DHT11 Sensor On Beaglebone Black

[drewfustini]

I took readings every 10 seconds:

Code: Select all

status=-1	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-1	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-1	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=-2	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000
status=-1	humidity=0.000000	temperature=0.000000
status=0	humidity=31.000000	temperature=24.000000
status=0	humidity=31.000000	temperature=24.000000

I think this is just a charateristic of the sensor. The -1 and -2 errors are timeout and checksum errors, respectively:

Code: Select all

// Define errors and return values.
#define DHT_ERROR_TIMEOUT -1
#define DHT_ERROR_CHECKSUM -2
#define DHT_ERROR_ARGUMENT -3
#define DHT_ERROR_GPIO -4
#define DHT_SUCCESS 0

[Sujit_Singh]

Thanks again, It did worked very well.