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...
https://forum.arduino.cc/t/read-a-4-20ma-pressure-sensor-with-esp8266/555122/5 电路示意图 由于采用esp32,电压最高3.3V,因此选择电阻值为166欧(100+22+22+22)。 读取电压程序如下 const int Analog_channel_pin= 15; float ADC_VALUE = 0; float voltage_value = 0; void setup() { // put y...
analogSetAttenuation() & analogSetPinAttenuation() 设置引脚的衰减倍数,对应不同的电压检测范围,analogSetAttenuation()用于改变所有引脚衰减倍数,它通过直接改变__analogAttenuation全局变量的值,实现引脚初始化时的改变。 而analogSetPinAttenuation()则是对指定的引脚进行设置。要注意每个衰减倍数所对应的范围,在默认情...
点击“确定”后,你将在Thonny窗口底部看到MicroPython Shell。 此时你可以使用Read-Evaluate-Print-Loop(REPL)进行串口连接,这使你可以输入单行代码并立即在Shell中运行,非常方便调试代码。如果你遇到程序问题,无法理解为什么出现错误,可以通过REPL进行交互式调试。更多信息请参考REPL。 与REPL交互时,可以使用help()命令来...
Version 1.1 (2016 October 15) AnalogLamb ESP32-WROVER Breakout Board Buttoned breakout board for the Espressif ESP32-WROVER module footprint. Board label name reads “ESP32-WROVER & ALB32R Breakout”. Pinout Size: 25 mm × 18 mm × 3 mm Black Electronics ESP32 Module Breakout Board Simple...
Serial.begin(115200); } void loop() { // read the value from the sensor: sensorValue = analogRead(sensorPin); Serial.println(sensorValue); delay(100); } Debug Messages: it compiles and uploads perffectly 👍 2 kramzarales changed the title ESP32-C3 cant read all analog values woth ...
The hallRead() function is used to get value for the HALL sensor (without LNA). Hall Sensor output is connected to pins 36(SVP) and 39(SVN) void analogSetVRefPin(uint8_t pin) The analogSetVRefPin() function sets the pin to use for ADC calibration or to set a reference voltage for...
MIT"""CircuitPython Essentials Analog In example"""模拟输入例子"""importtimeimportboardfromanalogioimportAnalogIn# 初始化,绑定引脚analog_in=AnalogIn(board.A0)# 读取引脚函数defget_voltage(pin):return(pin.value*3.3)/65536whileTrue:# 打印引脚值print((get_voltage(analog_in),))time.sleep(0.1) 今天...
I created a simple several stage voltage divider to read on. Source was the 3.3V output pin of the ESP WROOM 32. Then I applied 3 different steps with 4.7K 1% tolerance resistors. Values measured with the multimeter: P1: 3.286V --> Expected = 4095 / ADC output = 4095 ...
floatreadBatteryVoltage {intanalogValue = analogRead(ANALOG_PIN);floatvoltage = (analogValue / (float)ADC_MAX) * REF_VOLTAGE;// Voltage divider scalingvoltage = voltage * (10.5+ 10) / 10.0; // (R1 + R2) / R2returnvoltage;}// Function to calculate battery percentage float calculateBattery...