I'm an eejit. It WAS the redundant pinMode instructions - I had simply messed up the compilation (edited one file, compiled a different one!).

This bug report related to the same issue, and explained the fix.
https://github.com/espressif/arduino-esp32/issues/7673

I can now run my code successfully ...

My apologies - I've just realised that although that was my fourth post, my third one was still awaiting approval when I posted my fourth one. Case closed!

It seems I was on the right lines with this approach:

platform = https://github.com/platformio/platform-espressif32.git
platform_packages = framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#3.5.0

but I was looking at version numbers for the wrong repository. :(

https ...

Ok, moot point - my posts now appear immediately

Thanks ESP_Sprite

That was actually my fourth post, but it still went for approval. Does the requirement get lifted automatically by the board software, or does it require a manual switch by an admin?

(I'm posting this mostly to see if I can now post immediately, but if it goes off for approval ...

1) Why do my posts have to be approved?
I'm a new user, so I assumed I have to have a certain number of posts before this requirement is lifted, but there is no mention of that in the FAQ. I did see this however:
The board administrator may have decided that posts in the forum you are posting to ...

I have made a PCB with a WROOM-32E module. The PCB includes a 16x2 LCD display, using a 16-pin parallel connection. I am controlling the display's contrast and brightness by using PWM control of a couple of GPIO pins (GPIO13 for brightness, via transistor to supply a controlled amount of my 5V ...

I built a MIDI circuit for an ESP32 based on the information in the very useful video here: https://www.notesandvolts.com/2014/11/midi-and-arduino-circuit-analysis.html (the circuit diagram used in that video is here: https://2.bp.blogspot.com/-sQ8Uw7x-Vs0/VOatHJCRTGI/AAAAAAAAA9E/yD_TdRw_QKo/s1600 ...

Hi - I'm developing a PCB that uses nearly all of the available GPIO pins on a WROOM32 module (9 push buttons, a 16x2 LCD display without I2C with PWM pins for brightness and contrast (8 pins in total), an IR receiver, a Tx/Rx serial port - 20 pins in total), so I'm investigating whether I can use ...