work-in-progress hdc1000 module

modules/hdc1000.py

@@ -0,0 +1,98 @@
+# Library for the temperature and humidity sensor
+#  ----> https://www.adafruit.com/products/2635
+
+from pprint import pprint
+try:
+	import smbus2 as smbus
+except ModuleNotFoundError:
+	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, 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)
+