An explanation of the ESP8266's ADC characteristics: 10-bit resolution, a single pin, and the voltage range difference between NodeMCU and the bare chip.
A step-by-step guide to setting up the Arduino IDE for NodeMCU boards, from installing the board package to your first Blink test.
Use nearby Wi-Fi network scanning and a cloud geolocation service to estimate a geographic location with NodeMCU, no GPS module required.
Build a soil moisture measurement system with a NodeMCU board and display the result on an LCD screen, with calibration tips for better accuracy.
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