typos & example

Author: ladyada

Adafruit_MAX31865.cpp

@@ -1,7 +1,7 @@
 /*************************************************** 
-  This is a library for the Adafruit Thermocouple Sensor w/MAX31865
+  This is a library for the Adafruit PT100/P1000 RTD Sensor w/MAX31865
 
-  Designed specifically to work with the Adafruit Thermocouple Sensor
+  Designed specifically to work with the Adafruit RTD Sensor
   ----> https://www.adafruit.com/products/3328
 
   This sensor uses SPI to communicate, 4 pins are required to  

examples/max31865/max31865.ino

@@ -0,0 +1,72 @@
+/*************************************************** 
+  This is a library for the Adafruit PT100/P1000 RTD Sensor w/MAX31865
+
+  Designed specifically to work with the Adafruit RTD Sensor
+  ----> https://www.adafruit.com/products/3328
+
+  This sensor uses SPI to communicate, 4 pins are required to  
+  interface
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.  
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Adafruit_MAX31865.h>
+
+// Use software SPI: CS, DI, DO, CLK
+Adafruit_MAX31865 max = Adafruit_MAX31865(10, 11, 12, 13);
+// use hardware SPI, just pass in the CS pin
+//Adafruit_MAX31865 max = Adafruit_MAX31865(10);
+
+// The value of the Rref resistor. Use 430.0!
+#define RREF 430.0
+
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Adafruit MAX31865 PT100 Sensor Test!");
+
+  max.begin(MAX31865_3WIRE);  // set to 2WIRE or 4WIRE as necessary
+}
+
+
+void loop() {
+  uint16_t rtd = max.readRTD();
+
+  Serial.print("RTD value: "); Serial.println(rtd);
+  float ratio = rtd;
+  ratio /= 32768;
+  Serial.print("Ratio = "); Serial.println(ratio,8);
+  Serial.print("Resistance = "); Serial.println(RREF*ratio,8);
+  Serial.print("Temperature = "); Serial.println(max.temperature(100, RREF));
+
+  // Check and print any faults
+  uint8_t fault = max.readFault();
+  if (fault) {
+    Serial.print("Fault 0x"); Serial.println(fault, HEX);
+    if (fault & MAX31865_FAULT_HIGHTHRESH) {
+      Serial.println("RTD High Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_LOWTHRESH) {
+      Serial.println("RTD Low Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_REFINLOW) {
+      Serial.println("REFIN- > 0.85 x Bias"); 
+    }
+    if (fault & MAX31865_FAULT_REFINHIGH) {
+      Serial.println("REFIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_RTDINLOW) {
+      Serial.println("RTDIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_OVUV) {
+      Serial.println("Under/Over voltage"); 
+    }
+    max.clearFault();
+  }
+  Serial.println();
+  delay(1000);
+}