Modulo operation used to calculate digits after decimal point,
but if that result is <10, a leading zero wasn't added, giving a
wrong value.
Same as 34c7bec0dc
but on the example app.
No mode was set before the first read by the app.
The first time the app was run, it worked properly, reading
temperature and humidity on the first read(). But subsequent reads
returned humidity only since that was last mode set up.
Also, the ioctl read was returning invalid results.
