2 layers91.5 × 57.5 mm ZPool v2.0, the printed circuit board in 3D

ZPool v2.0

Capteurs Zigbee pour gestion de piscine

Size: 91.5 × 57.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 61
Nets: 47
Pads: 214
Tracks, vias: 583, 70
Pours: 4
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 30 Jan 2026
Updated: 11 Jul 2026

Overview

ZPool v2.0 is an open-source printed circuit board by a-bulcke, from the a-bulcke/zpool repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 91.5 × 57.5 mm with 61 parts on 47 nets, routed with 583 tracks and 70 vias.

It is built around the ADS1115IDGS, PCA9306D and SMAJ5.0A. Its parts include 24 resistors, 19 capacitors, 8 ICs, 5 connectors and 1 diode. It belongs with the ESP32 and RISC-V boards of this library.

Main components

README

README.md

zpool V2

Carte Zigbbe de gestion de piscine avec mesure pH, Orp, température et pression

ATTENTION ERREUR R26=0 ohm

Les nouveautés :

text

Filtre sur l'alimentation USB du Xiao

Régulation LDO coté capteurs pour enlever les bruits provenant du Xiao et de l'ADM3260.

Alimentation AOP et ADS1115 en 4.7V

Utilisation d'une référence de tension 2.35V (4.7/2) au lieu des ponts diviseurs non bufferisés

Gain Orp passe de 2.32 à 2

Guard ring pour éviter les courants de fuite au niveau des sondes (dont l'impédance est très élevé ce qui peut expliquer l'éventuelle dérive sur la v1.0)

Connecteur I2C en 3.3V pour écran Oled ou autre

Sources :

https://github.com/Loic74650/pH_Orp_Board

https://www.360customs.de/fr/2019/12/orp-redox-ph-elektrometer-shield-fuer-wemos-d1-mini-mit-lmp7721-ads1115-adm3260/

https://www.ti.com/lit/ds/symlink/lmp7721.pdf?ts=1769807145680&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMP7721

Xiao ESP32C6

Utilisation d'un ESP32C6 pour en faire un routeur Zigbee.

Fonctionne avec Zigbee2Mqtt sous Home Assistant.

La carte mesure le pH, l’ Orp, la température et la pression.

La gestion des pompes est assurée par des prises Zigbee c’est plus simple que d’ajouter des relais à la carte.

alt text

Capteur de température DS18B20

Capteur de pression 30 Psi

Branchements

température et pression

alt text

pH et Orp

alt text

Zigbee2Mqtt

Dans Zigbee2mqtt sous Home Assistant, laller dans le menu Paramètres puis console de developpement - convertisseurs externes :

Créer un nouveau convertisseur (de nom ZPool.js) et coller le contenu de ZPool.js

alt text

Redémarrer Zigbee2mqtt puis autoriser l'association.

Mise à jour

Programmation - Mise à jour

Dans Arduino IDE

Dans File - Preferences... ajouter :

https://espressif.github.io/arduino-esp32/package_esp32_index.json

Choisir une carte XIAO_ESP32C6 :

Dans Tools choisir Partition scheme: "Zigbee ZCZR 4MB with spiffs" et Zigbee Mode: "ZCZR (coordinator/router)"

Et copier coller le code dans Arduino IDE :

Mettre Erase All Flash before sketch Upload : Disabled pour conserver l'appairage zigbee

Installer les bibliothèques : Chercher et installer :

text

#include "OneWireESP32.h" //esp32-ds18b20 par junkfix
#include <ADS1X15.h> //ADS1X15 par Rob Tillaart
#include "RunningAverage.h" // RunningAverage par Rob Tillaart

Puis Upload :

Category and platform

ESP32 RISC-V

Project files

Show this board on your page

https://pcbkit.io/boards/a-bulcke/zpool

The board's own page, for a message or a post.

Source

Repository: a-bulcke/zpool
Board file: Kicad/ZPool_v2.0/ZPool_v2.0.kicad_pcb
Commit: 9f6ee47
Licence: Apache-2.0

Parts

Qty	Value	Footprint	References
7	100nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1, C2, C3, C4, C9, C10, C12
7	4K7	Resistor_SMD:R_0805_2012Metric	R19, R20, R25, R27, R28, R29, R31
4	0	Resistor_SMD:R_0805_2012Metric	R15, R16, R17, R18
4	10K	Resistor_SMD:R_0805_2012Metric	R11, R12, R13, R14
4	1uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C5, C6, C7, C8
3	MountingHole	MountingHole:MountingHole_2.1mm	H1, H2, H3
2	10uF	Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder	C11, C13
2	150K	Resistor_SMD:R_0805_2012Metric	R1, R5
2	4.7uF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C17, C18
2	Conn_Coaxial	Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal	J1, J2
2	LMP7721MA/NOPB	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U1, U2
1	100K	Resistor_SMD:R_0805_2012Metric	R2
1	100n	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C14
1	10nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C16
1	1M	Resistor_SMD:R_0805_2012Metric	R6
1	1nF	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C19
1	200K	Resistor_SMD:R_0805_2012Metric	R26
1	470u	Capacitor_SMD:CP_Elec_6.3x5.7	C15
1	47K	Resistor_SMD:R_0805_2012Metric	R30
1	51K	Resistor_SMD:R_0805_2012Metric	R4
1	ADM3260	Package_SO:SSOP-20_5.3x7.2mm_P0.65mm	U4
1	ADS1115IDGS	Package_SO:VSSOP-10_3x3mm_P0.5mm	U3
1	Conn_01x04_Male	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	J3
1	Conn_DS18B20	TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-3-2.54_1x03_P2.54mm_Horizontal	J5
1	Conn_Pression	TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-3-2.54_1x03_P2.54mm_Horizontal	J4
1	FerriteBead	Inductor_SMD:L_0603_1608Metric	FB1
1	LT3042xMSE	Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm	U6
1	PCA9306	Package_SO:VSSOP-8_2.3x2mm_P0.5mm	U8
1	R10K	Resistor_SMD:R_0805_2012Metric	R22
1	R30.9K	Resistor_SMD:R_0805_2012Metric	R21
1	SMAJ5.0A	Diode_SMD:D_SMA	D1
1	TLE2426xD	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U7
1	XIAO ESP32-C6	footprints:Seeeduino XIAO-MOUDLE14P-2.54-21X17.8MM	U5

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Questions

How big is the ZPool v2.0 PCB?

It measures 91.5 × 57.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the ZPool v2.0 use?

61 parts, built around the ADS1115IDGS, PCA9306D and SMAJ5.0A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the ZPool v2.0 KiCad files?

From the a-bulcke/zpool repository on GitHub, at the commit this page was made from: the board is Kicad/ZPool_v2.0/ZPool_v2.0.kicad_pcb and its schematic Kicad/ZPool_v2.0/ZPool_v2.0.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the ZPool v2.0 design in my own project?

Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).