The Starry Circuit · OLED study no. 128×32

ESPHome Canvas Simulator

Write an ESPHome-style display.lambda, compile its supported C++-like subset to JavaScript, and render it through the same one-bit OLED buffer and firmware glyph engine used by the DBK gallery.

engine loading…

Original DBK display gallery

Click any 128×32 display to render it and reveal its editable code. animate · 20 FPS

ESPHome YAML / display lambda

OLED preview 128×32 → 512×128

Choose one of the 30 DBK gallery displays or edit the lambda directly.

PM1 PM2.5 PM10 Wi-Fi
MQTT

Waiting for engine…

Translated JavaScript

Real ESPHome build & flash backend checking…

Device configuration Flash target

ESPHome: checking… Configuration directory: checking… Serial port: checking…

Select a configuration to see its flashing scope.

The build service is available only from the localhost Python server.

Supported subset: ESPHome drawing calls such as print, printf, strftime, lines, rectangles, circles, and pixels; id(font_*); common DBK sensor IDs; TextAlign::*; numeric declarations; millis(); and basic JavaScript-compatible expressions. The 30 gallery examples run through a trusted d / t / S compatibility surface and remain editable in the lambda panel. This is a local design simulator, not a full C++ compiler or ESPHome validator. Use just lab-sim for authoritative ESPHome compilation.