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Replace paper labels with e-paper displays. Update them via a spreadsheet with the help of the MQTT protocol.
JPEG Image - 1.32 MB - 04/04/2019 at 14:54
JPEG Image - 1.31 MB - 04/04/2019 at 14:54
JPEG Image - 1.35 MB - 04/04/2019 at 14:54
JPEG Image - 1.29 MB - 04/04/2019 at 14:54
Christos Koutsiaris