PSM power down during firmware upgrade

IoT Modules LPWA Module
1

Hi,

When I upgraded the firmware with the DFOTA a few months back, it all worked fine. But now, when I am trying to upgrade to the new firmware (01.200.01.200) it appeared to be stuck. But when I read out the communication line of my uC to the BG96, I see that the PDP context suddenly gets deactivated and the device goes into psm power down and then I looks like it just reboots. I don’t have the PSM mode activated.

Here the data recieved from the BG96:

+QIND: "FOTA","UPDATING",18%
+QIND: "FOTA","UPDATING",19%
+QIND: "FOTA","UPDATING",20%
+QIND: "FOTA","UPDATING",21%
+QIND: "FOTA","UPDATING",22%
+QIURC: "pdpdeact",1
PSM POWER DOWN
+QIND: "FOTA","UPDATING",23%
RDY
APP RDY
PSM POWER DOWN
RDY
APP RDY
PSM POWER DOWN

AT+QFOTADL=“filelocation/file.bin”<\r> is the last command I sent to the BG96 and I am sure there is not a different command sent after that.

What can cause this?

Kind regards,
Jeroen

1 Like
2

Now the device can also send AT commands, if you can use AT+cpsms? Check whether psm is enabled.

3

Ah yes, I did exactly that and then to my surprise I found out that the PSM was enabled, so I already have found the solution. But I still wonder why it was enabled in the first place, because the default should be “off” according to the datasheet or am I missing something?

4

It’s off by default. Maybe you’ve turned psm on before and left it on.