https://bellergy.com/6-install-and-setup-mavlink-router/
https://ardupilot.org/dev/docs/raspberry-pi-via-mavlink.html
install dulu gak sih
https://github.com/mavlink-router/mavlink-router
follow up until
sudo ninja -C build install
Create mavlink-router config file
cd ~
mkdir /etc/mavlink-router/
cd /etc/mavlink-router/
sudo nano main.conf
Here is an example of main.conf
[UartEndpoint serial0]
Device = /dev/ttyACM0
Baud = 921600
FlowControl=false
[UdpEndpoint local0]
Mode = normal
Address = 192.168.18.255 # broadcast address of local subnet
Port = 14555
PortLock = 0
[UdpEndpoint local1]
Mode = normal
Address = 192.168.18.255
Port = 14556
PortLock = 0
Adjust serial port parameter

set protocol to mavlink2 and baud to 921, serial port depends on which port you’re using
Launch mavlink-router
sudo mavlink-routerd -c /etc/mavlink-router/main.conf -v