I now have the firmware working to read the DS1820 temp sensors and battery voltage and print the vaules on the arduino serial monitor.

This doesnt seem like much and could have just used one of the example files of the net but that would not integrate nicely with my next step of sending the data to my MQTT server via wifi.

A point of interest when designed the board to hold the NodeMCU module I mistakenly caluclated the resitive divider network for the Battery monitor believing that the NODEMCU had a 1V ADC input as per the ESP8266 but the NODEMCU board already has a divider built in to allow the Ain to read up to 3V.