Thanks for the clarification, sorry to show my ignorance. Indeed I meant javascript 
So, let me know if my logic has left the building.
My conductivity chip is at address 100, looking at the documentation for the chip I need to send the command 'R' to address 100 to get a reading back. I cannot insert anything but numbers into the command box in the 'i2c in' node. My only guess is that this is ASCII, so an 'R' would be 082.
However when I use 'node-red-contrib-i2c' to send 082 to address 100 I get 255 returned, which is code for no data to send.
Also, most of the commands are multi-character and the input box only takes 0-255.
I think I'm missing something here, but c'est la vie
