IoT pH-meter of aquariums, hydroponics, bevarage, skin, urine, etc. Software for ESP8266, Raspberry Pi and Arduino. ATC. MQTT support.Designed by HomeLab.link in Bulgaria
The HomeLab-pH is a circuit board intended for pH measurements. The board may be used at home or professionally for a wide range of applications as monitoring of aquarium water quality, fermentation …Read More…
The HomeLab-pH is a circuit board intended for pH measurements. The board may be used at home or professionally for a wide range of applications as monitoring of aquarium water quality, fermentation progress of beverage and wine, routine skin pH or urine pH checks. Will be useful as well at school in chemistry classes. The measured values are corrected for temperature changes by means of an included waterproof thermometer. The HomeLab-pH board is just a measuring block. It has to be assisted by an external CPU-board and corresponding software to perform the calculations. Software packages for Raspberry Pi computer, Arduino controller or ESP8266 module are freely available to download from the HomeLab-pH companion site at http://homelab.link. They give the user interface to log and visualize the measured values, as well as to calibrate the board.
When connected to Arduino the module can be controlled by the user visually at the console. Alternatively it can act as a data server for HomeLab-pH accessed by a remote machine through a special communication protocol. The user may program additional functionality using the available HomeLab_pH library for Arduino IDE.
When connected to Raspberry Pi or ESP8266 viewing the readings or calibrating is as simple as pointing a smart-phone browser to the Pi's / ESP8266's LAN address. The module can also be accessed through requests over http.
**The inaccuracy of the measurement depends on the precision of the performed calibration. The specified value is valid for 2-point calibration where the buffers' inaccuracy is not greater than 0.02 pH units and their temperature difference with the sample is less than 5°C. If calibration buffers of ± 0.01 pH are used, the inaccuracy of the measured pH value may be even lower.
Immersed electrical appliances (e.g. aquarium pumps) may influence the measured pH value due to the high impedance of the pH-probe. The HomeLab-Isol module effectively protects the pH-module's digital and power lines from the interfering direct currents.
Find more information at http://homelab.link/ph/meter/isolated/.
(shown at one of the pictures above)
Additionally when the optional isolator module is also purchased:
Attention: a combination pH-probe is not included.
A tracking number is provided.
More add-on options are described below.
The HomeLab Shielded Display is a small OLED display with transparent acrylic shield in front to protect from dust or spills. It comes also with a short connection cable and with some screws to fix it to a front panel of a box. HomeLab software support for this display is currently available only for ESP8266 modules.
More info here.
A special stand is available if Raspberry Pi Zero is to be used as a computing unit. The stand is used to conveniently harbour in one place all the circuit boards involved. May be placed horizontally on a surface or hanged vertically.
The plates are made of plexiglass while the pillars are of polyamide. There is also a set of a small connector board and a short ribbon cable to link the Pi to the module/s. All elements come in a separate box. See what is inside.
More pictures here.
A rainbow cable set to connect the modules to male pin headers of controllers like Arduino Nano or Raspberry Pi is provided. The cable wires are colour coded to facilitate the connection work. The cable is 18 cm (7 in) long.
More info here.
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Dries | March 2, 2021
Arjun | Jan. 10, 2019
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