LilyGo T Display S3

LilyGo T-Display S3

Part of Claude Usage Stick. The biggest small-format screen in the lineup — a 1.9" LCD driven over a fast 8-bit parallel bus, with two front buttons and a battery connector.

Specs

MCU	ESP32-S3 (dual-core, WiFi, 8 MB PSRAM)
Display	1.9" ST7789 LCD, 320×170, 8-bit parallel
Battery	External via JST connector (not included)
Buttons	Button A (BOOT, GPIO 0) · Button B (KEY, GPIO 14)
Firmware	✨ Dust (v3.0.3) — display tier L (reference board)
PlatformIO env	tdisplay-s3
Buy	aliexpress.com

Flash

Easiest: open the web flasher in Chrome, Edge or Firefox, pick this board, and plug it in over USB-C.

From source, with the PlatformIO CLI:

pio run -e tdisplay-s3 -t upload     # firmware

This env is for the regular LCD variant. For the 1.91" AMOLED version, use tdisplay-s3-amoled.

Controls

Context	Gesture	Action
PIN entry	A tap / B tap	Cycle the current digit / confirm it — or unlock from a browser instead
Screens	A tap	Next screen (dashboard → chart → news → clock)
Screens	A held ≥ 0.6 s	Flip screen 180° (saved)
Screens	B tap	Cycle brightness (saved)
Screens	A+B together	Force refresh
On boot	Hold A+B	Factory reset (wipes all stored data)

Refresh happens automatically on the poll interval. Everything else — display mode, timezone, refresh interval, token rotation, WiFi — lives in the web panel.

Notes

• As the tier L reference board, the dashboard shows the 5H/7D reset countdowns in large type on their own row below the bars, and the MODELS section shows a row of labelled Clawd mascots (Haiku / Sonnet / Opus / Fable), each blinking while healthy — see Display tiers.
• Dust adds three more screens — 7-day chart, Anthropic news, and a desk clock — plus the web panel and mDNS (claude-usage-stick.local).
• v3 uses the board's full 16 MB flash (the app partition grew 5×) and enables the 8 MB PSRAM. Updating from v2 via the web flasher keeps your settings; a clean erase re-runs setup.
• During setup, the WiFi AP password is shown on the device screen. If the device can't reach your WiFi at boot (moved house, new router), it opens a recovery AP after ~1 min where you fix the WiFi without losing token, PIN or settings.

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LilyGo T Display S3 · env tdisplay-s3 · All boards · Flashing · Setup and daily use · Troubleshooting