Get the latest OS here: https://www.raspberrypi.org/downloads/raspbian/
Mount the SD card on your computer. You should see a "boot" volume
Create an empty text file named ‘ssh’ at the root of Volumes/boot
sudo vi /Volumes/boot/config.txt
At the bottom, last line, add enable_uart=1 on it's own line
In the same file, /Volumes/boot/config.txt
Uncomment the line that contains dtparam=i2c_arm=on
Create a file named wpa_supplicant.conf at the root of /boot
The contents of this file should look like this:
country=US ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev network={ ssid="your_network" psk="your_password" key_mgmt=WPA-PSK }
Put the microSD card in the RPi Zero W's reader and power on the RPi.
SSH in to your RPi via your terminal ssh pi@raspberrypi.local
Password should be the default password for the pi user.
Install these files to get all the tools you will need to build and run the missing_link binary.
sudo apt-get install cmake git libconfig++-dev libconfig++9v5
Install MIDI support libraries
sudo apt-get librtmidi-dev
Clone the git repo in your home directory
cd ~/
git clone https://github.com/CircuitHappy/missinglink.git
sudo cmake -Bbuild -H.
sudo make -C build
Run the binary sudo ./build/bin/missing_link
Note: missing_link binary is expecting to talk to an LED driver, LED display, and GPIO expander over the i2c buss. You will have to disable some of these dependencies if you don't have those wired up to the RPi Zero W.