OK got it sorted. (I don't like reading post that have no solution.) I had the output from the two pots totally separate with two wires each, and measured the resistance of each separate pair, and was getting the false readings without touching either the +5v or ground wires or any metal part of the...

No it dosen't need the USB lead. Cut one for nothing. I get the same results with the 5v power supplied to the +5v and Gnd pins on the ESP32. Didn't notice that before. So now back to why dose me touching the metalwork make it work correctly. Strange.

I found this Exiting Idle State The host includes 15 kΩ pull-down resistors on each data line. When no device is connected, this pulls both data lines low into the so-called "single-ended zero" state (SE0 in the USB documentation), and indicates a reset or disconnected connection. A USB device pulls...

Ah, progress....I sacrificed a USB lead cutting the type A plug off and powering the ESP board via the red / black outer wires. Same problem existed, but when I touched the casing of the ESP32 chip shield or the mini usb socket shield, I got the correct readings from the digital pots. The same corre...

I know I said in my previous post that it works fine. WELL, I'm now at the dreaded problem where the circuit works as expected while connected to the laptop via USB, but wont work 'properly' when on external 5v PSU. I'm saying 'properly' because the code still runs ok but the resistance values from ...

Yip Had a quick look at that. I'll give it a go. I like the fact it can be used on an iphone, unlike MIT app maker which is just for android. Thanks again Becorey. Cheers

Yip got it working. Thank you for your advice. I fed the pot from the 3.3v output on the ESP and used pins 4,16 &17 and now I can change the value of setting the pot in the code and reading the pots output on a multimeter. All good. Are you familiar with the MIT app designer tool ? My next area is t...

Hi Becory, I really appreciate you giving me your time. Can I paste a picture (.PNG) from my desktop in these replies? I've tried to copy & paste. Don't know how to use the insert image button. A problem I have is what pins on the ESP do I use, and how do I refer to them in code? I picked GIO pins 2...

Hello all. I have a circuit which uses a 1k digital pot connected to an Arduino Uno board. I can set this pot to any value I desire locally, but I would like to be able to set its value remotely with my android phone, building the app using the MIT App Inventor program. So I now have a ESP WROOM - 3...