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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
@user50035 yes, it'll work perfectly. The only thing I'd say is that when you start combining the matrices it'll be more difficult if you combine them in more than one direction. To do that you'd just want to add one connection to Espruino for each row of modules. Either that or if it became a real problem I could modify the firmware.