Lety — Pisces Moon IDE

How This Works

Lety is a live development environment for Pisces Moon OS. Currently targeting four real devices — LilyGO T-Deck Plus, LilyGO T-LoRa Pager, M5Stack Cardputer ADV, and the LCDwiki C28P — plus the KodeDot as a hypothetical fifth target for apps designed to port across ecosystems.

Multi-Device Preview

Use the device selector above the preview canvas to switch between targets. Canvas dimensions, available input methods, and hardware constraints all update live. Your #ifdef DEVICE_* blocks are preprocessed before transpilation, so the device-specific branches in your code run faithfully in the preview.

T-Deck Plus (320×240) — Trackball + QWERTY + touch. The original.
T-LoRa Pager (480×222) — Rotary encoder + keyboard. No touch.
Cardputer ADV (240×135) — Keyboard only. NO PSRAM, 320KB SRAM.
C28P (240×320 portrait) — Touch only. Audio I/O. Desk kiosk form factor.
KodeDot (480×480) — D-pad + touch. Hypothetical port.

Two Modes

Built-in App — A .cpp file that compiles into the OS. Wired into apps.h and launcher.cpp on export.
ELF Module — A standalone module loaded from the SD card at runtime. Compiled separately, drops into ./sd/apps/.

Live Preview

Your code runs in a JavaScript interpreter that emulates the Pisces Moon HAL exactly. The same source compiles for real hardware via PlatformIO.

Supported in preview:

Display: gfx->fillScreen, fillRect, drawRect, drawLine, drawCircle, fillCircle, setCursor, setTextColor, setTextSize, print, println, printf.
Touch: get_touch(&tx, &ty).
Trackball: update_trackball(), update_trackball_game().
Keyboard: get_keypress().
Timing: delay(ms), millis(), yield().
Theme: all C_* color constants.

Not in preview, but compiles for hardware:

WiFi, BLE, LoRa, GPS
SD card I/O
Audio
Custom libraries

Build & Flash to Hardware

The ⚡ Build & Flash button is the moonshot — it sends your source to the cloud build service, returns a compiled .bin, and flashes it directly to your T-Deck via Web Serial.

Requires: Chrome, Edge, or Opera on desktop. T-Deck connected via USB-C. No PlatformIO install needed on your machine.

Export

The Export button generates the final .cpp with proper AGPL header, plus a sidecar integration.txt with exact instructions for adding to apps.h and launcher.cpp.

Controls in Preview

Input mapping depends on the selected device. The hint bar below the canvas updates when you switch devices.

T-Deck Plus	Mouse=Touch · Arrows=Trackball · Right-Alt+Enter=Click · Type=Keys
T-LoRa Pager	Arrows ↑↓=Rotary scroll · Enter=Rotary click · Type=Keys · no touch
Cardputer ADV	Type=Keys · Arrows=D-pad/cursor · no touch
C28P	Mouse=Touch · no keyboard · Native portrait
KodeDot	Mouse=Touch · Arrows=D-pad · Enter=A · Shift=B