MBP to Serial Port (mini UART on Raspberry Pi)

Cable is the most Important thing, pick a USB to TTL RS232/UART Serial Converter Adapter

FTDI FT232RL Chip USB TO TTL RWS232/UART

Enable UART in Pi

Option 1: using config

$ sudo raspi-config

Select “Interface Options”

select “I6 Serial” option.

Select “No” to the question “Would you like a login shell to be accessible over serial”?

Select “Yes” to the question “Would you like the serial port hardware enabled?”

Exit Save and Reboot Pi.

Option 2: Edit files

$ vi /boot/config.txt

Add enable_uart=1 in [all] section

Disabling the Serial Login Shell

$ vi /boot/cmdline.txt

find and remove this part
console=serial0,115200

Monitoring UART port in MBP

using SerialTools from App Store or CoolTerm from CNET

SerialTools

CoolTerm