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made a nice Mumble indicator with my M5Stack, which is an incredibly adorable ESP32 with 5x5 rgb leds, ir transmitter, pushbutton in the screen, accelerometer, all in a nice package.
It pings the #hackerspace mumble server for connected user count, and displays it in a fading rgb animation, made the font myself too :D
oh yeah and code is at https://github.com/revspace/mumble-ping-esp32/
and the m5stack is https://m5stack.com/products/atom-matrix-esp32-development-kit