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Software/Python/grove_i2c_adc/grove_i2c_adc.py

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+#!/usr/bin/env python
+#
+# GrovePi Library for using the Grove - I2C ADC(http://www.seeedstudio.com/depot/Grove-I2C-ADC-p-1580.html)
+#
+# The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
+#
+# Have a question about this library?  Ask on the forums here:  http://forum.dexterindustries.com/c/grovepi
+#
+
+# Released under the MIT license (http://choosealicense.com/licenses/mit/).
+# For more information see https://github.com/DexterInd/GrovePi/blob/master/LICENSE
+
+import time,sys
+import RPi.GPIO as GPIO
+import smbus
+
+# use the bus that matches your raspi version
+rev = GPIO.RPI_REVISION
+if rev == 2 or rev == 3:
+    bus = smbus.SMBus(1)
+else:
+    bus = smbus.SMBus(0)
+
+class ADC:
+	address = None
+
+	REG_ADDR_RESULT = 0x00
+	REG_ADDR_ALERT  = 0x01
+	REG_ADDR_CONFIG = 0x02
+	REG_ADDR_LIMITL = 0x03
+	REG_ADDR_LIMITH = 0x04
+	REG_ADDR_HYST   = 0x05
+	REG_ADDR_CONVL  = 0x06
+	REG_ADDR_CONVH  = 0x07
+
+	def __init__(self,address=0x55):
+		self.address=address
+		bus.write_byte_data(self.address, self.REG_ADDR_CONFIG,0x20)
+
+	def adc_read(self):
+		data=bus.read_i2c_block_data(self.address, self.REG_ADDR_RESULT, 2)
+		raw_val=(data[0]&0x0f)<<8 | data[1]
+		return raw_val
+
+if __name__ == "__main__":
+	adc= ADC()
+	while True:
+		print(adc.adc_read())
+		time.sleep(.5)