Configuration files for the microcontrollers I have doing various tasks using
esphome. I'm making use of !include directives to try to
limit duplication as much as I can.
In the /common directory you'll find small YAML chunks intended to be included
in other files. Some files (e.g. esp8266.yaml) simply !include other files
common to that specific board or model. Inside /common/includes there is a
trivial example of how custom C++ code beyond a lambda can be included in
a project.
The host devices/microcontrollers I'm using:
I'm using a DHT22/AM2302 temperature and humidity sensor for measuring temperature and humidity in a few rooms. So far they seem to be about as accurate as the Nest temperature sensors. These devices require you to solder a 4.7kΩ pull-up resistor on the data line, but the ones from the link above already come with the resistor in place so they can be used right away.
This requires both a K-Type thermocouple and a [MAX6675 thermocouple sensor module)(https://www.amazon.com/dp/B08BHTDPN5). No soldering is required. It seems to be accurate to within a couple degrees Celsius so I wouldn't use it if you need something highly accurate but for an oven sensor it's more than adequate. I've also attached a TM1637 4-digit LED segment display to display the temperature reported by the thermocouple.
Note that everything in ESPHome is in degrees Celsius. If you need degrees
Fahrenheit, /common/includes/temperature.h and
/common/includes/temperature_conversion.yaml have a conversion function.