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Update and finish! Well, a Steward, waiting for a very specific acoustic command/signature at table with family.... bad idea. "Erverybody absolutely QUIET!!!!!! .....Salz...(giggle) .... Q I E T... Salz.....", and so on! I quickly changed the Elechous Voicerecognition with a HC-12 SI4463 Wireless Serial Port Module 433Mhz http://www.ebay.de/itm/HC-12-SI4463-Wireless-Serial-Port-Module-433Mhz-Replace-Bluetooth-for-Arduino-/351198720845?hash=item51c513334d:g:WmMAAOSwAHZUQIh3 I ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/salt-cellar-steward