SPIRITBOX.PRO
Nerd Zone
Build logs and technical write-ups. This is the stuff behind the shop listings — firmware, sensor meshes, and the occasional dead-end.
Radar Node Network
ESP32-C3 radar nodes with OLED displays, built around HLK-LD2402 mmWave sensors, reporting over ESP-NOW to a central CYD hub running unified firmware. [PLACEHOLDER — link to full write-up / repo]
CYD Entity Hub
The unified hub firmware (CYD_Entity_Hub.ino) that aggregates readings from every radar node on the mesh and drives the on-screen display. [PLACEHOLDER]
Aged-Paper Spirit Box UI
Built on a Guition JC3248W535EN (ESP32-S3, 3.5" QSPI touch) with LVGL, styled as a weathered notebook. Multilingual word bank across five languages, radar-sweep visualisation, EVP logging to microSD. [PLACEHOLDER]
Recycled REM Pod Build
A REM pod built from reclaimed ESP32-C3 SuperMini boards and an ILI9341 display, joining the same ESP-NOW mesh as the rest of the line. [PLACEHOLDER]
SpiritBoxRound
A round GC9A01 display driven with LovyanGFX after TFT_eSPI produced Guru Meditation errors on this board. Notes on the debugging process. [PLACEHOLDER]
Composite Video on ESP32
Driving a small B&W CRT directly from an ESP32's DAC/APLL — extensively debugged, currently paused on a suspected clone-chip incompatibility. [PLACEHOLDER]