Diff: Feuchtigkeitssensor/Chirp.cpp

Revision:

27:bbcd157dcd63

Child:

29:91df2c5fb297

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Feuchtigkeitssensor/Chirp.cpp	Sun May 02 19:50:46 2021 +0000
@@ -0,0 +1,61 @@
+#include "mbed.h"
+#include "Chirp.h"
+ 
+Chirp chirp(D14, D15); 
+ 
+//Chirp Docs are at https://github.com/Miceuz/i2c-moisture-sensor and https://www.tindie.com/products/miceuz/i2c-soil-moisture-sensor/
+void getResults();
+Chirp::Chirp(PinName sda, PinName scl, char slave_adr)
+    :i2c_p(new I2C(sda, scl)), i2c(*i2c_p), address(slave_adr)
+{
+    i2c.frequency(10000);
+    
+}
+
+float Chirp::getCapacitance(){
+    i2c.frequency(10000);
+    short capacitance = 0;
+    char i2cData[2]= {0}; 
+    
+    char dataReg = 1; //Capacitance is stored in 2 bytes at address 0
+    i2c.write(address, &dataReg, 1); 
+    int success = i2c.read(address, i2cData, 2);
+    
+    
+    if(success != 0)
+        return -1000000; 
+    else
+    {
+        //I2C bytes are in different byte order, write into short bytes 0 and 1 in reverse order!
+        *((char*)&capacitance) = i2cData[1];
+        *(((char*)(&capacitance)) + 1) = i2cData[0];
+        return capacitance;
+    }}
+ 
+float Chirp::getTemperature(){
+    i2c.frequency(10000);
+    short temperature = 0;
+    char i2cData[2]= {0}; 
+    
+    
+    char dataReg = 4; //Temperature is stored in 2 bytes at address 5
+    i2c.write(address, &dataReg, 1); 
+    int success = i2c.read(address, i2cData, 2);
+    printf("%i\n\n", success);
+    
+    
+    if(success != 0)
+        return -1000000; 
+    else
+    {
+        *((char*)&temperature) = i2cData[1];
+        *(((char*)(&temperature)) + 1) = i2cData[0];
+        return (float) temperature / 10.0;
+    }    }
+    
+    
+void getResults(){ 
+    printf("test\n\n");
+    printf("Capacitance = %.2f\n", chirp.getCapacitance());
+    printf("Temperatur = %.2f\n", chirp.getTemperature());
+}
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