Make it work. Make it right. Make it fast.| Quentin Santos
The previous series of articles about UART was initially motivated by an error I was getting when using the ESP-Prog. I could have jumped straight to the conclusion, but I took the time to really understand what was going on, and we are finally reaching the end of this investigation. Connecting to “real” UART again … Continue reading The serial TX path seems to be down →| Quentin Santos
How to use “real” UART| Quentin Santos
The mystery| Quentin Santos
The mystery In the previous article, I briefly mentioned a slight difference between the ESP-Prog and the reproduced circuit, when it comes to EN: Focusing on EN, it looks like the voltage level goes back to 3.3V much faster on the ESP-Prog than on the breadboard circuit. The grid is horizontally spaced at 2ms, so … Continue reading Transistors in reverse and redundant circuits →| Quentin Santos
I recently went into a deep dive on “UART” and will publish a much longer article on the topic. This is just a recap of the basics to help put things in context. Many tutorials focus on using UART over USB, which adds many layers of abstraction, hiding what it actually is. Here, I deliberately … Continue reading How to use “real” UART →| Quentin Santos