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prerequisites:

• vscode/and python IDE
• raspberry pi with raspbian
• python 3.5 (usually comes with raspbian)
• git installed on raspbian
• IDE addon FTP-Simple so you can develop on PC and push to RPI
• account on https://www.cloudmqtt.com/ with valid topics configured

Devices

• raspberry pi zero w
• arduino car kit with 2 motors
• Dual DC Stepper Motor Driver Contro (L9110S)
• optional 5mp RPI camera

Circuit Diagram

setup

add a dev.json file with needed config or add environment variables on your PI

{
    "mqtt-host": "XXXXXXX",
    "mqtt-user": "XXXXX",
    "mqtt-pwd": "XXXXXX",
    "mqtt-port": XXXXX,
    "bot-move-topic-name": "bot-move",
    "WEB_PORT": 5000
}

RUN

ssh to your RPI and run from the relevant folder run sudo python3 .

optional (camera support)

• enable the RPI camera with the raspi-config utility
• connect the RPI camera (5mp/8mp)

sudo rpi-update # to make sure the v4L2 drive is available.