diff options
Diffstat (limited to 'drivers/dht/dht.py')
| -rw-r--r-- | drivers/dht/dht.py | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/dht/dht.py b/drivers/dht/dht.py index eed61df7c..1163b382b 100644 --- a/drivers/dht/dht.py +++ b/drivers/dht/dht.py @@ -6,6 +6,7 @@ try: except: from pyb import dht_readinto + class DHTBase: def __init__(self, pin): self.pin = pin @@ -14,9 +15,10 @@ class DHTBase: def measure(self): buf = self.buf dht_readinto(self.pin, buf) - if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xff != buf[4]: + 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] @@ -24,12 +26,13 @@ class DHT11(DHTBase): 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 + t = ((self.buf[2] & 0x7F) << 8 | self.buf[3]) * 0.1 if self.buf[2] & 0x80: t = -t return t |