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Home Assistant setup

  1. Install Home Assistant as container
docker compose up -d

If you need Docker run for Raspbian/Debian/Ubuntu distros:

sudo bash install-docker.sh

  1. Run the steps for ESPHome installation, when completed run step 3

  2. Install the ESPHome integration and in the "host" field, put your esp8266 ip address

ESPHome installation

  1. Install Python on your PC, you can install a specific version by running:
sudo bash install-python.sh 3.11.0
  1. Install pip and venv
sudo apt-get install python3-pip python3-venv -y
  1. Clone repository and activate virtual environment
mkdir -p env
python -m venv env/
  1. Install ESPHome and other requirements
python -m pip -r requirements.txt

  1. Connect esp8266 to your PC using USB cable (buy esp8266 with serial converter integrated)

  2. Edit secrets.yaml to reflect your current wifi network

  3. Move secrets.yaml and sht20.h (only if you use it, otherwise it's not required) to .esphome directory

mv secrets.yaml sht20.h .esphome
  1. The first time you flash esp8266, you need to tell esphome some information about your esp8266 device. Right after that, it will validate the configuration, create a binary, upload it, and start logs
cd .esphome && esphome wizard esphome-config.yaml

Next time you'll flash it, you just need to run:

esphome run esphome-config.yaml
  1. Take note of the ip address printed out in the logs after you run previous command Read all the output and check for sensors errors, if clear come back to Home Assistant installation steps

Sensors

Air

BME280 Temperature + Humidity + Pressure (i2c bus)

SENSOR ESP8266
VIN 3V3
GND GND
SCK SCL
SDD SDA

Soil

SHT20 Temperature + Humidity (i2c bus)

SENSOR ESP8266
RED 3V3
BLACK GND
GREEN SDA
YELLOW SCL

CO2

MH-Z19C NDIR (uart bus - 7pin terminal connection version)

SENSOR ESP8266
PIN4 VIN 5V
PIN3 GND GND
PIN5 RX TX
PIN6 TX RX

DEVICES

Denkovi USB 8CH relay board

DEVICE RPI4
USB USB

POWER

DEVICE REQUIRED POWER SOURCES
Denkovi USB 8CH relay board 12V 1A + 220V
Esp8266 5V 2A
Raspberry Pi 4 5V 2A

WIRINGS

TODO

3D CASES

TODO