I’m afraid so.
And you’ll need to install the Arduino IDE to compile it. (Platformio screwed up my system - I cannot advise it, nor support you if you use it.) All the instructions are in ‘Learn’.
Learn→Electricity Monitoring→Using the Arduino IDE
Learn→Electricity Monitoring→Programmers→FTDI Programmer→FTDI Programmer
It’s compiled, runs for me with 2 sensors, see how it goes and report back if there’s a problem.
EmonTxV3CM6T.zip (12.9 KB)