HardLabs

Auto pool

rletendu·auto_pool·hardware/autopool.kicad_pcb

Auto pool PCB layout, top view — open source ESP32 board by rletendu
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About the Auto pool PCB

Auto pool is an open source ESP32 PCB design by rletendu, published on GitHub. It is a 2-layer board measuring 110.5 × 96.5 mm, with 60 components from 40 distinct parts.

Its main chip is the ESPMINI32, from the ESP32 family. Other key parts include the ADS1115_module, DHT11, RTC_DS3231_MODULE and AMS1117-3.3. By type, the board carries 18 connectors, 17 capacitors, 12 resistors, 5 ICs, 4 diodes and 2 jumpers.

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

From the project

ESP32 swimming-pool controller with pH / ORP / filter automation, Nextion touch UI, web dashboard, MQTT, and native Home Assistant autodiscovery.

ESP32 swimming-pool controller with pH / ORP / filter automation, Nextion touch UI, web dashboard, MQTT, and native Home Assistant autodiscovery.

AutoPool runs unattended on the side of the pool: it schedules the filter pump, doses chlorine on ORP, holds pH inside a target band by injecting acid (and optionally base) through peristaltic pumps, watches tank levels, and exposes everything over a 5″ touch panel, a web UI, and MQTT.

Auto pool, from the project README
From the project README

Main components on the Auto pool

ADS1115_moduleDHT11ESPMINI32RTC_DS3231_MODULEAMS1117-3.3

Auto pool bill of materials (BOM)

60 components, 40 distinct parts.

QtyPartRefs
1
ADS1115_module
U1
1
DHT11
U2
1
ESPMINI32
U3
1
RTC_DS3231_MODULE
U4
1
AMS1117-3.3
U5
1
pH Sense
J1
1
Cl Sense
J2
1
Pressure. Sense
J3
1
Extra Sense
J4
1
Cl LevelMin
J5
1
pH+ LevelMin
J6
1
pH- LevelMin
J7
1
Water_level
J8
1
Presence
J9
1
Water_temp
J10
1
VCC_5V
J11
1
Ext1
J12
1
Ext2
J13
1
Flow
J14
1
Display
J15
Show 20 more
QtyPartRefs
1
Relays
J16
1
VCC_3.3V
J17
1
I2C_est1
J18
1
Buzzer
BZ1
1
vccESP
JP7
1
VCC_33
JP8
1
Reset
SW1
1
5.5V
D1
1
3.3V
D2
1
Notif1
D3
1
Notif0
D4
8
100p
C1, C2, C3, C4, C5, C6, C7, C8
5
100n
C9, C10, C12, C13, C15
2
47u
C11, C14
1
1u
C16
1
10u
C17
6
10k
R1, R2, R3, R4, R5, R6
1
470
R7
2
2.2k
R8, R9
3
330
R10, R11, R12

Auto pool design files

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

Auto pool: common questions

What microcontroller does the Auto pool use?

The Auto pool is built around the ESPMINI32, from the ESP32 family.

How big is the Auto pool PCB?

The Auto pool measures 110.5 × 96.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Auto pool?

60 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the Auto pool design files?

From the rletendu/auto_pool repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Auto pool design in my own project?

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

Can I test firmware for the Auto pool 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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