PT100/PT1000 工业级温度传感器
来自Jack's Lab
目录 |
1 概述
2 ESP8266 ADC
硬件连接:
VCC33 ---> PT1000 <-- (A0) --> 300R 1% ---> GND
void setup() { Serial.begin(115200); } void loop() { int vd = analogRead(A0); Serial.print("vd = "); Serial.println(vd); uint32_t rtd = (1024 - vd) * 300 / vd; Serial.print("rtd = "); Serial.println(rtd); delay(1000); }
3 MCP3421
- 快速测试:
#include <Wire.h> #define MCP3421_ADDRESS 0X68 void setup() { Serial.begin(115200); Wire.begin(); } void loop() { Wire.requestFrom(MCP3421_ADDRESS, 4); if (Wire.available() != 4) { Serial.println("Wire.available failed"); while(1); } int16_t v = (Wire.read() << 8); v |= Wire.read(); // read but ignore status uint8_t s = Wire.read(); //print voltage from channel one in millivolts Serial.print(v);Serial.println(" mv"); delay(1500); }
- 改进:
4 资源
- http://openenergymonitor.org/emon/buildingblocks/rtd-temperature-sensing
- http://forum.arduino.cc/index.php?topic=16731.0
- http://stackoverflow.com/questions/21644642/how-to-connect-pt-1000
- http://41j.com/blog/2015/01/esp8266-analogue-input/