DEVLOG #08

I finished the firmware and flashed it onto the ESP32-C3 SuperMini for the
mmWave reference sensor.

It uses the correct UART pins (GPIO20 RX, GPIO21 TX, 256000 baud), parses
all three LD2450 targets using the
official protocol,
and sends timestamped UDP JSON data. It also separates calibration and
reference recordings, supports protected A/B OTA, detects ambiguous
multi-person measurements, and allows configurable radar placement.

The firmware is ready, but the final PCB still needs to arrive. I then need to
solder it before any complete hardware testing can begin. I will also finish
the IKEA-board mount, print the case, and check the PCB fit—especially the
retaining posts.

Next: receive and solder the PCB, print the case, and test everything together.