99 lines
1.8 KiB
Python
99 lines
1.8 KiB
Python
# Library for the temperature and humidity sensor
|
|
# ----> https://www.adafruit.com/products/2635
|
|
|
|
from pprint import pprint
|
|
try:
|
|
import smbus2 as smbus
|
|
except ImportError:
|
|
import smbus
|
|
|
|
I2CADDR = 0x40
|
|
|
|
TEMP_REG = 0x00
|
|
HUMID_REG = 0x01
|
|
CONFIG_REG = 0x02
|
|
|
|
CONFIG_RST = (1 << 15)
|
|
CONFIG_HEAT = (1 << 13)
|
|
CONFIG_MODE_SINGLE = 0
|
|
CONFIG_MODE_BOTH = (1 << 12)
|
|
CONFIG_BATT = (1 << 11)
|
|
CONFIG_TRES_14 = 0
|
|
CONFIG_TRES_11 = (1 << 10)
|
|
CONFIG_HRES_14 = 0
|
|
CONFIG_HRES_11 = (1 << 8)
|
|
CONFIG_HRES_8 = (1 << 9)
|
|
|
|
SERIAL1 = 0xFB
|
|
SERIAL2 = 0xFC
|
|
SERIAL3 = 0xFD
|
|
MANUFID = 0xFE
|
|
DEVICEID = 0xFF
|
|
|
|
try:
|
|
bus = smbus.SMBus(1)
|
|
except:
|
|
print("No I2C bus found.")
|
|
|
|
def reset():
|
|
config = (
|
|
CONFIG_RST |
|
|
CONFIG_MODE_BOTH |
|
|
CONFIG_TRES_14 |
|
|
CONFIG_HRES_14
|
|
)
|
|
bus.write_word_data(I2CADDR, CONFIG_REG, config)
|
|
|
|
def triggerMeasurements():
|
|
bus.write_byte(I2CADDR, TEMP_REG)
|
|
|
|
def readTemperature():
|
|
vals = bus.read_i2c_block_data(I2CADDR, TEMP_REG)
|
|
pprint(vals)
|
|
#float temp = (read32(HDC1000_TEMP, 20) >> 16);
|
|
#temp /= 65536;
|
|
#temp *= 165;
|
|
#temp -= 40;
|
|
|
|
#return temp;
|
|
|
|
def readHumidity():
|
|
vals = bus.read_i2c_block_data(I2CADDR, HUMID_REG)
|
|
pprint(vals)
|
|
#float hum = (read32(HDC1000_TEMP, 20) & 0xFFFF);
|
|
#hum /= 65536;
|
|
#hum *= 100;
|
|
|
|
#return hum;
|
|
|
|
def drySensor():
|
|
origconfig = bus.read_word_data(I2CADDR, CONFIG_REG)
|
|
newconfig = (
|
|
CONFIG_RST |
|
|
CONFIG_HEAT |
|
|
CONFIG_MODE_BOTH |
|
|
CONFIG_TRES_14 |
|
|
CONFIG_HRES_14
|
|
)
|
|
|
|
bus.write_word_data(I2CADDR, CONFIG_REG, newconfig)
|
|
|
|
sleep(0.1)
|
|
|
|
# Take 1000 readings
|
|
for x in range(0, 1000):
|
|
triggerMeasurements()
|
|
sleep(0.1)
|
|
|
|
sleep(0.1)
|
|
|
|
origconfig |= CONFIG_RST;
|
|
bus.write_word_data(I2CADDR, CONFIG_REG, origconfig)
|
|
|
|
def init():
|
|
reset()
|
|
manuf = bus.read_word_data(I2CADDR, MANUFID)
|
|
dev = bus.read_word_data(I2CADDR, DEVICEID)
|
|
print("Manufacturer:", manuf, "Device:", dev)
|
|
|