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Max 6675 Thermocouple in Esphome

September 10, 2022 in Home Automation1 minute

Thermocouples are handy for accurate measurement at difficult to reach places or in liquids. I set up one to measure the temperature of my aquarium so that I can get early warning if the heater fails in my tropical fish tank. MAX6675 is very cheap and easily integrates with Esphome. Here are the connections and code.

Connection:

MAX6675ESP 8266D1 Mini terminal
SOMISOD6
CSCSD8
SCKCLKD5
VCC3.3V
GNDGNDGND

Code

esphome:
  name: aquatemp
  platform: ESP8266
  board: d1_mini

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
  password: "****"

wifi:
  ssid: "****"
  password: "****"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Aquatemp Fallback Hotspot"
    password: "****"

captive_portal:

# configuration entry
spi:
  miso_pin: D6
  clk_pin: D5

sensor:
  - platform: max6675
    name: "Aquarium Temperature"
    cs_pin: D8
    update_interval: 60s
ESPhome