What MAX3232 adapter do you use exactly? According to the most popular pinout of MAX3232, Pin2 is V+.
Pin16 is TX of the buttons panel. It should be connected to the RX (RS232 side) of MAX3232 adapter. TX (RS232 side) of MAX3232 adapter you can connect to your LVDS adapter and configure VideoSwitch and AdapterVideoSwitch for controller_service (https://bluewavestudio.io/community/thre...l#pid12579) that will trigger switching video source of LVDS adapter.
In most cases MAX3232 connects to the Raspberry PI as follows:
TX (UART side) of MAX3232 -> UART TX of Raspberry PI
RX (UART side) of MAX3232 -> UART RX of Raspberry PI
VCC -> 3V3 of Raspberry PI
GND -> GND of Raspberry PI
Pin16 is TX of the buttons panel. It should be connected to the RX (RS232 side) of MAX3232 adapter. TX (RS232 side) of MAX3232 adapter you can connect to your LVDS adapter and configure VideoSwitch and AdapterVideoSwitch for controller_service (https://bluewavestudio.io/community/thre...l#pid12579) that will trigger switching video source of LVDS adapter.
In most cases MAX3232 connects to the Raspberry PI as follows:
TX (UART side) of MAX3232 -> UART TX of Raspberry PI
RX (UART side) of MAX3232 -> UART RX of Raspberry PI
VCC -> 3V3 of Raspberry PI
GND -> GND of Raspberry PI