PH metre¶

PH-4502C¶

Po Ph analog
To Temp analog
Do Trig digital

ADS1115¶

gain x1 (4.096V)

ph=-5.7*(%value%/2^15*4.096)+21.34

https://www.e-tinkers.com/2019/11/measure-ph-with-a-low-cost-arduino-ph-sensor-board/

http://agregationchimie.free.fr/phmetre_arduino.php

DS18B20 Température¶

correction en température du Ph

TDS Total Dissolved Solids¶

le TDS mesure en ppm les solides dissous dans l’eau.

compensationVolatge=Voltage/1.0+0.02*(temperature-25.0); //temperature compensation
tdsValue=(133.42*compensationVolatge^3 - 255.86*compensationVolatge^2 + 857.39*compensationVolatge)*0.5

https://wiki.keyestudio.com/KS0429_keyestudio_TDS_Meter_V1.0