[engolling]

Hello,

there are some good news with the laser distance measurement.
The following achievements have been made:

• Emulation of a HTU21D sensor
  
• Data is received in the RX station as extra sensor
  
• Unit is dm (deci meter) allowing a precision of 1cm up to a snow height of 100cm. (If the snow will be higher the value won't be displayed right on the display, but transmission to the weather station via davis protocol should go further).
  
• Setup height can be stored in EEPROM in setting the Pin int0 to GND
  
• The value (setup height - measured height) is transmitted to the RX station
  
• A running median filter is put in place to smooth the readings
  

The following features are planned to be integrated:

• Support of two other laser ranging devices
  

Know issues:

• Since the ordering hand was faster than the brain there is a routing error on the PCB. Instead of A4 and A5 the pins D4 and D5 are routed to the I²C connector to the TX module. Therefore some extra wires have to be soldered to the PCB. More explanation will follow soon.
  

Last but not least you can find the actual software attached. I know it is not very nice - this have never been my strengths but I will try, as soon as I'm satisfied with the functionality, to improve the Software that it will be clearer.

@ JT118 - thanks for the information.

Greetings, engolling