A simple and small robot car using the well known yellow gear motors and wheels. It carries an ESP32-Cam monted on a pan servo. I used it to inspect my sewer pipes under the basement and up to the curb.

Based on esp32-cam-webserver by Owen Carter.

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YouTube video of inspection car in action

Additional Features

• Pan servo for the ESP32-Cam.
• Go fixed distances.
• Adjustable speed / power.

Features of Owen Carters version

• More options for default network and camera settings
• Save and restore settings
• Control of on-board lamps, rotate the view in the browser
• Dedicated standalone stream viewer
• Over The Air firmware updates
• Lots of minor fixes and tweaks, documentation etc.
• And 'reduced' by removing the Face Recognition features

Pictures of the robot car

Simple carrier glued to the servo	Connections at the TB6612FNG MosFet bridge breakout board
Details of the 3.3 volt LDO regulator assembly	Details of the antenna (from an old laptop)

Pictures of my sewer inspection

The situation	The reason for this project (gravel in the sewer)
The discovery	After cleaning
Impressions	Impressions
End of the 125 mm sewer after 6 m	End of the WiFi range outside after 2.6 m

Revision History

Version 1.0.0

• ESP32 core 3.x support.

Version 0.9.0

• Initial version.