AMW037 UART Rx line unexpected pulled to low on
Dear Tech support,Show more
During web setup mode, an unexpected <0> data appear within the WIFI module caused it to exit web setup mode and reboot after 8 secs .
HAL_UART_Transmit(&huart2, websetup, 10, 50);
After which, the STM32 MCU will delay 61 secs to give time for the user to key in wifi password. The timeout time is 300 secs as according to Gecko OS guide:
Logic analyzer picture 2: After 8 secs, there will be a 0 appear on the Rx line and pull it too low. This causes the chip to break out of web setup mode as it reboot itself to rectify the pull low issue.
Can anyone help answer what caused this mysterious 0 to appear why it pulled the AMW037 Rx line to low? Thanks
Jan 10 2019, 7:02 AM