def __init__(self, i2c):
""" a wrapper class for sensors of a SenseHAT board """
self.i2c = i2c
# init drivers
self.hts = HTS221(i2c, I2C_ADDR_HUMID_TEMP)
self.lps = LPS25(i2c, I2C_ADDR_TEMP_PRESSURE)
self.lsm = LSM9DS1(i2c)
self.matrix = SenseAtmel(i2c ,I2C_ADDR_MATRIX)
