HardLabs

MASTER

zen451019·MONITOR_HARDWARE·src/30-01-25/REV3/MASTER/MASTER.kicad_pcb

MASTER PCB layout, top view — open source ESP32 board by zen451019

About the MASTER PCB

MASTER is an open source ESP32 PCB design by zen451019, published on GitHub. It is a 2-layer board measuring 90 × 85 mm, with 44 components from 18 distinct parts.

Its main chip is the ESP32, from the ESP32 family. Other key parts include the MCP23017_SP, RS485_TRANSCEIVER and PC817. By type, the board carries 15 resistors, 9 diodes, 6 ICs, 6 switches and 4 capacitors.

It belongs with the iot & wireless designs in this gallery.

From the project

This repository contains the complete source code for the firmware for NEMO (Node for Electromechanical Monitoring & Operation), a high-performance IoT node designed for real-time monitoring of analog signals.

This repository contains the complete source code for the firmware for NEMO (Node for Electromechanical Monitoring & Operation), a high-performance IoT node designed for real-time monitoring of analog signals.

The system is optimized to capture, process, and transmit voltage and current data from sensors, making it an ideal solution for predictive maintenance, energy consumption monitoring, and industrial machinery diagnostics applications.

Main components on the MASTER

MCP23017_SPRS485_TRANSCEIVERPC817

MASTER bill of materials (BOM)

44 components, 18 distinct parts.

QtyPartRefs
1
MCP23017_SP
U1
1
RS485_TRANSCEIVER
U2
4
PC817
U4, U5, U6, U7
2
SCREW_TERMINAL_5
DIGITAL_INPUTS1, MODBUS_OUT1
1
ESP32
ESP32
1
SCREW_TERMINAL_2
PWR_IN1
1
MINI-SPDT-SW
S1
5
SW_Push
SW1, SW2, SW3, SW4, SW5
2
LED
D1, D2
6
1N5711
D3, D4, D6, D7, D8, D9
1
SMAJ24CA
D5
2
100nF
C1, C5
1
100 uF
C3
1
10uF
C4
9
10k
R0, R1, R2, R3, R5, R8, R10, R12 +1
1
100k
R4
1
1k
R6
4
4.7k
R7, R9, R11, R13

MASTER design files

The KiCad project lives in the zen451019/MONITOR_HARDWARE repository on GitHub; these links point at the commit this page was built from.

MASTER: common questions

What microcontroller does the MASTER use?

The MASTER is built around the ESP32, from the ESP32 family.

How big is the MASTER PCB?

The MASTER measures 90 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MASTER?

44 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the MASTER design files?

From the zen451019/MONITOR_HARDWARE repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the MASTER design in my own project?

The repository has no license, so all rights stay with zen451019. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the MASTER 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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