Read Ranjib post but to me is not reading -8K to me reading 8.72 ph
Next, create a pH monitor (if you dont see ph tab, then probably its not enabled, enable this module under Configuration -> Settings, and reload reef-pi). Associate the ph monitor with the newly created analog input. And thats it, you should see your ph sensors reading. Note, without calibration it will emit sensor values in raw milivolts, which for me is around -8K.
Next, create a pH monitor (if you dont see ph tab, then probably its not enabled, enable this module under Configuration -> Settings, and reload reef-pi). Associate the ph monitor with the newly created analog input. And thats it, you should see your ph sensors reading. Note, without calibration it will emit sensor values in raw milivolts, which for me is around -8K.