I found the perfect answer:

ESP32 MPY Jama. Get it at https://github.com/jczic/ESP32-MPY-Jama and be happy with effortless MicroPython work.

Hi all, I'm using an ESP32 to pull in XML flight data for Finnish airports from the Finnish Aviation Authority's API. I have managed to do it with both MicroPython and Arduino's IDE, but the data is clean only with MicroPython. The data mass is 900,000 characters on the average, so it cannot be read...

Probably 50.

Sorry no, I had to direct my efforts to other projects. I should try this now.

That's what I was afraid of. Oh well, they served well, but my students probably fiddled with the wirings while it was connected.

Or maybe I did.

Thank you for confirming that they cannot be resurrected.

Yes, they are all DevKitC chips, but they have functioned perfectly well in both Arduino and MicroPython settings. I just started to test my stock, and found these four that fail.

So, all in all, is there a way to get them going again?

Hi all, I have a lot of ESP32s due to the courses I give at a University of Applied Sciences. However, 4 of them behave rather bad. They do accept upload, but then enter a boot loop with this output: rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,...

This looks very promising indeed, many thanks for your reply! The two sets of ultrasound sensors are in two separate doorways in a back to back layout. I will look into the example code in the morning. I figured out a backup plan of using two Arduinos to handle the measurements, and passing their da...

Hi all, I have a question on using two HC-SR04s independently. Our University has two doors and we want to count people going in and out. Doing one door is rather easy with two HC-SR04s sensing distance change and checking the millis when this occurred, and that is no problem to decipher which direc...

Yes, it does go away when I pull the USB out. I don't have a UART coupler, so it priobably remains for me to discard the circuit. Thank you for helping my troubleshooting.