BC95-G high power consumption during PSM sleep

IoT Modules LPWA Module
1

Hi!

I’m trying to reduce the power consumption of the BC95-G to the stated 5uA in the datasheet, but the best I have got is around 677 - 680 uA. I enabled the PSM URC and I can see that it enters PSM successfully. Any ideas as to why it could be not working?

Here is the output of ATI:
Quectel
BC95-G
Revision:BC95GJBR01A07

2

After the BC95G registration network is complete, you need to run
AT+CEREG=5
AT+CEREG?

You need to output the AT log

3

This is the output I get:
`“AT+CEREG=5\r\n”

OK
“AT+CEREG?\r\n”

+CEREG:5,1,EACE,002A0A80,9,00000000,01000001

OK`

4

The power consumption in the hardware manual only represents the power consumption of the modem, not your PCBA

5

With the modem turned off, the power consumption of the PCBA is around 35uA. It is possible that I have not set the UART pins connected to the modem correctly, when putting the main MCU to sleep. I’ll look into this.

6

According to log analysis, BC95G can enter PSM, I suggest you can test the modem separately