01dd7804b8
This is to keep the top-level directory clean, to make it clear what is core and what is a port, and to allow the repository to grow with new ports in a sustainable way.
33 lines
794 B
Python
33 lines
794 B
Python
# DHT11/DHT22 driver for MicroPython on ESP8266
|
|
# MIT license; Copyright (c) 2016 Damien P. George
|
|
|
|
import esp
|
|
|
|
class DHTBase:
|
|
def __init__(self, pin):
|
|
self.pin = pin
|
|
self.buf = bytearray(5)
|
|
|
|
def measure(self):
|
|
buf = self.buf
|
|
esp.dht_readinto(self.pin, buf)
|
|
if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xff != buf[4]:
|
|
raise Exception("checksum error")
|
|
|
|
class DHT11(DHTBase):
|
|
def humidity(self):
|
|
return self.buf[0]
|
|
|
|
def temperature(self):
|
|
return self.buf[2]
|
|
|
|
class DHT22(DHTBase):
|
|
def humidity(self):
|
|
return (self.buf[0] << 8 | self.buf[1]) * 0.1
|
|
|
|
def temperature(self):
|
|
t = ((self.buf[2] & 0x7f) << 8 | self.buf[3]) * 0.1
|
|
if self.buf[2] & 0x80:
|
|
t = -t
|
|
return t
|