WiFi Aquarium Water Temp Sensor

I built a second WiFi sensor, this time for my aquarium to monitor the tank water temperature.

This like my Attic Multi-Sensor uses the home automation software Home Assistant with the EspHome plugin.

Instead of reinventing the wheel, I’m just going to refer you to the great Dallas Temperature documentation at the ESPHome website for this sensor for you to see how I went about building mine.

Here is a screenshot of of my water temperature sensor’s graph in Home Assistant:

Hardware

• Wemos D1 Mini clone
• DS18N20 temp sensor

Case

Here are my aquarium sensor case 3D print files and some images below of how the one I built looks.

Software

Here is my “Home Assistant : ESP-Home” yaml config file for my aquarium temp sensor.

# D1-Mini CLONE w/attached DS18N20 waterproof Temp probe
#
substitutions:
  devicename: aquarium_temp_01
  upper_devicename: Aquarium 20gal

esphome:
  name: ${devicename}
  platform: ESP8266
  board: d1_mini

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_pass
  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "${devicename}"
    password: !secret ap_fallback_pwd

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

# Enable Over The Air updates
ota:
  safe_mode: True

# Example configuration entry
dallas:
- pin: GPIO4
  update_interval: 15s

sensor:
  - platform: dallas
    address: 0xCE041662D2CFFF28
    name: ${devicename}_temp
    filters:
      - lambda: return x * (9.0/5.0) + 32.0;
    unit_of_measurement: "°F"

  - platform: wifi_signal
    name: ${devicename}_wifi_signal
    update_interval: 30s

  - platform: uptime
    name: ${devicename}_uptime

binary_sensor:
  - platform: status
    name: ${upper_devicename} Status
    id: ${devicename}_status

text_sensor:
  - platform: version
    name: ${devicename}_esphome_version