I2C error after installing WiFi IOT card


#1

Hi,

I recently got the WiFi IOT expansion card for my MangOH Red with a WP76. I was following the installation procedure outlined here WiFi expansion card tutorial when in the middle of the ssh session the device disconnected. I haven’t been able to connect to device at 192.168.2.2 since then. Looking at the console log, I see this error in particular that is recurring every few seconds

[ 685.894503] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:14) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090

Here’s the cm info output

Device: WP7603-1
IMEI:
IMEISV: 4
FSN: WD752585250210
Firmware Version: SWI9X07Y_02.16.02.00 000000 jenkins 2018/04/19 19:59:02
Bootloader Version: SWI9X07Y_02.16.02.00 0000[ 54.486640] i2c-msm-v2 78b8000.i2c: NACK: slave not >responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0
00 jenkins 2018/04/19 19:59:02
MCU Version: 002.009
PRI Part Number (PN): 9907595
PRI Revision: 001.004
Carrier PRI Name: GENERIC
Carrier PRI Revision: 002.032_000
SKU: 1103727
Last Reset Cause: Power Down
Resets Count: Expected: 49 Unexpected: 1

I tried reflashing the firmware on the device but swiflash does not detect the target.