https://github.com/mcorts/m5stickc_ph_sensor
pH (Power of Hydrogen) sensor for water based solution with ph-4502c and ESP32 microprocessor
https://github.com/mcorts/m5stickc_ph_sensor
arduino esp32-arduino iot m5stickc
Last synced: 2 months ago
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pH (Power of Hydrogen) sensor for water based solution with ph-4502c and ESP32 microprocessor
- Host: GitHub
- URL: https://github.com/mcorts/m5stickc_ph_sensor
- Owner: McOrts
- License: mit
- Created: 2020-06-23T13:00:02.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2020-06-25T11:14:07.000Z (almost 5 years ago)
- Last Synced: 2025-03-26T16:01:40.317Z (3 months ago)
- Topics: arduino, esp32-arduino, iot, m5stickc
- Language: C++
- Homepage:
- Size: 4.16 MB
- Stars: 14
- Watchers: 1
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# pH sensor for water based solution with ph-4502c and ESP32 microprocessor
## The problem
My aquarium always has water turbidity problems.
## Deployed idea
The approach is easy. We have a sensor that send an analogical signal that we have to read. Most of the microcontrollers that exist have at least, one analogical digital conversion input AD. I have chosen the compact M5StickC model based on ESP32 that incorporates a perfect LCD screen for this use case.
## Things used in this project
**Hardware components**
- [M5StickC ESP32 PICO Mini IoT Development Board Finger Computer with Color LCD Built in Battery MPU...](https://www.aliexpress.com/item/32985247364.html) × 1
- [PH-4502C Liquid PH Value Detection detect Sensor Module Monitoring Control Board For Arduino BNC Electrode Probe](https://www.aliexpress.com/item/32957428276.html) × 1
- Jumper Wires / DuPont Wires
- Voltage Tester
**Software apps and online services**
- [Arduino IDE](https://www.hackster.io/arduino/products/arduino-ide?ref=project-8e87cc)
- [Eclipse Mosquitto open source MQTT broker](https://mosquitto.org/)
- [Node-RED](https://nodered.org/)
## How does it Work?
The device is intended to be used as a portable tool. When the M5StickC is turned on, its display shows a continuous reading. If we press the M5 button, the last measurement will be sent in an MQTT package to the server that we have configured in the config.h file.
A Node-red application collects the package and displays the graph in an component of the dashboard that I have developed for the control of the smart aquarium filter.
## Development
I have used prototyping material. What is working is proof of concept for the use case of the system control of my aquarium of turtles.
**Schematics**
## References
* Based on [Wiring The pH (Power of Hydrogen) Ion Concentration Sensor with BNC Electrode Probe](https://www.14core.com/wiring-the-ph-power-hydrogen-sensor-bnc-electrode-probe-with-microcontroller/)
* [ph-4502c ph meter calibration notes](https://tlfong01.blog/2019/04/26/ph-4502c-ph-meter-calibration-notes/)