I already bought some PH sensor module and ph probe for my project to read ph for some liquid

PH sensor Module and PH probe

I read some article on internet, but nothing of the article says any clue about this module. I'm really newbie in this of sensor. Did anyone know how to make this PH sensor module work with Raspberry? Here is description for this product http://www.aliexpress.com/item/PH-sensor-Module-1pc-PH-Sensor-Module-V1-1-1pc-PH-Probe-for-AVR-51-PH/32628438991.html?spm=2114.40010308.4.21.kIhHVz

  • It's not really a starter project given that there are no Pi instructions. I'd try to search for the sensor and Arduino and see if you can adapt any instructions you find.
    – joan
    Aug 12, 2016 at 8:11
  • But I never use Arduino....is that Arduino the same as Raspberry?
    – Thebrizkys
    Aug 12, 2016 at 8:20
  • You need to do some research.
    – joan
    Aug 12, 2016 at 8:25
  • There is a note on the product page "If you need the Test Code or Manual, please leave us a message, we will send it to you by Email." I suggest you do so. Although there is a 3.3V controller on the board, the sensor seems to require 5V power, and the actual logic level of the device is not easily discernible for me (but the manual will be explicit); if that also requires 5V you will need a level shifter in order to connect it to the Pi, which can provide 5V power but uses 3.3V logic.
    – goldilocks
    Aug 12, 2016 at 11:52
  • 1
    In the future, I suggest you research something before you buy it, since this is likely to end up as something you can just leave in a drawer until you have more experience at solving such problems.
    – goldilocks
    Aug 12, 2016 at 12:54

1 Answer 1


I have entered webpage mentioned on your PCB. Pinout is in Chinese: enter image description here This sensor seems to be analogue. V+ denotes power supply. https://world.taobao.com/item/24530844085.htm?fromSite=main&spm=a312a.7700824.w4002-2043800792.14.6f1cbbceJnVwc5 it states

that it can easily operate at 5V, however I guess it may operate at 3V3 as well. G denotes GND, T denotes temperature, probably D and P are also analogue outputs, that need to be measured using ADC.

You can read your signals using ADC connected to your RPi. Such device can easily communicate with RPi using one of two interfaces SPI, I2C.

More info: https://learn.adafruit.com/raspberry-pi-analog-to-digital-converters?view=all

Anyway it is important to request datasheet from the distributor, so you will no how to adjust potentiometers. You may also try to hack it :D

Analogue outputs should not exceed the power supply you may try to connect them to the ADC input, but remember to connect GND on your board to GND of your ADC.

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