More info: https://hackaday.io/project/163542-esp32-wifi-robot
Code on Github: https://github.com/CoretechR/ESP32-WiFi-Robot/tree/master
Video: https://www.youtube.com/watch?v=NSowf_ctzAw

The ESP32 WiFi robot is a shrunken-down version of the ZeroBot (https://www.thingiverse.com/thing:2800717). Instead of a Raspberry Pi, it is powered by the similarly popular ESP32. Despite its lower processing power, the ESP32 robot has a ton of features. It streams color video over WiFi, runs on a small LiPo battery and can be controlled accurately from any web browser. With the 4€ Esp32 and a 3€ camera, it's also really cheap.

Print the two shells with the inside facing the print bed. You will need to include a lot of support material. Simplify3D works best for this, but Slic3r or Cura with optimized settings should be fine as well. I used support with lower density for the most part and higher density for the last 8 layer up to the part. This saves a lot of filament.

The tires should be printed with Ninjaflex or something equivalent to ensure good grip.

Everything else can be printed in PLA.