I forgot to say that when I was close to 100 kHz, that was measured as the frequency of the pin toggle so the ISR was executed closer to 200 kHz. Also some progress with the Teensy 3.2, I maxed it out with the ISR getting executed at 1.26 MHz toggling the pin. I already ordered the newest Teensy 4.2...

Thanks for the replies. For now I'm giving up on this project with ESP32, it's just way too slow, despite running at 240 MHz. The best I could achieve was about 100 kHz and the jitter was really bad, and that's even without ESP-IDF and just running basic arduino code. I'm sure I can still improve up...

Hi, I want to record a whole bunch of UARTs, I'm thinking at least 8. I only care about RX. I will probably use the hardware UART to transmit all the data from the 8 or more input UARTs. I need to be able to bitbang them because as you know, there aren't enough UARTs. The baud is 115,200. My goal is...

Any luck with this?