Thanks for the FlexyPin hint. https://lectronz.com/products/esp32-s2-solo-esp32-s3-wroom-flexypin-adapter looks like it might be what I can't find on amazon. edit: it has no usb builtin. They do have a footprint https://github.com/solderparty/flexypin_adapters_hw/tree/main/ESP32-S2_S3-WROOM_flexypin

I'm not sure what those pictures mean. What are you trying to create? I think you want to look at tasks, semaphores, and interrupt handlers. Start simple: make a timer-driver interrupt handler that uses a semaphore to release a task that waits for the semaphore. Print a short message from the task e...

Especially the link at the bottom of the page which will take you to https://github.com/espressif/vscode-esp ... install.md

agree, vs code is a good choice. Especially if you have used MS Visual Studio for development in the past: many of the keyboard short cuts will seem familiar. It's still a long learning curve. I initially found the "flame" tool quite useful, then figured out control-e,d did the same thing...compile,...

see comments viewtopic.php?f=12&t=31822#p110339 about sampling rate. Above ~280K combined sample rate may not do what you expect.

Interesting. I'm doing something very similar and continuous reading 4 channels interleaved on esp32. The interleave pattern was predictable up to about 270K total samples/sec. Above that the pattern gets scrambled, repeating, skipping. I take the raw 16 bit samples and split each sample into a 4-bi...

yes. connect the GNDs on both boards. Probably there is a terrible ground path via the usb to a computer to the building ground, and somehow back to the board. It is a little surprise you get any characters coming through. the TX-out and RX-in signal is with respect to ground.

How long are the TX and RX wires? Good common ground between the test circuits? Good power supplies? You are really brave to try this without a scope. Even an old analog scope (in my case) will give insights about voltage levels, active signals, and noise. I'm in the middle of a similar project, tho...

I'd look for either a leak or memory fragmentation that prevents a large-enough block from being allocated. I used heap_caps_get_info to make a detailed report about memory issues. If the minimum heap is dropping below 50K or so, that might be an issue for the next allocation. Screenshot_2022-12-22_...

@MrKenSan3 thanks! Best research and explanation ever. I was stumbling over how that two transistor circuit worked and got lucky and found this post. I definitely had issues with the boot reliability (~25% chance never gets started) when I used 10uF on the En pin. And maybe 1uF, but way less often.