For this project , that is build up a Arduino base PH meter for monitor PH , Water Temperature and Room Temperature. Hardware that you should need is :

• Arduino UNO R3
• LCD Keypad Shield
• PH Meter Board
• 3D Printed Case

Feature :

• Show real time PH reading , Room and Water Temperature
• Use keypad for enter "Calibration Mode" for read the PH reading for PH calibration
• Serial Port communication via Arduino UNO USB port , send command to UNO for get back the PH and Temperature readings.
• use eeprom to store data of calibration

first version : https://github.com/kevinlohk/ArduinoPhMeter