/ EV

Bench testing my openEVSE

It is time to bench test my Arduino openEVSE. So I uploaded my version of the firmware onto it and waited for the bootscreen. And sure enough:

IMG_20190611_171415

That looks promising, check the scope for the signal on the output:

IMG_20190611_171835

That is also to be expected, openEVSE does not detect a car so is doing nothing. I simulated a connected car with a resistor, like this:

Capture

And sure enough, openEVSE signals it's max charge rate to the car with a PWM signal at 1kHz:

IMG_20190611_171915

And switches on the solid state relay to start the charge (this can be seen in the photo with the resistor)

AWESOME... but.

The display now displays this:

IMG_20190611_171928

Where it should be counting the time it is charging.. not sure what is going on there..