The UD18 can communicate via Bluetooth. To use it in node-red custom projects we need:
- the communication protocol used by the device (see UD18_protocol.txt )
- node-red nodes to code+send commands and receive+decode data (see UD18flow.json ).
For the full story see UD18_01_en.pdf (in italiano: UD18_01_it.pdf) on github.
Best regards, m.s.