Do you use an electric dryer and need a solution to send voice notifications when the cycle is complete? Let's build a simple non-invasive DIY sensor that monitors the electrical draw from the dryer using a Wemos D1/NodeMCU, a couple resistors, capacitor and a split core current transformer. You can also apply this same project to many other electrical monitoring projects in the home.
Parts List
Split Core Current Transformer
Wemos D1 Mini
10µF Capacitor
10k Resistors
Preformed Jumpers
Breadboard
Alternative NodeMCU 8266
Alternative NodeMCU 8285
Connect with Us
Patreon - https://www.patreon.com/digiblurDIY
Discord - https://discord.gg/bNtTF2v
Misc Links
Wiring Diagrams and Arduino Sketch - https://github.com/digiblur/digiDryerMon
Arduino IDE Download - https://www.arduino.cc/en/Main/Software
AsyncMQTT - https://github.com/marvinroger/async-mqtt-client
ESPAsyncTCP - https://github.com/me-no-dev/ESPAsyncTCP
Boards Manager Address for Arduino IDE Config:
http://arduino.esp8266.com/stable/package\_esp8266com\_index.json
Sample Home Assistant Config
sensor:
- platform: mqtt
name: "Dryer Current"
state_topic: "digiDryerMon-4A443E/SCT"
unit_of_measurement : "A"
icon: mdi:flash-circle
availability_topic: "digiDryerMon-4A443E/LWT"
payload_available: "Online"
payload_not_available: "Offline"
- platform: mqtt
name: "DryerMon Signal"
state_topic: "digiDryerMon-4A443E/RSSI"
unit_of_measurement: "dBm"
availability_topic: "digiDryerMon-4A443E/LWT"
payload_available: "Online"
payload_not_available: "Offline"
- platform: mqtt
name: "DryerMon Status"
state_topic: "digiDryerMon-4A443E/BUILD"
availability_topic: "digiDryerMon-4A443E/LWT"
payload_available: "Online"
payload_not_available: "Offline"
Sample Home Assistant Voice Notifications from the S31 Video - https://www.digiblur.com/2018/11/smart-laundry-notifications-with-sonoff.html