https://learn.sparkfun.com/tutorials/esp8266-thing-development-board-hookup-guide/all 22/24
You can add analog output sliders, digital input monitors, and analog input gauges.
Using the ESP8266 in Arduino
If you’ve used Arduino in the past, there will be some new programming schemes to get used to in ESP8266 land. Here are a few of
the most common gotchyas. For a more comprehensive reference, check out the ESP8266 Arduino Reference page.
Pin Mappings
As with any other Arduino, the pin mappings printed on the board match the pin you read or write to. The TX and RX pins can be
referenced as 7 and 8 respectively.
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