GPS Bicycle Computer w/ ESP32, Speedometer, SD Logging

prusaprinters

<h3>ESP32 (Arduino) Based Bicycle Computer with GPS and SD logging</h3> <p>This is still work in progress but mostly functional this far.</p> <p>The code and mechanical aspects of the project definitely work well enough for a daily usage scenario. *Documentation isn’t available yet, I’d recommend anyone to start this project who already has a decent understanding of electronics.</p> <p>See the code for pin-definitions and / refer to the schematic in the pcb folder on GitHub*</p> <p>Quick overview:</p> <ul> <li>GPS Speedometer and other data such as altitude, traveled distance and time</li> <li>128x64 LCD</li> <li>RTC DS3231</li> <li>Temperature and Humidity Sensor HTU21D</li> <li>LDR for backlight adjustment</li> <li>Micro SD for logging your trips</li> <li>Charging over Qi Wireless charging</li> <li>One user-button</li> <li>2x 14500 LiFePO4 Battery</li> </ul> <p>Print the necessary files and build the circuit.</p> <p>Initially I planned for the unit to be recharged wirelessly by the bicycles dynamo generator. At least on my particular bike the output power was no where high enough. So I had to recharge the unit at home using a wireless charger powered by 5V. Keep that in mind when printing the files.</p> <p>For prototyping I recommend to use a small breakout-board for the ESP32: <a href="https://www.aliexpress.com/item/32972157302.html">https://www.aliexpress.com/item/32972157302.html</a></p> <p>This is the LCD I used: <a href="https://www.aliexpress.com/item/32956038705.html">https://www.aliexpress.com/item/32956038705.html</a></p> <p>LiFePO4 Protection Board: <a href="https://www.ebay.de/itm/12A-1S-3-2V-LiFePO4-Lithium-Iron-Phosphate-Battery-Input-Ouput-Protection-Board/263309495883">https://www.ebay.de/itm/12A-1S-3-2V-LiFePO4-Lithium-Iron-Phosphate-Battery-Input-Ouput-Protection-Board/263309495883</a></p> <p>Push Button Power Switch Board: <a href="https://www.ebay.de/itm/6A-Flip-Flop-Latch-Switch-Module-Bistable-Self-locking-Trigger-Board-LED-Motor/282381541189">https://www.ebay.de/itm/6A-Flip-Flop-Latch-Switch-Module-Bistable-Self-locking-Trigger-Board-LED-Motor/282381541189</a> alternative: <a href="https://www.aliexpress.com/item/32796080209.html">https://www.aliexpress.com/item/32796080209.html</a></p> <p>Qi Receiver Pad: <a href="https://www.aliexpress.com/item/32933478038.html">https://www.aliexpress.com/item/32933478038.html</a></p> <p>GPS: <a href="https://www.aliexpress.com/item/1872389528.html">https://www.aliexpress.com/item/1872389528.html</a></p> <p>Please note that the PCBs are still work in progress and contain errors.</p> <p>More info on my website: <a href="https://wizeus.de/">https://wizeus.de/</a></p> <p>See GitHub for the Code and other information: <a href="https://github.com/wilhelmzeuschner/esp32_gps_bicycle_computer">https://github.com/wilhelmzeuschner/esp32_gps_bicycle_computer</a></p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>Tronxy X8</p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div> <p><strong>Supports:</strong></p> <p>No</p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.2mm</p></div> <p><strong>Infill:</strong></p> <blockquote> <p>=15%</p> </blockquote> <h3>How I Designed This</h3> <p><strong>Fusion 360</strong></p> </p></p> Category: 3D Printing