During the Summer of 2013, I loaded Arduplane 2.74b into my APM 2.5. This being the default available at the time. I was also using the current Mission Planner at the time ( not sure which version ). In November 2013 I wanted to re create 2.74b in a second APM but found the current Mission Planner at that time had a problem with past firmware versions. As a result of a posting in DIYDrones last November, Mission Planner was corrected.
However the 2.74 version that recent Mission Planners now load is 2.74 and not 2.74b. I have tried running a range of Mission Planner versions from last Summer but these also now only show 2.74 not 2.74b
I have looked at firmware.diydrones.com and have found several .hex files relating to 2.74b. dated 16th to 19th July 2013. Should I be using the latest of these ?. Can anyone confirm this. Is this where Mission Planner gets it’s files from?
I have downloaded the source for 2.74b from the ardupilot-mega/downloads/list ( dated 15th July ) and even managed to compile it on Arduino IDE on one occasion (although I now get Arduino.h and other .h errors). I did however save the .hex file from this but has a size of 665 kb .The files in firmware.diydrones.com are all about 570 kb.
I am keen to re create 2.74b as after hundreds of flights have found it reliable and want to use a known program in a second bixler.