Damien George
7 years ago
3 changed files with 34 additions and 33 deletions
@ -0,0 +1,32 @@ |
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# DHT11/DHT22 driver for MicroPython on ESP8266 |
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# MIT license; Copyright (c) 2016 Damien P. George |
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import esp |
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class DHTBase: |
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def __init__(self, pin): |
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self.pin = pin |
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self.buf = bytearray(5) |
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def measure(self): |
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buf = self.buf |
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esp.dht_readinto(self.pin, buf) |
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if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xff != buf[4]: |
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raise Exception("checksum error") |
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class DHT11(DHTBase): |
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def humidity(self): |
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return self.buf[0] |
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def temperature(self): |
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return self.buf[2] |
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class DHT22(DHTBase): |
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def humidity(self): |
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return (self.buf[0] << 8 | self.buf[1]) * 0.1 |
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def temperature(self): |
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t = ((self.buf[2] & 0x7f) << 8 | self.buf[3]) * 0.1 |
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if self.buf[2] & 0x80: |
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t = -t |
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return t |
@ -1 +1 @@ |
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../../esp8266/modules/dht.py |
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../../../drivers/dht/dht.py |
@ -1,32 +0,0 @@ |
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# DHT11/DHT22 driver for MicroPython on ESP8266 |
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# MIT license; Copyright (c) 2016 Damien P. George |
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|
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import esp |
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|
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class DHTBase: |
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def __init__(self, pin): |
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self.pin = pin |
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self.buf = bytearray(5) |
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|
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def measure(self): |
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buf = self.buf |
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esp.dht_readinto(self.pin, buf) |
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if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xff != buf[4]: |
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raise Exception("checksum error") |
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|
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class DHT11(DHTBase): |
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def humidity(self): |
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return self.buf[0] |
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|
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def temperature(self): |
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return self.buf[2] |
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|
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class DHT22(DHTBase): |
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def humidity(self): |
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return (self.buf[0] << 8 | self.buf[1]) * 0.1 |
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|
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def temperature(self): |
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t = ((self.buf[2] & 0x7f) << 8 | self.buf[3]) * 0.1 |
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if self.buf[2] & 0x80: |
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t = -t |
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return t |
@ -0,0 +1 @@ |
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../../../drivers/dht/dht.py |
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