Move to _data along with some misc clean-up.

README.md

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+# esphome
+
+## esp32
+
+[docs](https://esphome.io/guides/getting_started_command_line.html)
+
+Just start with an existing yaml, such as base_esp32.yaml.
+
+Plug it in to laptop, then run:
+
+```sh
+docker run --rm -v "${PWD}":/config --device=/dev/ttyUSB0 -it esphome/esphome base_esp32.yaml run
+```
+
+Then set static IP in router.
+Then in [esphome on server](http://wildebeest:6052/) create same thing, add static IP block, then upload.
+Should now be online.
+
+## Hardware
+
+### irf520
+
+[pin-out](https://protosupplies.com/product/irf520-n-ch-mosfet-module/)
+
+#### 1 x 3 Male Header
+
+SIG = Signal input (active HIGH).  Typically used with 5V logic.  Can be driven at up to 10V to fully turn on the IRF520.
+VCC = No connection
+GND = Digital ground.
+
+#### 1 x 2 Screw Terminal (Load)
+
+V+ = Connect to positive lead of load (motor, LEDs, fan, etc)
+V- = Connect to negative lead of load
+
+#### 1 x 2 Screw Terminal (Power)
+
+VIN = Connect to power supply (0-24V) being used to power the load
+GND = Connect to power supply ground