Solved! The ESP WiFi uses one of the two ADC 'peripherals' to function. Relocating to the other side of the ESP and using
different pins eliminated the issue.

Arduino IDE 2.3.2 When running the Emon Energy Monitor program available at GitHub on an ESP32-S microcontroller the voltage and current data is displayed on the Serial Monitor output. When I attempted to add the host/client code (WiFi.h) to allow me to access the data remotely through a browser req...

You should use ESP32 dev module. WROVER is a different module which includes psram. Install the WiFI scan example, set your logging level to verbose. If the rssi levels seem very different from what you get on the other modules, that would indicate some manufacturing defect. Your response was very ...

Hello, I was wondering what available troubleshooting is available to determine why an ESP processor is not connecting to a local area network. I have used ESP WROOM-32s for a couple years and they normally work without any issues. But I just received 3 new ones that look identical to my existing un...

So I ordered one 8266 off the web at ebay and had no issues interfacing to it. I ordered another from a different vendor and the one that arrived looks identical except for the Micro USB C interface port. It is larger. Does anyone know the spec difference on these USB C micro/mini ports? I am going ...

Solution:

Using a Raspberry Pi platform I am getting a "no module named serial" error on compile of ESP32 sketch under 1.8.19 Arduino IDE. The Espressif library is installed. Does anyone know what causes this error generation or how to correct it? I have installed python3. Traceback (most recent call last): F...

lbernstone wrote: ↑

Thu Feb 17, 2022 6:55 pm

I'm actually surprised you aren't getting division by zero errors.
You need to set the pinMode in your setup (or at the top of your loop).

Code: Select all

pinMode(39, INPUT);

Ibernstone,

I inadvertently failed to copy the void setup() into the original post. The pinMode is defined there.

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Evidently the ADC module w/ the ESP32 does not properly extrapolate the conversion algorithm offered by Seeed. The analog value displayed is always: -273.15; the last parameter used in the 1st line of the algorithm. Is there a workaround for this issue? #include <math.h> #define ONBOARD_LED 2 const...