APM 2.5 plus the 3DR radio telemetry works great, now I want to add my MinimOSD board.
The MinimOSD board reads MAVLink messages from its RX pin and request rates from APM on the ArduPilot "telem" port. (Port 0 implied). The APM2.5 board 3DR radio connector (UART0/2) pin out from the board edge counting inward is: Gnd, (blank) RX, TX, +5V.
The MinimOSD Introduction has a diagram which states APM telemetry port (pins sequence from bottom) (shows bottom of block diagram of Port) This presumes that it is also board edge of back of APM2.5 and shows (APM pins) counting inward as: Gnd, (space) +5v, out, in. (out to rx of OSD, in to TX on OSD). The silk screen on the APM2.5 is clear, and I believe +5v is the most inside (away from edge) pin of Port 0. Should I just wire my OSD up based on what the APM says about Port 0 pins?
Is the diagram in MinimOSD introduction wrong on its cabling to APM telem port?
I am eager to add my MinimOSD to my build, but do not want to fry or brick my OSD.
Hope this helps someone in clearing this up somehow.
It would have been handy to have had another connector like 3DR for the feed to the MinimOSD.
In the meantime I guess I just hack into my 3DR cable or solder to tiny pins on back of APM2.5.
Replies
Hi guys, here is another one
http://www.ebay.com/myb/WatchList?_trksid=p2057872.m2034.l3387
I have this and confirm it works well masha Allah. No need for any custom universal cables :-)
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Hi guys, I was wondering if anyone has tried the radio and minim cable that are available from 3DR and also from the net? I have used them and even hacked one to work with the new radios from 3DR, which can work with android mobiles and tablets via droidplanner etc, that way I can move the radios in between my discovery (APM 2.5) and my fortis titan (Pixhawk).
The cables are even labelled for radio and osd.
They look something like this
http://store.3drobotics.com/products/telemetry-slash-osd-y-cable-ad...
also explained here
http://copter.ardupilot.com/wiki/common-minim-osd-using-with-a-grou...
What is your problem? This is rather simple circuit.
Of course you have to set correct SR* params:
https://code.google.com/p/minimosd-extra/wiki/APM
I'm seeing the same issue with zero data on OSD. Data out from the APM telemetry port goes via Y to both the radio and the OSD data input. When the telemetry radios are connected the flight data appears correctly in Mission Planner or APM Planner. The OSD data LED is blinking in sync with the telemetry data. However, all the flight data is showing as zeros on the OSD display (there is a clock counting up). Any suggestions? Thanks!
Pair radios first. You will go no further without that.
If you don't have SOLID green LED - there is no reason to try to connect to APM.
If you're sure about params - I suspect hardware failure, try to replace radios.
Beside this - hot glue on antenna connector isn't good idea...
Are you sure you have same settings on both units? Show printscreens for both just after successful "Load settings".
Once you have it all hooked up hit the reset button on the OSD board, Im running the HKpilot mini 2.5 on my plane.
Heres my set up
Can someone provide the primary advantage for running MinimOSD in parallel with the 3DR telemetry data? Ideally you would have video coming back separately and combined at the ground station with the HUD. My 800mw 1.3 Ghz video link has better range than the 3DR telemetry link, so one reason to run both is that you might be out of telemetry range but still have a video link. Is that the only reason or are there other reasons?
Thank you.
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