What's eUmYum ?
Basically it's a "magic button" to call my teenagers when it's lunch time
Well...Yet another ESP8266 magic button ???
Yes but quite new concept
What's new is the power saving function. If you know a little about ESP8266 then you should know that even in "DeepSleep mode" it drains quite a lot on the battery.
I have thus decided to cut the bat with a P-Mosfet so that when "Off" it is really "Off".
What's new also is the usage of Google Cloud Messaging to send notifications everywhere in the world to any device registered to this button.
The configuration is done on the phone and sent to the device. So the phone connects to GCM, sends the projectID, gets the device ID, sends it to the button. Then when connecting the button will send the Project key + list of registered smarphones (device ID) + the message itself
The integration into the button is done without damaging the case (3 leds button on ebay)
Then the ESP8266 and the PCB are trimed in order to fit into the triangle left place. That's it
Ok no more chat, see the video
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