I have a Canon S100 with CHDK, the E-flite EFLA600, Sparkfun step-up board and this cable http://www.kapshop.com/p274/Canon-11-pin-for-CHDK/SDM-and-Video-out/product_info.html
I have soldered and connected to Pixhawk. I can measure 3.3v pulses from the output pins of the Pixhawk.
The camera will fire when I disconnect the main Lipo battery. But I can’t get it to fire from Mission Planner.
Any idea how I can troubleshoot this?