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可在安卓获取RetroWatch: smart watch client的历史版本
RetroWatch是开源的Arduino智能手表的DIY项目。
RetroWatch is open source smart watch project using Arduino and Android.
This app only supports Android v4.3 or over to enable Notification service. If you are using Android under v4.3, search [RetroWatch LE] at PlayStore or use below link. But RetroWatch LE doesn't support Notification service.
https://play.google.com/store/apps/details?id=com.hardcopy.retrowatchle
Check details about RetroWatch project at below link:
https://github.com/godstale/retrowatch