Ph probe and Temp link to Easy IOT Cloud

[wacky123]

Ph Temp Probe is used to detect PH and Temperature in a aquarium / fish tank, the code will also create a EasyIoT entry on the cloud.

3D plastic cover decrease the flow of water for more accurate reading.

3D DIY print cover:
https://www.thingiverse.com/thing:4825350
code:
https://github.com/frossty/Ph_Temp_Prob
Tools:
PH probe with BNC converter:
https://www.aliexpress.com/item/32957428276.html?spm=a2g0s.9042311.0.0.142a4c4dEZFU4D
ESP8266:
https://www.aliexpress.com/item/400...earchweb0_0,searchweb201602_,searchweb201603_
Easy IoT could account :
https://iot-playground.com

 

[SPR1968]

Bump

 

[Elson26]

Nice DIY!

 

[wacky123]

Schema diagram of the prob on a ESP8266
Note: i used a reverse LED which provided 1.4M Ohms

 

[wacky123]

Few more pictures of the connecting wires

 

[Asmolupers]

Few more pictures of the connecting wires

How did you get around the electrical noise problem? I tried this exact ph probe setup and it was incredibly unstable. I ended up switching to atlas scientific and it works flawlessly.

 

[wacky123]

How did you get around the electrical noise problem? I tried this exact ph probe setup and it was incredibly unstable. I ended up switching to atlas scientific and it works flawlessly.

I didn't notice any problem with electrical noise, just had to use a very large resistor on ESP8266 to get the voltage down to 2.5V on A0 (analog), i my case reverse LED worked.
I did had a problem with the Probe sensor it was too sensitive and even slightest movement of water gave inconstant readings, the 3D printed cover stabilized the flow around the probe sensor and code takes a sample of 10 readings, sorts and takes the middle readings.

so far the results has been consistent and stable .... im not sure about the accuracy but it gives a good idea about the swings and flows of the tank.