Need some help with "const float"

Projects Programming
1

Hi, in the Sketch below, the wind direction is shown in letters but I'd like to also have the actual compass heading from the array of Floats.

I tried things like this

  Serial.print(winddirections[dataBytes[4] & 0x0F]);
// or
  int winddir = dataBytes[4] & 0x0F;
  Serial.print(winddirections[winddir]);
// or
  int winddir = dataBytes[4] & 0x0F;
  Serial.print(winddirections[winddir],2);

But, I keep getting weird numbers like "S = 180.00175" even though I thought I had defined it to 2-places.

Where am I going wrong?

Oooops, Sketch was rejected as too big to include as text, so have attached it.

WeatherStation.ino (22 KB)

2 
  int winddir = dataBytes[4] & 0x0F;

Have you tried printing the value of winddir ?
What range of values do you get ?

3 
const float winddirections[] = { 315.0, 247.5, 292.5, 270.0, 
                                 337.5, 225.0, 0.0, 202.5,
                                 67.5, 135.0, 90.0, 112.5,
                                 45.0, 157.5, 22.5, 180.0 };

The following will print 1 decimal place:

Serial.print(winddirections[winddir],1);
4

Thanks guys, a Arduino 1.8.5 or Ubuntu 16.04 glitch it seems. After trying everything, I was still getting values for winndir of 9153, 1177, 1306.

Shut everything down and started up again and now I am getting the 2-decimal places I originally thought I should get.