I just need to do it to calibrate the emontx! I need want to connect to the emontx to see the readings in real time and make the needed adjustments, upload the new firmware with the calibrations.
At the moment I have the 9v AC-AC for sampling and the 5V USB powering the EmonTX (I need the 5V because I use the EmonESP, and the 9V AC-AC is not able to power the EmonTX and the EmonESP, as stated in the Wiki). Now I see that I should have removed the JP2 to do this… Never had any problems… But its better to remove it… Correct?
So If I get you right. My connection should be, 9V AC-AC, the FTDI in the serial and remove the JP2 jumper… I should not connect the 5V USB when with FTDI connected.
Thank you, and sorry if some of my questions sound like “noob in the house”.