Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

RE: Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

Torkialareed — Thu, 20 Jan 2022 13:23:42 GMT

I'm a user and trying to find someone to put the system together. However, I'm starting with 40-20mA analog sensor to avoid noise. Interfaced with a current-to-voltage converter, then output is the input to 1024 positions digipot, included for calibration, then to 16 bit ADC and to esp32.

With the code above, will we not need the digipot?

RE: Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

bmyrand — Mon, 08 Oct 2018 06:15:32 GMT

is this project still active ?

wish i could download that .zip file somewhere for the libraries.

i would like to add 2 dozing pumps to that to add ph up or ph down as required.

RE: Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

robned — Fri, 03 Mar 2017 08:32:36 GMT

Hello Michael,

Thanks for this very good project. (

I have got it partially working but the temperature read out stays 0 degrees

TEmp Sensor is ok (tested in other project)

I am just starting with Arduino so forgive me if I ask a very stupid question:

The sensor connections are : 22,24 and 26. However in the program lines you mention as comment : Arduino 9,8 and 10

Do I have to connect the DS18B20 wires to 22,24 and 26? If yes, do you have any tip for me to get the temp sensor working?

Best Regards,

Rob

By the way , to get my LCD keypad switches working I had to modify the program lines:

else if (adc_key_in < 50) button =1; // was 50

else if (adc_key_in < 150) button =2; //was 250

else if (adc_key_in < 350) button =3; //was 450

else if (adc_key_in < 550) button =4; // was 650

else if (adc_key_in < 750) button =5; //was 850

RE: Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

Former Member — Fri, 01 Apr 2016 23:48:16 GMT

hello,

i love this site. thank you!

i am unable to get the code to work. mega and uno using sainsmart and rfrobot lcd's.

the buttons will not work and the code seems to hang just reading the ph. new to coding but racking my brain just the same

thanks!

RE: Automated Green House Blog:13.4 - PH Control: PH Probe LCD Readout + Gui + Probe Health Readout

DAB — Fri, 08 Jan 2016 19:35:13 GMT

Great update.

Are you keeping a log of the PH levels of the fluid.

I am curious how much do they change over time?

Or is one batch stable enough to use for a while?

DAB