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EnergySmart Bridge

MQTT bridge for the Lowe's EnergySmart Water Heater WiFi Controller. This controller supports a number of A.O. Smith and Whirlpool water heaters. It might be compatible with the Kenmore Smart Electric Water Heater Module.

Requirements

  • Docker
  • DNS for energysmartwaterheater.com needs to be redirected to your docker host IP address
    • pfSense - Add Host Override on the DNS Forward or DNS Resolver service
    • VyOS - set system static-host-mapping host-name energysmartwaterheater.com inet x.x.x.x
  • Port 443 available on your docker host

How it Works

The controller posts the status of the water heater every five minutes to https://energysmartwaterheater.com. Any queued setting changes are returned in the json response. Due to the controller not accepting a client certificate request and no way to disable in mono, nginx is used as a reverse proxy. Also note the controller only accepts a sha1 certificate.

Docker

  1. Clone git repo and build docker image
git clone https://github.com/excaliburpartners/EnergySmartBridge.git
cd EnergySmartBridge
docker-compose build
  1. Configure the MQTT server environment variables
vim docker-compose.yml
  1. Start docker containers and verify connectivity
docker-compose up

MQTT

This module will also publish discovery topics for Home Assistant to auto configure devices.

SUB energysmart/MAC/uppertemp_state 
SUB energysmart/MAC/lowertemp_state 
int Current temperature 

SUB energysmart/MAC/systeminheating_state 
string OFF, ON

SUB energysmart/MAC/hotwatervol_state 
string High, Medium, Low

SUB energysmart/MAC/maxsetpoint_state 
SUB energysmart/MAC/setpoint_state  
PUB energysmart/MAC/setpoint_command    
int Temperature setpoint

SUB energysmart/MAC/mode_state  
PUB energysmart/MAC/mode_command  
string EnergySmart, Standard, Vacation

SUB energysmart/MAC/dryfire_state 
SUB energysmart/MAC/elementfail_state 
SUB energysmart/MAC/tanksensorfail_state 
string None

SUB energysmart/MAC/faultcodes_state
int

SUB energysmart/MAC/signalstrength_state 
int WiFi signal in dBm

SUB energysmart/MAC/updaterate_state 
PUB energysmart/MAC/updaterate_command
int Seconds between updates