CT Calibration selection from Pi2

[rupert]

I wrote some notes on connecting a Linux computer serial terminal to an emonTx4 via USB,
which may (or may not - I don’t have an emonTx5!) be helpful:

EmonTx4 Configuration by Direct Serial - notes

I wanted recently to alter the wireless node ID on my emonTx4. I had a few hiccups before I succeeded so I thought I would add some notes here for other Linux users. Altering the configuration of the EmonTx4 by using the serial port is documented at: https://docs.openenergymonitor.org/emontx4/configuration.html#using-the-web-tool It can be done by using the web tool, which requires a WebSerial compatible internet browser. I use the Firefox browser, which is not WebSerial compatible, so this …