Car communication Protocol in Golang

###Cross compile to raspberry 1 (& 2?): env GOOS=linux GOARCH=arm GOARM=6 go build -v

###Cross compile to raspberry 3: env GOOS=linux GOARCH=arm64 GOARM=7 go build -v

[PC]# ssh-keygen -t rsa -b 2048 Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): # Hit Enter
Enter passphrase (empty for no passphrase): # Hit Enter
Enter same passphrase again: # Hit Enter
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.

Now copy your public key to the raspberry:
ssh-copy-id pi@RASPI_IP
[OR]
cat ~/.ssh/id_rsa.pub | ssh pi@RASPI_IP "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"