DotGlow: LED Matrix Clock

DotGlow is the companion app for DIY LED matrix clocks built with an ESP32 or ESP32-S3 and a MAX7219 8x32 LED display. Set up the clock, change every setting and update its firmware, all from your phone over Bluetooth. No account, no cloud, no ads. ★ SET UP IN TWO MINUTES • Finds DotGlow clocks near you over Bluetooth • Secure pairing: the clock shows a 6-digit PIN on its LEDs • Connect the clock to your WiFi from the app; it gets the exact internet time by itself ★ LIVE LED PREVIEWS The app draws a real-looking LED matrix that shows exactly what your clock shows: the live clock, every digit animation, every effect, your scrolling message and the stopwatch. Change a setting and see the result instantly. ★ EVERY SETTING • 12 / 24 hour, time zone, leading zero, blinking colon, seconds bar, date • 6 digit-change styles: roll down, roll up, dissolve, slide, flip, drop & bounce • Effects every hour and at power-on: sparkle, wipe, rain, boxes, Pac-Man, random • Brightness, night mode (dim or display off), automatic brightness with a light sensor • Your own scrolling message, repeated as often as you like • Special days: birthdays and anniversaries with their own animation • 4 to 16 display modules, module type, mirror, flip and one-tap Rotate 180° ★ STOPWATCH Start, pause and reset the clock's stopwatch from the app, or with an optional push button on the clock. ★ FIRMWARE UPDATES OVER BLUETOOTH Install new firmware without WiFi, in about a minute. ★ INSTALL FIRMWARE ON A NEW BOARD Plug a new ESP32, ESP32-S3 or ESP8266 (NodeMCU) board into your phone with a USB-OTG adapter. DotGlow detects the chip and installs the right firmware. No computer needed. ★ STEP-BY-STEP SETUP GUIDE Parts list, wiring pictures for ESP32-S3, ESP32 DevKit and ESP8266, power tips, chaining more modules, light sensor and stopwatch button, and troubleshooting. ★ PRIVATE AND SECURE • Encrypted Bluetooth (LE Secure Connections), PIN pairing • Optional app lock with PIN and fingerprint • No accounts, no ads, no analytics, no tracking ★ NO CLOCK YET? Tap "Try the demo clock" and explore every screen. DotGlow clocks are DIY hardware: you build them from common parts (an ESP32 board, a MAX7219 4-in-1 LED matrix and a 5 V phone charger). The setup guide in the app shows how. Made with care in India by Manoranjan (manoranjan.dev) · ElectroIoT.