Overview
This week I dove into embedded programming: I soldered a Seeed XIAO RP2040 onto my milled copper PCB, connected a tiny I²C OLED, and flashed code from the Arduino IDE. After a few uploads and some serial-port sleuthing, the onboard LED finally blinked and the OLED displayed a crisp “Hello world!”.
Takeaways: read the pinout like a map, confirm cables and board settings, and treat error messages as clues. My loop for the week became build → test → break → read → fix → try again—a rhythm that turns small wins into working systems.
Gallery
