One of the things that would be nice to add to the firmware is the ability to dynamically calibrate the wind vane voltage level data. There's a lookup table in the firmware that's based on a single instance of the sensors and it's oriented "just-so" on my house. In order to use the firmware, each instance would need to calibrate it for their orientation and tweak any voltage readings to match the directions. It would be nice to perform this process through the serial port of the AVR MT 128, then store the results in the EEPROM of the device so you would not need to reprogram the device in order to adjust calibration settings.