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I totally agree with you, making your own amazon echo using a matrix creator is too expensive
nice tutorial. you could also add how to connect the OLED display to the esp8266
thanks for the info. so you:1. removed the regulator of the Arduino Pro Mini2. removed the power LED3. reduced the internal oscillator frequency from 8 to 1MHz to operate at 1.8VThis way you reduced power consumption (Arduino) from 4.8mA to 6uA, resulting 10 years from 2 AA batteries.I also noticed (from the door_window_sensor.ino) that you are using interrupts to wake the arduino on event (reed switch opened = door opened), otherwise the arduino is sleeping.So the 10 years life can also be affected by how many door openings happens in between.anyway, nice tricks!
Hi! great tut! Could you clarify "Properly configured sensor could work between 5 and 10 years on 2 AA batteries." ?
how long will the battery last?