[WP7702] ULPM Led


I use a Mangoh Yellow with a WP7702 chip

Firmware + Legato:

root@swi-mdm9x28-wp:/sys/bus# cm info
Device: WP7702
IMEI: 352653090211897
FSN: 4L936370610310
Firmware Version: SWI9X06Y_02.35.02.00 5208b3 jenkins 2020/06/10 00:30:12
Bootloader Version: SWI9X06Y_02.35.02.00 5208b3 jenkins 2020/06/10 00:30:12
MCU Version: 002.014
PRI Part Number (PN): 9909138
PRI Revision: 001.001
Carrier PRI Name: SIERRA
Carrier PRI Revision: 001.036_001
SKU: 1104405
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 27 Unexpected: 0
root@swi-mdm9x28-wp:/sys/bus# legato version

When the card is in ULPM, if I move the card the D401 LED turns green, sometimes yellow for 1 to 3 seconds.

I thought the accelerometer was responsible for this problem because it pops up when I move the board and INT1 is tied to GPIO38 (one of the 2 pins to wake up the module in ULPM) but the current driver setup only uses the INT2 pin of the driver, which is linked to GPIO21 (cannot wake up the module if it is in ULPM).

Does anyone encounter the same problem? If so what was your solution?

Thank you for your time,


I found the solution to my problem:

I modified the accelerometer driver (BMI160) to disable the interrupt on INT2.
It seems to solve the problem.