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
Yeah, no I didnt solder the jumpers. I couldnt find anything on it last night and for some reason when I went to the setup, it didnt show the option of bypassing the 12v. Im going to solder it when I get back to the school. I too, hacked my 3DR on the Uart cable with the 5v, rx and gnd. I think Ill be ok once i get the jumpers in place. How are you connecting via USB? Im assuming you mean through the actual usb port on APM? or did you cut up a usb cable and solder the wires?
Thanks alot guys.. I looked last night and that procedure and drawing wasnt on the google code I was seeing. Ill give it a shot.
Brenden, If its defective, will DIY replace it? even after I solder the jumpers?
Got a Question. I have hooked up my minim as pretty much every one here has described and the board gets power. I did not however, connect the 12V on the Vin Vout pins, and only have the ground and signal leads attached with the 12v completely bypassing the minim. Problem is, I dont get any picture. If I remove the OSD and plug the Vin and Vout together via a Y harness, I have picture. This tells me that something is up with the minim.. as usual. This is my second one, and Im really starting to get frustrated with it. I didnt want to plug in the 12v due to my last one bricking. However at least the last one worked for a few days. This one has give me nothing. Im really hoping someone can confirm or deny that I have to have the 12v wired through the Minim for it to work. Ive updated the firmware to 2.0, but that didnt help. Any Ideas?
After making the connections one thing that boggled me for a few hours was I received all zero's except for the flight mode I would set. Turned out you need to have the receiver side of the Telemetry module plugged in for the OSD to pickup the info otherwise you would need to plug into the TX wire.
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