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Here is how it looks: (This video is a bit outdated, sorry.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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Hi, thanks for all your work. I have a semi working OSD and am waiting to getmy programmer back off a friend to test futher. But i do what you say.

Use latest CT

Power osd on both sides

upload charcter uploader firmware

upload characterset

upload copter (from the lastest link)

And I dont think i have ever had a character set take on two different minim osd

Like i say i edit character sets that work and yet when i "upload" the new character set there is no change what so ever so i canonly assume the last firmware was left.

Not sure how to debug this problem

However all in all the osd is very very good!

I look forward to seeing your board.  Any idea when you should have something worth putting out there?


PS. If you want my boards (I think I have 6 of them), just send me a message with mailing details and I'll send them your way. Not sure if they are any good, but you are welcome to play with them.

Hello Gabor

OK tried this have already downloaded and unpacked R800.

Started R800 CT

Uploaded character uploader firmware

After that Powered both sides of the board (LED each side lit)

Then ran in new characterset using button under option

Uploaded plane firmware

Screen still not correct with latest firmware

Question for you do I need to power both sides of the board before I upload the character uploader firmware?

Does this indeed load the characters with no need to run the character upload sequence after that?

As you made no mention of that in your reply



No for FW upload it is not needed.

Are you using a 6 pin FTDI?


Yes I have Sparkfun FTDI with 6 pins.


Hi Doug,

Check the first post. The one you have linked is not MinimOSD-Extra.

It was yers ago.

Also for wiki: Link

It is sad it did not work for you.


Hi Luis,


I will have a look!

Glad you started with our code! 


Robert, Hally

Write me a pm.

I will help you.


Is this a specific character set that you're wanting to use? If so, where did you get it and which one?

I have been following the various RCG threads and found that with the newest firmware for plane, one of the charsets don't work quite right so I just gave up on them as there were others I preferred anyway.

I don't use a 3DR board but a different variant and what worked for me (after reading various threads everywhere and copied here) is:

  1. Power BOTH sides of the board!
  2. Open CT, upload the proper character updating firmware
  3. Select read from OSD and blank both screen 1 and screen 2. That is de-select everything. Save each screen as a blank to the OSD.
  4. Exit, power off of everything (don't know if a simple reset does the same thing)
  5. Re-power (both sides!) open CT, select read from OSD. Make sure screens are blank.
  6. Update Charset
  7. Update firmware to the newest version for plane
  8. Configure screens, save to OSD

How necessary is it to clear out the screens first? No idea but it worked for me first try.

I'm curious about the new firmware from Luis. I'll have to take a look at that.

Hi healthy am not really fussed which character set I use as long as it works for me and displays all the new modes etc correctly on my screen.  Do you know of others that its possible to use?


I like Tiny and Digital that you can see here.


I'm using tiny as it maximizes the video I can see but I really like the look of digital as well. Give one of those a try. I believe char sets need to be updated to match firmware from what I have read but I could very well be wrong. It seems that sometimes, there are updates required as some characters get out of date and some new features require other characters. Give those a try.

Hi Gabor,

Its not based on your code. It's written from scratch and doesn't use "arduino stuff".

Only some of the widgets (called panels on minimosd-extra) are based on your code (like the horizon).

Anyway, still some work to do on my FW...

Most important is to make it user friendly, meaning: create tool to configure it.



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