Control to Start Taking Photo

Flutter Example:

/// Event number for starting to take a photo (app -> ble)
photoStart(
  evtBase: _VBusEvtBase.base_app_set,
  evtType: _VBusEvtType.app_app_to_ble_photo_start),

/// Start taking a photo (app -> ble)
libManager.send(evt: CmdEvtType.photoStart, json: jsonEncode(json));