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Back to School with STEM-Limited-Time Event(Aug 6-Sep 5)
Back to School with STEM-Limited-Time Event(Aug 6-Sep 5)
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The CYD 2.8" ESP32 Marauder/Bruce Battery Upgrade Kit is a solderless mod that adds LiPo battery support, I2C battery status, and GPS capability to supported CYD boards (ESP32-2432S028R only). It includes a custom PCB, GPS antenna, wiring, but does not include a battery. Compatible with both Marauder and Bruce firmware (note: Bruce lacks I2C battery status), it’s designed for users who want an easy, plug-and-play upgrade. GPS requires outdoor line-of-sight to function properly—don’t expect a lock indoors.
Will not work with the Capacitive CYD versions. Those end in C not R. Purchase the R version. You can flash 1.6.1 here
Marauder Firmware
Don't want to mess around with soldering battery leads and GPS modules? Neither did I. This mod chip lets you add a LiPo battery, battery status over I2C, and GPS to your Cheap Yellow Display with zero soldering. Works out of the box with the ESP32 Marauder and Bruce Firmware.
Note: The battery is not included in this kit. Please refer to the battery links below.
Any 3.7V lithium battery with a JST 1.25mm connector will work. If you need help finding one, here are some links! Verify battery polarity before plugging in! (Red is +, Other is -) MAX BATTERY SIZE 5.6cm x 3.5cm x 1cm for my case
Follow step-by-step instructions with ease! Watch the YouTube Tutorial
Want to print your own case? No problem! Download the Case 3D Model
This kit is designed with accessibility in mind—no soldering required, making it approachable for all skill levels. The custom PCB eliminates the hassle of complex connections, soldering, and researching. If you don't like soldering battery leads, you'll appreciate this upgrade.
I hope you enjoy this mod as much as I enjoyed creating it! If you have any questions or need support, feel free to reach out.
GPS isn’t working?
If you have trouble with GPS locking, you’ll unfortunately have to leave your dank crypt you vampire. Cell phones have spoiled us by making us think GPS should always work indoors when really a phone is using a combination of cell tower triangulation, WiFi, and GPS antennas to acquire your position. That cell phone technology is A-GPS. This board is purely GPS and for it to work, it needs an unobstructed view of the sky. It can work in a car though! It’s the same story with fancy Garmin GPS trackers too. So go outside! (Yes you can wait until it’s dark ????♂️)
