Is anyone successfully using an analog Maxbotix sonar rangefinder on the PH2.1...specifically on the ADC port?
Currently maxbotix I2C units cannot be used on the 2nd I2C bus and I was not keen on cutting into my Here GPS cable, so I ordered the MB1240 analog unit and wired it for the ADC port per the instructions at http://ardupilot.org/plane/docs/common-rangefinder-maxbotix-analog.html
Using the params as instructed I saw no response in the sonar voltage. I tried changing the pin to 15 and manually adjusting the scaling. This resulted in accurate response from the unit but only up to approx 1.5m. I'm running Arduplane 3.7.1 and the most recent Mission Planner...although I temporarily flashed my PH2.1 with ArduCopter and had similar results.
I did separately test the sonar with a regulator and multi-meter to make sure it wasn't faulty...seemed to be working fine.
I have analog sonars on legacy Pixhawks that work, which is why I'm asking this in the PH2 section rather than plane. Thanks!