I have an arduino connected to the uart of the pi. Then sending data as
<nodeid> <data1> <data2> etc...
I am using SerialDirect from emonhub to post data with http.
I read on this thread below that we can post ‘null’ values which act as if nothing is send on that channel. This is a feature I am interested in.
So on my serial string I tried sending ‘null’ hoping this would be translated and posted as is. However the SerialDirect just ignore the string stating it contains some non-numerical content.
Would you know a way to post null on a channel when using SerialDirect?