V0 2 NAU7802 breakout board
About the V0 2 NAU7802 breakout board
V0 2 NAU7802 breakout board is an open source ESP32 PCB design by MacNite, published on GitHub under the MIT license. It is a 2-layer board measuring 74 × 105 mm, with 20 components from 11 distinct parts.
Its main chip is the 113991254, from the ESP32 family. By type, the board carries 6 connectors, 2 resistors and 1 transistor.
It belongs with the iot & wireless, sensors and power & battery designs in this gallery.
From the project
Open-source ESP32-C6 beehive monitoring hub for scales and sensors. Collects weight, climate, sound, vibration and bee traffic from up to 16 hives, with BLE, OTA, FastAPI/PostgreSQL backend, dashboards, MQTT and tested KiCad hardware.
Current state (as of 9 July 2026): all published PCBs are tested and working.
- Use the XIAO ESP32-C6 on the Scale Module (V0.4) as your main HiveHub controller, populated with the recommended module set: NAU7802 (2 scales), MAX17048 battery gauge, TPS63020 buck-boost, TP4056 USB-C charger, DS3231 RTC, micro-SD module and SHT40. It also collects data from up to 16 BLE in-hive sensors. - Optional, for 3+ scales: add the NAU7802 breakout PCB (v0.2) without an MCU — its TCA9548A I2C multiplexer carries up to 8× NAU7802 for up to 16 wired scales in total. When the breakout/mux is used, install…
V0 2 NAU7802 breakout board bill of materials (BOM)
20 components, 11 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Q_PMOS_GDS | TO-220-3_Horizontal_TabDown | Q1 |
| 1 | TCA9548A_L | PinSocket_1x12_P2.54mm_Vertical | J1 |
| 2 | TCA9548A_R | PinSocket_1x12_P2.54mm_Vertical | J2, J6 |
| 1 | Conn_01x02_Pin | TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J3 |
| 1 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | Conn_01x05_Pin | PinSocket_1x05_P2.54mm_Vertical | J5 |
| 8 | NAU7802 | NAU7802 | NAU7802-1, NAU7802-2, NAU7802-3, NAU7802-4, NAU7802-5, NAU7802-6, NAU7802-7, NAU7802-8 |
| 1 | Conn_01x04_Pin | TPS6020 | TPS63020 |
| 1 | 113991254 | MODULE_113991254 | XIAO_MCU1 |
| 1 | Conn_01x04_Pin | PinSocket_1x04_P2.54mm_Vertical | i2c1 |
| 2 | R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R100R1, R100k1 |
V0 2 NAU7802 breakout board design files
The KiCad project lives in the MacNite/HiveHub repository on GitHub; these links point at the commit this page was built from.
V0 2 NAU7802 breakout board: common questions
What microcontroller does the V0 2 NAU7802 breakout board use?
The V0 2 NAU7802 breakout board is built around the 113991254, from the ESP32 family.
How big is the V0 2 NAU7802 breakout board?
The V0 2 NAU7802 breakout board measures 74 × 105 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the V0 2 NAU7802 breakout board?
20 components, from 11 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the V0 2 NAU7802 breakout board design files?
From the MacNite/HiveHub repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the V0 2 NAU7802 breakout board design in my own project?
Yes, under the terms of its MIT license, which MacNite chose for the repository.
Can I test firmware for the V0 2 NAU7802 breakout board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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