Mqtt Dash Button
|Mqtt Dash Button|
Release status: experimental [box doku]
|Description||mqtt Dash Button low standby current|
U1: ESP8266-F R1: 200 OhmS R2: 10kOhm T1: BC847 Q1: FDN340P S1: Taster
How it works
This is a low power MQTT DIY Dashbutton.
After closing the Switch S1 the ESP start. The first task is to set the GPIO 4 as output and put it to high. No the esp is powered by T1 and Q1. No you can release the Switch. The esp is now publishing the MQTT message. To save energy the GPI0 4 is pulled to gournd and the transistor cut off the supply.