Display & touch ↗
Build a dashboard, calculator, control panel or number pad.
ImplementedThe Freenove FNK0104B, explored
A small board.
A lot to build.
A practical guide to your ESP32-S3 display: what it can do, how to use it, and what building a Codex monitor taught us.
320 × 240 landscape · captured 4 October 2026
2.8″IPS display + capacitive touch
ESP32-S3Wi-Fi + Bluetooth LE
16 + 8 MBFlash + PSRAM
Voice-readyOnboard microphone + codec
Start with a possibility
What would you like to make?
Bluetooth LE & Web Bluetooth ↗
Configure a powered board from a browser, without another firmware upload.
ImplementedNVS, flash, PSRAM & SD ↗
Understand which data survives a reboot, an update or a power loss.
ImplementedWake words, commands & on-device ML ↗
Say a wake phrase and control the board without a cloud service.
ImplementedScreen inactivity & wake ↗
Make an always-on appliance quieter without losing its connection.
ImplementedUSB emoji and number-pad keyboard ↗
Use the touchscreen as a wired USB keyboard, with number-pad keys and OS-specific emoji shortcuts.
Device-verifiedOne project, many lessons
Meet the Codex monitor.
Usage at a glance, with reset timers when an allowance runs out. Agent activity on your desk. Local voice commands and a message path through your own bridge.
See the screens and the setup →Build by describing behavior.
Each capability guide includes a brief you can give a coding agent, a small diagnostic to start with, and the limits of what has actually been tested.
Follow the build journal →