Good day. Thank you for your question.
There are no specific door sensors or weight sensors that we can recommend as FMB640 does not support Bluetooth functionality. However, you may use the Manual CAN IO to determine the weight. Please refer here for more information - https://wiki.teltonika-gps.com/view/FMB640_Manual_CAN_IO
. Alternatively, you may use sensors which has analog input interfaces where the weight is determined by the voltage value if calibrated,
Regarding the door status, it can be detected by digital inputs by using sensors that give a signal if the door is opened or closed. If the sensors are giving out 0 or 1 values, then it supports a digital input interface and can be used for this feature.
Hope this helps.