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PGR

Projeto-Guarda-Rios·PCB·PGR - PCB/PGR - PCB/PGR.kicad_pcb

PGR PCB layout, top view — open source ESP32 board by Projeto-Guarda-Rios

About the PGR PCB

PGR is an open source ESP32 PCB design by Projeto-Guarda-Rios, published on GitHub under the MIT license. It is a 4-layer board measuring 67.5 × 44.4 mm, with 75 components from 44 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the AP2114H-3.3TRG1, BQ24074RGT, TPS61200DRC, CP2102N-Axx-xQFN28 and DW01A. By type, the board carries 26 resistors, 16 capacitors, 10 diodes, 7 ICs, 6 connectors and 3 transistors.

It belongs with the power & battery, iot & wireless and sensors designs in this gallery.

From the project

O repositório para a PCB do Projeto Guarda Rios! Inclui todos os ficheiros relacionados com a PCB!

This repository contains all PCB design files for the Guarda-Rios Project — an open-source, low-cost, low-power water quality monitoring system. Multiple stations are deployed along a river so that parameter spikes between adjacent stations reveal precisely where pollution enters the waterway.

The AquaNode is the submerged node of each station. It is built around an STM32L053R8 microcontroller (ultra-low-power) and integrates a DS18B20 water temperature sensor (1-Wire) and a DFRobot SEN0554 turbidity sensor. Readings are encoded into the custom Guarda-Rios protocol and transmitted to the…

Main components on the PGR

AP2114H-3.3TRG1BQ24074RGTTPS61200DRCCP2102N-Axx-xQFN28ESP32-WROOM-32EDW01AMAX3485

PGR bill of materials (BOM)

75 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AP2114H-3.3TRG1
IC1
1
BQ24074RGT
U1
1
TPS61200DRC
U3
1
CP2102N-Axx-xQFN28
U4
1
ESP32-WROOM-32E
U5
1
DW01A
U6
1
MAX3485
U8
2
SS8050-G
Q1, Q2
1
FS8205A
Q3
1
Conn_01x16
J1
1
Conn_01x03
J7
2
Conn_01x04
J8, J11
1
USB_C_Receptacle
J9
1
Conn_01x02
J10
1
Battery
BT1
1
Buzzer
BZ1
1
BOOT
SW1
1
RESET
SW2
1
SW_SPDT
SW4
1
Thermistor_NTC 10 kΩ 25 °C
TH1
Show 24 more
QtyPartRefs
2
SS14
D1, D2
3
LESD5D5.0CT1G
D3, D4, D5
1
SM712_SOT23
D6
3
BLUE
D7, D9, D10
1
RED
D8
1
L
L1
7
0.1uF
C1, C2, C3, C7, C10, C12, C15
5
10uF
C4, C5, C6, C13, C14
2
22uF
C8, C9
1
4.7uF
C11
1
100nF
C17
1
1.5K
R1
3
2K
R2, R8, R17
1
120R
R3
2
5.1K
R4, R5
1
22.1K
R6
1
47.5K
R7
9
10K
R9, R10, R15, R16, R18, R19, R20, R28 +1
1
100R
R11
1
22R
R12
3
33R
R13, R21, R24
1
150R
R14
1
900K
R22
1
100K
R23

PGR design files

The KiCad project lives in the Projeto-Guarda-Rios/PCB repository on GitHub; these links point at the commit this page was built from.

PGR: common questions

What microcontroller does the PGR use?

The PGR is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the PGR PCB?

The PGR measures 67.5 × 44.4 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the PGR?

75 components, from 44 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 PGR design files?

From the Projeto-Guarda-Rios/PCB 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 PGR design in my own project?

Yes, under the terms of its MIT license, which Projeto-Guarda-Rios chose for the repository.

Can I test firmware for the PGR 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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