Help with reading characteristic

[popeyesfx]

Hi
I have managed to get your lib working with node-red on a pi zero. I can connect to my peripheral. The issue I am having is how to read data from the characteristic on a regular basis. Once connected I only get the data once. I followed your demo for setup.

The unit I am interrogating is a Nasa BM1 battery monitor and it appears it only a read characteristics.

Any help would be appreciated