ESP32 Ninja is a ultra-small (29 x 37 mm), high-quality, 4 layer ESP32 IoT development board. It hosts all the hardware you may need in an tiny form factor in order to be used in custom IoT applications, primarily as a temperature and humidity node.

The project started as a challenge to build the smallest development board out there that supports USB UART and USB OTG interfaces, and is also packed with solutions for the most common issues a hobbyist or a researcher might deal with when tinkering and prototyping a new project, especially around IoT.

ESP32 Ninja can be a completely independent IoT node, giving feedback via the RGB LED or add-on OLED screen, while being able to accept input via two onboard buttons. It is designed with power and portability in mind with an ultra-low power mode and lithium polymer battery support, with a BMS (Battery Managment System) and a SoC (State of Charge) IC.

Features & Specifications

• Wi-Fi IEEE 802.11 b/g/n-compliant
• Xtensa® single-core 32-bit LX7 microprocessor
• 128 KB ROM
• 320 KB SRAM
• 4 MB FLASH
• LiIon / Lipo battery support - TP4056
• LiIon / Lipo fuel gauge for accurate SOC estimation - MAX17048G
• Easy OLED screen interface - direct I2C interface
• Two onboard touch buttons (upgradable to hardware push-buttons)
• Sensirion SHT30 temperature and humidity IC
• RGB LED for IoT feedback - WS2812B 2020
• USB Host
• Low power consumption
• 4 layer board (better signal integrity)

Open Source Hardware

Our open source files, including hardware schematics, can be found in our public Github Repository.

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