Code sync and fixed compile error for Mbed OS5

Dependencies:   DHT

Revision:
3:264755aa4608
Parent:
2:81340dde3444
--- a/main.cpp	Fri Nov 08 04:22:31 2019 +0000
+++ b/main.cpp	Fri Nov 08 04:33:45 2019 +0000
@@ -10,7 +10,7 @@
     float h = 0.0f, c = 0.0f, f = 0.0f, k = 0.0f, dp = 0.0f, dpf = 0.0f;
 
     while(1) {
-        wait(2.0f);
+        wait(2);
         error = sensor.readData();
         if (0 == error) {
             c   = sensor.ReadTemperature(CELCIUS);