Raspberry pi zero Scanner

Things you need

Raspberry Pi Zero (1-7 pieces)
Raspberry Pi Zero camera V1 or V2 (1-7 pieces)
L298N Stepper controler
Bipolar Stepper motor NEMA 17
Power supply 12V 10A (for motor and LED)
Power supply 5V for RPI and cameras

5mm Flange
some M3 screws and bolts

Step 1 connections

This is the Fritizing schematics. I hooked the L298N controller to GPIO of the Master Pi Zero  23 and 24 for the A coil and 4 and 17 for the B coil.
Other R Pi’s (Slaves) talk to to the Master via WiFi. Make sure you are using the ones that support it.

Step 2

Burn the ISO images to the SD cards for each R Pi Zero.
You only need Lite (headless) version and I use balenaEtcher to do the process.
You can download it HERE.

Step 3

Setup wireless access to the R Pi’s using SSH and PuTTY.
You can find the guide here

Step 4

Install Python libraries if you don’t have them

Enable Cameras

Make sure you can take photos using R Pi camera on all the Raspberry Pi’s; test using the command

raspistill -o Desktop/image.jpg

Step 5

Assign static IP addresses to your R Pis.
You can find instructions here
In my case these are:

master = “192.168.0.90”
slave1 = “192.168.0.91”
slave2 = “192.168.0.92”
slave3 = “192.168.0.93”

Step 6

Load up m.py to you Master Pi Zero and s1.py through s3.py to each of the slaves.

Run slave python scripts first and wait for the confirmation.

Run the master script to control them all!