use "arduino-sht" library for sht3x and sht4x

src/library/arduino-sht/examples/sht3xanalog/sht3xanalog.ino

@@ -0,0 +1,27 @@
+#include <Arduino.h>
+#include <Wire.h>
+
+#include "SHTSensor.h"
+
+SHT3xAnalogSensor sht3xAnalog(A0, A1);
+
+void setup() {
+  // put your setup code here, to run once:
+
+  Wire.begin();
+  Serial.begin(9600);
+
+  delay(1000); // let serial console settle
+}
+
+void loop() {
+  Serial.print("SHT3x Analog:\n");
+  Serial.print("  RH: ");
+  Serial.print(sht3xAnalog.readHumidity(), 2);
+  Serial.print("\n");
+  Serial.print("  T:  ");
+  Serial.print(sht3xAnalog.readTemperature(), 2);
+  Serial.print("\n");
+
+  delay(1000);
+}