Tiny Tim
This is a small 4-wheel drive robot with Mecanum wheels.
The robot uses my Motor Board v2 - ESP32 Motor Board as the brains.
Components
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1x ESP32 D1 Mini Nodemcu microcontroller
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2x Adafruit DRV8833 motor drivers
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some male / female socket headers
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2.54mm 2-pin screw terminal
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some 3M spacers and screws
Construction
Cad files for the 3D printed parts are available here. It was made in Fusion 360 and consists of three parts:
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a motor plate where the motors are screwed on
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a battery holder plate which gives some support to the battery pack
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an adaptor to screw on the PCB
Between the parts, spacers are used.
notes
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GPIO0 for X motor does not work when powered over USB (unless serial connection is made over it), due to wiring of CTS, DRT stuff. Powering over 5V pin works fine.
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combination of PS3 Controller and Wifi libraries resulted in too much Flash memory being used for default partitioning. Using huge_app.csv partition table in platformio file solved this.
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goes too slow now in translation mode
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whines when stationary, better stop the motors when detected that they are going too slow
