import json
from RPi import GPIO
def read(environ, response, parameter = None):
status = "200 OK"
header = [
("Content-Type", "application/json"),
("Cache-Control", "no-store, no-cache, must-revalidate"),
("Expires", "0")
]
try:
pin = int(parameter[0])
mode = GPIO.PUD_UP
if len(parameter) > 1 and parameter[1] == "down" :
mode = GPIO.PUD_DOWN
GPIO.setup(pin, GPIO.IN, pull_up_down=mode)
result = GPIO.input(pin)
except Exception as e:
status = "400 Bad Request"
result = str(e)
response(status, header)
return [json.dumps(result).encode()]
