Esp8266 Arduino programming example ADC

ADC

ESP8266-12E There is an easy to access ADC Pin , This article will demonstrate how to collect ADC Pin level value .

ESP8266 ADC The resolution is 10 position , It means , It can be downloaded from ADC The range of values read by the pin is 0~1023.

If you use bare chips ,ESP8266 ADC The input voltage range of the pin is 0 To 1V. However , majority ESP8266 Development boards are equipped with internal voltage dividers , Therefore, the input range is 0 To 3.3V. therefore , To make a long story short ：

• ESP8266 In the development board ADC Voltage range ：0 to 3.3V（ for example ：ESP8266 12-E NodeMCU Kit、WeMos D1 Mini、…）
• ESP8266 In the chip ADC Voltage range ：0 To 1V（ for example ：ESP-07 chip 、ESP-12E chip ……）

ESP8266 NodeMCU Of ADC The pins are as follows ：

1、 Hardware preparation

• ESP8266 NodeMCU Development board
• One potentiometer
• 100 Ohmic and 220 One ohmic resistor ( If you use bare chips )
• There are several DuPont lines
• A data line

2、 Software preparation

• Arduino IDE or VSCode + PlatformIO

In the previous article , How to build ESP8266 The development environment is introduced in detail , Please refer to ：