void loop() { // read the input on analog pin 0: int sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 1...
认识引脚类型-ADC引脚 ADC:Analog-to-Digital Converter,模拟数字转换器 Digiital数字信号:数值只有1跟0表示,一般1表示有,0表示无。以灯来说,就是亮(1)与不亮(0) Analog模拟信号:数值是一个范围、有大有小,以灯来说,就是最亮(1000),中等亮(500),不亮(0) ADC用于将模拟信号转换为数字信号,简单说,就是把...
const int DHTPin = 23; intanalog_value; //variable used to receive the analog signal from sensor (from 100 to 10000) int dig_value; //variable used to receive the digital signal from sensor int gas_limit = 0; //used to indicates the minimum value toactive the gas sensor (that value...
Serial.printf("GPIO2的电压值为:%d",analogValue); // 延时一段时间继续读取 delay(1000); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. // 读取esp32内部的霍尔传感器 // hallRead() // 在初始化函数内初始化esp32 void setup...
//Just a super basic analog read sketch int sensorPin = 3; int sensorValue = 0; void setup() { // declare the sensorPin as an input doesnt change anything: Serial.begin(115200); } void loop() { // read the value from the sensor: ...
ADC:Analog-to-Digital Converter,模拟数字转换器 Digiital数字信号:数值只有1跟0表示,一般1表示有,0表示无。以灯来说,就是亮(1)与不亮(0) Analog模拟信号:数值是一个范围、有大有小,以灯来说,就是最亮(1000),中等亮(500),不亮(0) ADC用于将模拟信号转换为数字信号,简单说,就是把我们感知到的亮度,变成...
void analogSetWidth(uint8_t bits); ADC 连续模式 ADC 连续模式是一种 API,设计用于在后台对多个引脚执行模拟转换,具有在完成这些转换后接收回调以访问结果的功能。 该API 允许您指定单个周期内每个引脚所需的转换次数及其相应的采样率。该函数的结果analogContinuousRead是一个结构体数组adc_continuous_data_t。这些...
风扇采用的是5V,0.2A的小风扇模块。此模块在此系统有两个用处,一是微信小程序控制风扇的开关,二是温度过高自动打开风扇降温。 4.直接上代码 4.1.1、设备怎么连上网 #include <WiFi.h> const char* ssid = "baby"; //wifi名称 const char* password = "13456789";//wifi密码 ...
Channel A can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively, when a 5V supply is connected to AVDD analog power supply pin. Channel B has a fixed gain of 32. The same function is used to select the...
Repository files navigation README ESP32AnalogRead Load the calibration data and provide a calibrated analog read Supported Versions ESP32 ESP32-S2 ESP32-S3 Documentation by Doxygen ESP32AnalogRead DoxygenAbout Load the calibration data and provide a calibrated analog read Resources Readme Activity ...