Two flashers, one page. Pick the device that fits your venue — flash from the browser, no Arduino IDE, no soldering. Chrome / Edge required
FULL licence required. Hardware display integrations are gated to the £8 lifetime tier (and 30-day trial). LITE can flash the firmware, but KUMA Timer won't push to it.
1. Generate your Poll URL cloud mode only
Only needed if the LED device will be on a different Wi-Fi than KUMA (e.g. tour bus / remote venue). Local-Wi-Fi setups skip this step.
Type your licence key above — URL appears instantly. Key never leaves your browser (HMAC-SHA256 computed locally).
Ulanzi TC001 RECOMMENDED
8×32 RGB LED matrix · ~£35 · ESP32
Big bright LED clock face, readable across a venue. Custom KUMA firmware replaces stock AWTRIX 3 — no widgets, no Home Assistant cruft, just timer + scrolling SMS + progress bar.
Buttons: Left/Right toggle LOCAL ↔ CLOUD · Hold-right 1.5 s = WIFI SETUP
Display: Big-digit timer face, scrolling SMS, progress bar, font/bg colour
2. Flash firmware
Web Serial not supported. Open in Chrome 89+ or Edge on desktop.
Page must be served over HTTPS.
Plug TC001 via USB-C, click Install — no boot button to hold (CH340 auto-resets). ~60 s, continuous beep is normal.
ESP32-S3-BOX-3 HIGH-RES
320×240 IPS LCD · ~£40 · ESP32-S3
Crisp colour LCD that mirrors KUMA's display pixel-for-pixel — same background colour, digit colour, colour zones, overtime blink. Drop-in replacement for an iPad on a stand.
● LOCAL onlyCLOUD — n/a
Modes: LOCAL Wi-Fi push only (must share SSID with KUMA host)
Latency: ~20 ms (UDP broadcast on port 36701)
Setup: Hold BOOT + tap RESET → download mode → Install
Display: Full mirror of host face (digits + clock + zones + SMS)
2. Flash firmware
Web Serial not supported. Open in Chrome 89+ or Edge on desktop.
Page must be served over HTTPS.
Hold BOOT, tap RESET, release BOOT → click Install. ~60 s.
Side-by-side comparison
TC001 LED
S3-BOX LCD
Hardware cost
~£35
~£40
Resolution
8×32 RGB
320×240 IPS
Visible at distance
★★★ across room
★★ at desk
Pixel-perfect mirror of host face
no — own digit font
yes
Local Wi-Fi (LAN push)
✓
✓
Cloud relay (cross-network)
✓
—
Battery
built-in Li-Po
USB-C only
Mount
stand or wall
tripod / desk
Best for
venue clock visible to talent
director / FOH desk monitor
3. Set it up ~5 min
After flashing, both devices show a Wi-Fi setup hotspot. Join it, enter your home Wi-Fi credentials (+ Poll URL for TC001 cloud), save. Then enable the integration in KUMA Settings → Connections.