Adding extra functions to MinimOSD

I have started to add functions to MinimOsd code.

At first i did it for myself only. Added many functions i thought i need. Then opened this thread.

after a while, Pedro and later Miguel came, and things started to happen fast. :D

They have optimised the code and added even more things to it.

They have worked hard on CT, and it became a great tool!

Thank you Bough! :)

By now MinimOSD-Extra got a pretty advanced OSD.

Here it is in action:


- Changeable unit measurement (US, metric)

- Airspeed

- Home alt

- Battery Percent

- Battery used mah

- Current Draw

- Time From Startup (cleared at takeoff to show exact flight time)

- OSD Menu

- Variometer

- Wind horizontal speed and direction, and also the average wind speed of the last few minutes. 

- OSD on/off

- Switchable secound screen

- WP distance

- WP heading

- Crosstrack error

- Warning messages for Lost GPS fix, Stall, Overspeed, battery volt, battery Percent, RSSI

- Efficiency, glide distance & thermic notifier. 3 in one panel

- OSD Brightness

- HAM Call Sign

- After flight summary

- Trip distance

- Temperature

- Smoothened horizon

- Real heading


- Vertical speed

This functions can be turned on and off, and placed on different screens now, by the Config. tool.

Also RSSI, switching mode and channel and unit measurement, Stall speed warning, Overspeed warning, Battery warning volt, Battery percent warning, RSSI warning,  can be set in new Config Tool.

We built in a new way of setting video standards. Now OSD does not guessing anymore :). You can set it fixed from CT. It is in "Video Mode" menu.

Here is how it looks: (This video is a bit outdated, sorry. I will make a new one soon.)

The MinimOSD-Extra project is here: Link

This project is the developing version of the official Arducam OSD located here: Link

The latest stable version is: 2.2

The latest version can be downloaded from here: MinimOSD-Extra R800

Username: MinimOSD_Extra

Password: Top_Secret

CT is included. (The FW for Plane, Copter, Character upload and the character file is in the "FW & Char" directory inside CT directory)

We are sharing it to see videos you make using it! :)


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  • Can i ask you again, guys?

    It is possible to add CH6 realtime tuning value name and its current value, wile rotating RC TX knob in a flight? I think that it will be great for understanding PIDs and for fine tune stability using FPV (just look at my recent video :( it is shakely enought..

  • Good day!

    Just have tested latest firmware, everything is cool exept Home distance at startup. Can it be reset to ZERO after ARMING copter? Because the Home point stored in  a controler is OK, but the OSD Home position need  to be reset when Arming the board, can you agree with me? :)

    Thank you!

  • Hello,

    You can download the new firmware (still pre-release) and the new configuration tool here. This includes a small modification of Call Sign panel (now all letters are lower case) and also a new option to control characters brightness.

    Enjoy and please give feedback!


  • Hello,

    The new Call Sign is ready! You can download the new firmware (still pre-release) and the new configuration tool here.

    Enjoy and please give feedback!


  • Got the error fixed - somehow when I copied the libraries, I missed one of them. Thanks for making me go back and look one more time Pedro.

    I have gotten the changes made to both the Arduino and the PC code. My OSD has not arrived so I can't really test it out yet. As soon as it does arrive, I'll test it to be certain it works.

    The PC code is working, though I don't know if it will load the data to/from the OSD. As was pointed out by someone, you have to use a char array in the Arduino for the call sign (I suppose you could use the String library but I suspect there is not enough memory). In the PC, I just used a string that was converted when it went out to or came in from the Arduino.

    Pedro, I could send you the code for testing/correcting and, ultimately, release if you are interested. I marked the changes with //*** so they are easy to find.

  • Moderator

    Can someone clarify the setup for RSSI?

    1) Are all receivers able to deliver RSSI information? I have a Futaba R6208SB receiver.

    2) I'm not clear on which pin is being referred to here:

    'First you need to enable this function in APM. Go to APM_Config.h and add: "#define RECEIVER_RSSI_PIN 6"

    Note that 6 is the pin number where you have RSSI port connected. I have changed it to 6 as I use port 6. If you use a different port, replace 6 with your port number.'

    Is it the signal pin on the output side of channel 6? Or is it analog pin 6?

    3) Lastly, if you make the necessary changes and upload 2.65 via the Arduino IDE, can you still update the configuration with the Mission Planner?



  • How do I change:

    - Changeable unit measurement (US, metric)


  • Updated the first post.

    Also started a wiki page: Link

    I hope it is usable! :)


  • Thanks for all the work that has been done on this project. I am having trouble with the Arduino code for the OSD - when I try to verify it, I get the following error:

            In file included from ArduCam_Max7456.cpp:4:
            ArduCam_Max7456.h:77: error: expected class-name before '{' token

    There are several errors after this as well but it all seems to hinge on this error. I have tried Arduino 1.0.1 as well as the older 0100-relax version.

    Any help is greatly appreciated. I know I can just use the hex file, but I am wanting to add a feature - placing a radio call sign on the screen. I would like to make this an option instead of just hard coding it. I have managed to modify the C# code and have most of the necessary changes made to the Arduino code. I'll be happy to share when I get it all working if no one else has added this. I just don't know why I am getting the above error!

  • hi,

    this MinimOSD:

    is a copy?



This reply was deleted.


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