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:
That looks promising, check the scope for the signal on the output:
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:
And sure enough, openEVSE signals it's max charge rate to the car with a PWM signal at 1kHz:
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:
Where it should be counting the time it is charging.. not sure what is going on there..