9

FORGE

Upgrade your humble letterbox with push notifications

Left

The complete wiring

setup. The ends of

the bell cable are

stripped and fit nice

and snugly into two

female DuPont cables

connected to the Pi

Zero’s GPIO pins

YOU’LL NEED

Raspberry Pi

Zero W (ideally

with a pre-soldered

header)

Mini HDMI lead

or adapter

USB hub to plug

into the Zero’s

micro USB port

(for keyboard/

mouse)

Magnetic contact

switch (door sensor)

Long length of

bell cable

2 × DuPont cables

(female/female)

Long USB power

lead for the Pi

A smartphone

or tablet

A Google account

(free)

An IFTTT account

(free)

Glue gun, or other

method of fixing

Adhesive Velcro

strip (to mount the

Pi Zero)