Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
R
@ajb2k3 seller's page on GitHub says ESP32 series works wrong. https://github.com/DFRobot/DFRobot_PH I can confirm it because analogRead() returns some unreal value of voltage: 8461.9