pi@VkS-SwPi ~/swpi $ gpio -v
gpio version: 2.38
Copyright (c) 2012-2017 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty

Raspberry Pi Details:
  Type: Model B, Revision: 02, Memory: 512MB, Maker: Sony
  * Device tree is enabled.
  *--> Raspberry Pi Model B Rev 2
  * This Raspberry Pi supports user-level GPIO access.
pi@VkS-SwPi ~/swpi $ cd DHT
pi@VkS-SwPi ~/swpi/DHT $ sudo nano swpi.cfg
pi@VkS-SwPi ~/swpi/DHT $ sudo python test.py
Traceback (most recent call last):
  File "test.py", line 33, in <module>
    output = subprocess.check_output(["./DHT"]);
  File "/usr/lib/python2.7/subprocess.py", line 544, in check_output
    raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '['./DHT']' returned non-zero exit status                                                       1
pi@VkS-SwPi ~/swpi/DHT $ gpio readall

pi@VkS-SwPi ~/swpi/DHT $ make clean
rm *.o DHT
pi@VkS-SwPi ~/swpi/DHT $ make
gcc -c -Wall DHT.c -std=gnu99
DHT.c: In function ‘dht11_read_val’:
DHT.c:19:9: warning: unused variable ‘farenheit’ [-Wunused-variable]
DHT.c: In function ‘main’:
DHT.c:112:4: warning: unknown conversion type character 0xa in format [-Wformat]
gcc -o DHT  DHT.o -lrt -L/usr/local/lib -lwiringPi
gcc -c libDHT.c  -std=gnu99
gcc --shared -o libDHT.so libDHT.o  -lrt -L/usr/local/lib -lwiringPi
gcc -c -Wall DHT_rf.c -std=gnu99 -I. -lbcm2835
DHT_rf.c: In function ‘readDHT’:
DHT_rf.c:145:2: warning: unknown conversion type character 0xa in format [-Wformat]
DHT_rf.c:154:2: warning: unknown conversion type character 0xa in format [-Wformat]
gcc -o DHT_rf DHT_rf.o -std=gnu99 -I. -lbcm2835

pi@swpi ~ $ cd /swpi/DHT
pi@swpi /swpi/DHT $ ls
DHT  DHT.c  DHT_rf  DHT_rf.c  libDHT.c  Makefile  test.py
pi@swpi /swpi/DHT $ sudo python test.py
Temperature: 14.0 C Humidity:    36.0 
Temperature: 14.0 C Humidity:    30.0 
Temperature: 14.0 C Humidity:    30.0 
Temperature: 14.0 C Humidity:    33.0 
Temperature: 14.0 C Humidity:    32.0 
Temperature: 14.0 C Humidity:    31.0 
Temperature: 14.0 C Humidity:    36.0 
^CTraceback (most recent call last):
  File "test.py", line 52, in <module>
    time.sleep(1)
KeyboardInterrupt
pi@swpi /swpi/DHT $

pi@swpi /swpi/DHT $ sudo python test.py
Traceback (most recent call last):
  File "test.py", line 33, in <module>
    output = subprocess.check_output(["./DHT"]);
  File "/usr/lib/python2.7/subprocess.py", line 544, in check_output
    raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '['./DHT']' returned non-zero exit status 1
pi@swpi /swpi/DHT $