Mqtt Dash Button

From The Munich Maker Lab's Wiki
Revision as of 02:23, 19 January 2019 by Demotape (talk | contribs) (Created page with "{{project |name = Mqtt Dash Button |status = experimental |image = mqttdashbutton1.jpg |description = mqtt Dash Button low standby current |author = U...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Mqtt Dash Button

Release status: experimental [box doku]

Description mqtt Dash Button low standby current
Author(s)  tobi
Platform  Arduino


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.