ó Ø-]c@s’ddlZddlmZdZdZdZdZdZeegZdZ d Z d Z e e e gZ d „Z dd „Zd d dd„ZdS(iÿÿÿÿNi(tplatform_detectiiþÿÿÿiýÿÿÿiüÿÿÿi icCsÉtjƒ}|tjkr–tjƒ}|dkrGddlm}|S|dkrgddlm}|S|dkr‡ddlm}|Stdƒ‚n/|tjkr¹ddlm}|Stdƒ‚d S( sDReturn a DHT platform interface for the currently detected platform.i(t Raspberry_Pii(tRaspberry_Pi_2is6No driver for detected Raspberry Pi version available!(tBeaglebone_BlacksUnknown platform.N( Rt RASPBERRY_PIt pi_versiontRRt RuntimeErrortBEAGLEBONE_BLACKR(tplattversionRRR((sB/home/pi/CrowPi/Drivers/Adafruit_Python_DHT/Adafruit_DHT/common.pyt get_platform)s"     cCsC|tkrtdƒ‚n|dkr3tƒ}n|j||ƒS(sþRead DHT sensor of specified sensor type (DHT11, DHT22, or AM2302) on specified pin and return a tuple of humidity (as a floating point value in percent) and temperature (as a floating point value in Celsius). Note that because the sensor requires strict timing to read and Linux is not a real time OS, a result is not guaranteed to be returned! In some cases this will return the tuple (None, None) which indicates the function should be retried. Also note the DHT sensor cannot be read faster than about once every 2 seconds. Platform is an optional parameter which allows you to override the detected platform interface--ignore this parameter unless you receive unknown platform errors and want to override the detection. s.Expected DHT11, DHT22, or AM2302 sensor value.N(tSENSORSt ValueErrortNoneR tread(tsensortpintplatform((sB/home/pi/CrowPi/Drivers/Adafruit_Python_DHT/Adafruit_DHT/common.pyRAs   iicCsbx[t|ƒD]M}t|||ƒ\}}|dk rM|dk rM||fStj|ƒq WdS(s<Read DHT sensor of specified sensor type (DHT11, DHT22, or AM2302) on specified pin and return a tuple of humidity (as a floating point value in percent) and temperature (as a floating point value in Celsius). Unlike the read function, this read_retry function will attempt to read multiple times (up to the specified max retries) until a good reading can be found. If a good reading cannot be found after the amount of retries, a tuple of (None, None) is returned. The delay between retries is by default 2 seconds, but can be overridden. N(NN(trangeRRttimetsleep(RRtretriest delay_secondsRtithumidityt temperature((sB/home/pi/CrowPi/Drivers/Adafruit_Python_DHT/Adafruit_DHT/common.pyt read_retrySs  (RRRt DHT_SUCCESStDHT_ERROR_TIMEOUTtDHT_ERROR_CHECKSUMtDHT_ERROR_ARGUMENTtDHT_ERROR_GPIOtTRANSIENT_ERRORStDHT11tDHT22tAM2302R R RRR(((sB/home/pi/CrowPi/Drivers/Adafruit_Python_DHT/Adafruit_DHT/common.pyts