I am trying to follow TCIII instructions for how to connect dual sonars to a PIXhawk. First of all in MP the sonar options are gone and now we have RANGEFINDER. According to TCIII the pins are 12 and 13 ( 3.3 v ADC) but the MP wants to use pin 15 ("airspeed") !
Which is correct ? I put in pins 12 and 13 but no signal. I can confirm I have analog voltages on the pins ( 0.6 to 3.3V)
Actually I have made a pseudo-sonar. I found the Maxbotix sonars are too slow and need to be triggered properly to avoid interference. Instead I took a Hokoyo laser rangefinder and used an Arduino DUE to output 2 analog voltages corresponding to obstacle distance left and right of the laser rangefinder. Then I could just feed these into the PIxhawk and use the built-in obstacle avoidance routines.