Fix to firmware check

Author: edspark

examples/Example2_OLED_Distance/Example2_OLED_Distance.ino

@@ -24,7 +24,7 @@
 #include "SparkFun_Qwiic_Ultrasonic_Arduino_Library.h"
 
 // Create an ultrasonic sensor object
-QwiicUltrasonic myUltrasonic(kQwiicUltrasonicFWLatest);
+QwiicUltrasonic myUltrasonic;
 // Creat an OLED object
 QwiicNarrowOLED myOLED;
 
@@ -80,7 +80,7 @@ void loop()
   myUltrasonic.getDistance(distance);
 
   // Convert distance, which is an integer, to char so that we can print it.
-  snprintf(distanceBuff, 4, "%d", distance);
+  snprintf(distanceBuff, 6, "%d", distance);
 
   // Put the distance in a string so that we can also print "mm".
   distanceStr = distanceBuff; 

examples/Example4_ChangeAddress/Example4_ChangeAddress.ino

@@ -17,7 +17,10 @@
 #include "SparkFun_Qwiic_Ultrasonic_Arduino_Library.h"
 
 // Create an ultrasonic sensor object
-QwiicUltrasonic myUltrasonic(kQwiicUltrasonicFWLatest);
+QwiicUltrasonic myUltrasonic;
+// If you're using the older version of the Ultrasonic Distance
+// sensor, then uncomment the line below and comment out the line above.
+//QwiicUltrasonic myUltrasonic(kQwiicUltrasonicFWOld);
 
 // Here we set the device address. Note that an older version of the Qwiic
 // Ultrasonic firmware used a default address of 0x00. If yours uses 0x00,

src/sfeQwiicUltrasonic.h

@@ -40,7 +40,7 @@ class sfeQwiicUltrasonic
     }
 
     /// @brief Default constructor
-   sfeQwiicUltrasonic(uint8_t fwVersion) : _theBus(nullptr), _fwVersion(fwVersion)
+   sfeQwiicUltrasonic(const uint8_t fwVersion) : _theBus(nullptr), _fwVersion(fwVersion)
    {
    }