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V0 3-Scale Module

MacNite·HiveHub·pcb-design/scale module/esp32 (30 pin)/_V0_3-Scale_Module.kicad_pcb

V0 3-Scale Module layout, top view — open source ESP32 board by MacNite

About the V0 3-Scale Module

V0 3-Scale Module is an open source ESP32 PCB design by MacNite, published on GitHub under the MIT license. It is a 2-layer board measuring 80 × 100 mm, with 25 components from 23 distinct parts.

Its main chip is the 113991254, from the ESP32 family. By type, the board carries 20 connectors, 1 IC and 1 switch.

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…

Main components on the V0 3-Scale Module

113991254

V0 3-Scale Module bill of materials (BOM)

25 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
113991254
U1
1
ESP32-left-RXTX
J1
1
ESP32-right-powerin
J2
1
Scale2_to_ESP32
J3
1
Scale1_to_ESP32
J4
1
RTC
J5
1
Sound Module INMP441 - Hive1
J6
1
Scale1_to_Terminal
J7
1
Scale2_to_Terminal
J8
1
SD-Module
J9
1
PowerIn
J10
1
Loadcell1-Input
J11
1
Loadcell2-Input
J12
1
DS18B20-1
J13
1
SHT40 Ambient
J15
1
Sound Module INMP441 - Hive2
J16
1
I2C
J17
1
Expansion
J18
1
PowerModuleHeader
J19
1
BeeCounter
J20
Show 3 more
QtyPartRefs
1
NAU7802
J21
3
4.7k
1W-4.7k1, SCL-4.7k1, SDA-4.7k1
1
SW_Push
SW1

V0 3-Scale Module 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 3-Scale Module: common questions

What microcontroller does the V0 3-Scale Module use?

The V0 3-Scale Module is built around the 113991254, from the ESP32 family.

How big is the V0 3-Scale Module?

The V0 3-Scale Module measures 80 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the V0 3-Scale Module?

25 components, from 23 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 3-Scale Module 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 3-Scale Module 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 3-Scale Module 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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