Rebounder Tech Blog

Written by the people who actually run these systems in production.

Digital Signage

Implementing and operating signage on Android devices locked into kiosk mode.

copyOneDay Overwrite Silently Drops Pinned Notices2026-09-19if/else-if as Kotlin's ?.let Return Value Requires else2026-09-08Hand-Built Preview Payload Drifts From the Device2026-09-04insetsController Is null Before setContentView2026-09-01One startActivity Is Not Enough to Blank a Kiosk Screen2026-09-01Media Queries See the Real Viewport in a Scaled Stage2026-08-30An Android Foreground Service Can Die Without Crashing2026-08-17The JMA Evening Update Nulls Today's Temperature2026-08-16FLAG_KEEP_SCREEN_ON Ignored: It's the Screensaver2026-08-16Putting ESP32 Sensor Data in the Browser With Web Serial2026-08-15Running a Google TV Kiosk for Several Months2026-08-15Building a Power Factor Meter With a Raspberry Pi Pico2026-08-15Google TV or Raspberry Pi for a Signage Device2026-08-15Reading a SwitchBot Motion Sensor Over BLE Directly2026-08-15