Tuya-Convert might not be possible for this device since the template was added (2020-07-26). All new Tuya devices have firmware preventing flash but it is still possible to Tuya-Convert old stock devices without connecting them to the Tuya app.
I didn’t enable shutter support because I don’t need. Can’t guarantee if this configuration works with shutter support.
switchmode1 4 # enable toggle first switch (first button) switchmode2 4 # enable toggle second switch (third button) pulsetime1 130 # 30 seconds of pulsetime for first switch pulsetime2 130 # 30 seconds of pulsetime for second switch pulsetime3 0 # 0 seconds for central button (pause) # IMPORTANT enable interlock for safety Backlog Interlock 1,2,3; Interlock ON