This is an unauthorized and unoffical firmware for the Emporia View Utility Connect device that reports energy usage to Home Assistant and completely divorces the device from Emporia's servers.

Disclaimer

There is no guarantee of quality. When you install the software on your device, it will no longer report data to Emporia. You should backup the original Emporia firmware before installing this.

Backup the original firmware

Determine which COM device your USB to serial adapter is and use it in the below command(s). Typically a single digit number. (e.g. COM3)

Backup:

.\esptool --port COM# --chip esp32 -b 115200 read_flash 0x0 0x400000 .\vueUtilityConnect_stock.bin

Restore:

.\esptool --port COM# --chip esp32 -b 115200 write_flash --flash_freq 80m 0x0 .\vueUtilityConnect_stock.bin

Installation

Connect a your USB to serial adapter to the port marked "P3" as follows:

Pin	Description	USB-Serial port
1	IO0	RTS
2	EN	DTR
3	GND	GND
4	TX	RX
5	RX	TX
6	+5v	+5v

Note that pin 6 (the pin just above the text "EmporiaEnergy") is 5 volts, not 3.3v. Use caution not to apply 5V to the wrong pin or the magic smoke may come out. You may want to not connect pin 6 at all and instead plug the device into a usb port to provide power, a portable USB battery pack works well for this.

Instead of connecting IO0 and EN, you can simply short IO0 to ground while connecting power to get the device into bootloader mode.

Use either YAML file in the example_yaml directory and modify it to your liking.

Execute esphome run vue-utility.yaml or esphome run vue-utility-solar.yaml to build and install.

Meaning of LEDs

There are three LEDs on the device, which have "power", "wifi" and "link" icons stenciled on the case.

Power = An ESPHome status led. Slowly flashing means warning, quickly flashing means error, solid on means OK. See status_led docs.
Wifi = Normally solid on, will briefly flash each time a meter rejoin is attempted which indicates poor signal from the meter.
Link = Flashes off briefly about once every 5 seconds. More specifically, the LED turns off when a reading from the meter is requested and turns back on when a response is received. If no response is received then the LED will remain off. If this LED is never turning on then no readings are being returned by the meter.

More Details

Check out the docs directory for technical details!