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Access to Gill Windsonic Anemometer
We use the second serial port to receive data from the Gill Windsonic ultrasonic anemometer:
http://gillinstruments.com/products/anemometer/windsonic.htm
The Windsonic needs to be set up properly to send data periodically (every two seconds in my setup) in the Polar Format with fixed CSV sizes at 9600 baud.
I used a MAX3323EEPE to translate the RS232 from Windsonic to Merkurboard 3.3V levels.
The complete setup is driven by a 12V solar charged acid battery. The /power_supply ressource measures the voltage level on the input. The voltage is measured by a simple 1M/100k voltage divider directly connected to the merkurboard.
A small DC/DC converter is used to power the merkurboard.
Next step maybe put the merkurboard and MAX3323 in the Windsonic's case to have the first open source ipv6 addressable windsonic on earth ;-)