Servers by jDrones

New APSync Build for Raspberry Pi

As part of a different project, I’ve built a new APSync for the Raspberry Pi. It’s based on the latest Raspian “Buster”, so should work with all models of the Raspberry Pi.

There’s a few minor issues (see here, plus there’s no DFLogger), but mostly works very well.

My build scripts are over at Github, for those that want to build it themselves.

The disk image can be downloaded from


@stephendade Thanks for sharing the image. I tried flashing it on a Raspi 4B. Is this apsync image a command-line only version of Raspian? I am not seeing any GUI even after logging in.


The APSync components are configured as systemd services, so will start automatically on boot.

Thanks! I was able to establish MAVLink but the connection is very erratic. It takes a moment for the link to connect and then it says Link1 down intermittently. Also, I’m getting a lot of junk data. I have the advised baud rate of 921600. Any idea what the problem could be?

Also, what is the user name for apsync? apsync & apsync isn’t working. I am using pi & raspberry as the user login details for now.

That’s the correct username/password. I’ve kept the Raspian defaults.

Are you using MAVLink 1.0 or 2.0? Try switching and see if that helps.

I have tried both and tried TELEM1 and TELEM2 ports of Pixhawk. Similar response on both.

For those looking for documentation on my build, I’ve now got a site with a user manual:

Servers by jDrones