|The first prototype on the bottom, the new one on top.|
The other thing I built was the final version of the i2c RGB LCD backpack display. As a reminder, this is like the OpenEVSE display, but instead of just a SELECT button, I've included a 5 way tactile switch and a piezo element supported by the LiquidTWI2 "buzz" method. You can also change the i2c address of the GPIO chip with 2 way solder jumpers and you can change the common backlight pin from common cathode to common anode with another. In fact, this prototype is hooked up to a SparkFun RGB LCD display that has a common anode backlight. You just need to change an initialization constant in your LiquidTWI2 setup and it works exactly the same way.