdResp: OK
rdResp: +NCONFIG: “AUTOCONNECT”,“FALSE”
rdResp: +NCONFIG: “CR_0354_0338_SCRAMBLING”,“TRUE”
rdResp: +NCONFIG: “CR_0859_SI_AVOID”,“FALSE”
rdResp: +NCONFIG: “COMBINE_ATTACH”,“FALSE”
rdResp: +NCONFIG: “CELL_RESELECTION”,“FALSE”
rdResp: +NCONFIG: “ENABLE_BIP”,“FALSE”
rdResp: OK
AUTOCONNECT… OK
CR_0354_0338_SCRAMBLING… OK
CR_0859_SI_AVOID… OK
COMBINE_ATTACH… OK
CELL_RESELECTION… OK
ENABLE_BIP… OK
rdResp: REBOOTING
rdResp:
rdResp: REBOOT_CAUSE_APPLICATION_AT
rdResp: u-blox
rdResp: OK
rdResp: timed out
rdResp: OK
rdResp: OK
rdResp: OK
rdResp: OK
rdResp: OK
rdResp: OK
rdResp: +CSQ: 99,99
rdResp: OK
rdResp: +CSQ: 99,99
rdResp: OK
rdResp: +CSQ: 13,99
rdResp: OK
rdResp: ERROR
rdResp: ERROR
rdResp: ERROR
rdResp: ERROR
rdResp: OK
Connected succesfully!
Temperature + humidity sensor initialized.
Temperature * 100 = 2584
Humidity * 100 = 3285
0A:18:0C:D5
Check connection…
rdResp: +CGATT: 1
rdResp: OK
Sending message…
rdResp: ERROR
Temperature * 100 = 2571
Humidity * 100 = 3212
0A:0B:0C:8C
Check connection…
rdResp: +CGATT: 1
rdResp: OK
Sending message…
rdResp: ERROR
Temperature * 100 = 2567
Humidity * 100 = 3202
0A:07:0C:82
Check connection…
rdResp: +CGATT: 1
rdResp: OK
Sending message…
rdResp: ERROR

I used the AT commands:
AT+CGDCONT=1, “IP”,“nb.inetd.gdsp”
AT+NBAND=20
AT+COPS=1,2,“20404”

I hope you can assist me with resolving this issue.

Kind regards,
Thijs

2

Hi,

I see that your Vodefone Sim connected to the network succesfully.

The libraries are only working on a NB-IoT network with coap.
Vodafone send raw udp. we are at the moment finishing the udp library.

Kind regards,
Jan

3

Hi,

Do you have any documentation on how to send raw udp using the AT commands?

Kind regards,
Thijs

4

Dear Thijs,

I added the sequence here:
http://support.sodaq.com/sodaq-one/at/

Regards,
Jan

1 Like
5

Hi Jan,

I’ve noticed some problems with the example:

AT+NSOCR=DGRAM,17,16666,1 //Create socket
AT+NSOST=0,84.200.60.162,16666,4,4142430A //Send UDP datagram on socket 0 (to echo server)
AT+NSORF=0,4 //Receive data on socket 0

The first command actually has to be “AT+NSORC=“DGRAM”,17, 16666,1”
Without quotes around the DGRAM it doesn’t create the socket. Same goes for the IP and message on the NSOST.
Here the command I had to use was “AT+NSOST=0,“84.200.60.162”,16666,4,“4142430A””.

I didn’t use the AT+NSORF=0,4 command. After the AT+NSOST I received a 0,4 as response.

After that everything worked. Thanks for the help !

Kind regards,
Thijs

1 Like