WP7702 keeps disconnecting

1

I’m having an issue where our board keeps disconnecting after a couple of seconds. I’ve managed to reproduce the issue using the cm data command:
cm data connect
ping google.com
[several successful ping commands]
ping: sendto: Network is unreachable

What are some things I can check to see what is happening and to fix the connection issues?

Here is a log of the following steps:
cm radio on
cm data connect
ping google.com
2022-10-06 connection cleared log.txt (24.4 KB)

If i look at AT!GSTATUS (before, during and after connection active) I see no obvious changes either

image
image518×691 12.2 KB

2

can you try with other network operator?
Do you see problem on LTE network?
What FW are you using?

3

I’m not sure how to switch network operator.

for the RAT it was set to AUTO, after switching to LTE it failed to set up the connection at first. When I got it to work it still disconnects after a while.
2022-10-06 connection cleared log LTE.txt (51.2 KB)

FW:
root@swi-mdm9x28-wp:~# cm info
Device: WP7702
IMEI: 352653090293374
IMEISV: 6
FSN: 4L029586170210
Firmware Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
Bootloader Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
MCU Version: 002.015
PRI Part Number (PN): 9909138
PRI Revision: 001.009
Carrier PRI Name: GENERIC
Carrier PRI Revision: 001.071_001
SKU: 1104405
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 286 Unexpected: 0

4

how is “cm radio” response??

Have you tried the R15 in leaf?

│ swi-wp77_6.0.0.beta │ SDK for WP77 (Release 15 + Legato 21.05.0)

5

Radio is registered, then i do the cm data connect and it is connected, and then after <1 minute it disconnects and the radio stays registerd

root@swi-mdm9x28-wp:~# cm radio
Power:                         ON
Current Network Operator:      DATA ONLY
Current RAT:                   LTE network (LE_MRC_RAT_LTE)
Status:                        Registered, home network (LE_MRC_REG_HOME)
Signal:                        Very strong signal strength (5)
PS:                            Packet Switched Registered, home network (LE_MRC_REG_HOME)

root@swi-mdm9x28-wp:~# cm data connect
Setting up profile 1
Connecting ... ok
Checking if device 'rmnet_data0' is up ... ok
Routing inet ... ok
Updating /etc/resolv.conf ... ok
root@swi-mdm9x28-wp:~# cm data
Index:                         1
APN:                           nextM2M
PDP Type:                      IPV4V6
Connected:                     yes
Interface:                     rmnet_data0
Family[IPv4]:                  inet
IP[IPv4]:                      10.104.1.139
Gateway[IPv4]:                 10.104.1.140
Dns1[IPv4]:                    192.168.230.10
Dns2[IPv4]:                    N/A
root@swi-mdm9x28-wp:~# cm data
Index:                         1
APN:                           nextM2M
PDP Type:                      IPV4V6
Connected:                     no
root@swi-mdm9x28-wp:~# cm radio
Power:                         ON
Current Network Operator:      DATA ONLY
Current RAT:                   LTE network (LE_MRC_RAT_LTE)
Status:                        Registered, home network (LE_MRC_REG_HOME)
Signal:                        Very strong signal strength (5)
PS:                            Packet Switched Registered, home network (LE_MRC_REG_HOME)

root@swi-mdm9x28-wp:~#

I will see about trying a newer release, I would rather avoid that as updating that in the field would be a hassle (especially if the connection has this issue)

6

do you try other SIM card?

Have you tried the R15 in leaf?

7

A different sim gave similar results.

The │ swi-wp77_6.0.0.beta │ SDK for WP77 (Release 15 + Legato 21.05.0) you suggested is giving the following error during install:

[1/6] Installing wp77-toolchain_SWI9X06Y_03.00.03.00-linux64
Run install steps for wp77-toolchain_SWI9X06Y_03.00.03.00-linux64
Configuring the toolchain for your environment, this may take a few minutes...
Error during installation: Error during install step for wp77-toolchain_SWI9X06Y_03.00.03.00-linux64 (command returned 1)
ERROR:
  Profile provisioning interrupted
CAUSED BY:
  Error during install step for wp77-toolchain_SWI9X06Y_03.00.03.00-linux64 (command returned 1)
HINT:
  try leaf profile sync to resume

Both in my current leaf profile and a new one I created just for this

8

you can see here:

you can also try sample application Modemdemo and see if only cm tool has problem:

app runProc modemDemo1 send --exe=send -- 1234567 "Online"