HI Dfrey,
Thanks for reply. Will reply after checking the same .
In between I have one query about Hardware setting of mangoH Red board IOT connector (CN306) SDIO signals. .
It seems IOT connector SDIO data signals are connected to UART1 control signal (DTR/DSR/DCD/RI) of Wp76XX module (J200) .
Did you isolate those SDIO signals from UART1 port control signals while do testing WL1831 based IOT WiFi card . There is an option to isolate with resistors (R584 to R587) .
Regards
sg001