I am busy looking at DS1990A Serial Number i-buttons. My test hardware is running on a Pi W and node-red 3.0.2.
I see there is a # node-red-contrib-1wire node that supports the 1-wire DS18B20 temp sensor.
Do you use this node to read the DS1990A as well or is there a different node that support DS1990 specifically? I cannot seem to find anything on google.
Thanks any comments or pointers will be appreciated.
This is the first I have heard about this device and if you can't fined anything with Google (neither could I) then you are exploring uncharted territory.
So give it a try and see what you get. Make sure to add a catch node connected to a debug node (set to display the complete msg object) to help look for problems.
If you have code for an Arduino, and have MQTT on your network, you could try using a Wemos D1 Mini and have it read the device and then publish the data to your MQTT broker and use an mqtt-in node to subscribe to the voice to get the data into NR