Python example for SI7021 board from ControlEverything

controlEverything-SI7021.py

#!/usr/bin/python

import sys
from time import sleep, strftime
from OmegaExpansion import onionI2C # requires fixes for https://github.com/OnionIoT/i2c-exp-driver/issues/13

while True:
    i2c     = onionI2C.OnionI2C()
    i2c.write(0x40, [0xE5])
    sleep(0.1)
    h0, h1 = i2c.read(0x40, 2)

    i2c.write(0x40, [0xE0])
    sleep(0.1)
    t0, t1 = i2c.read(0x40, 2)

    hum = ((125.0 * (h0 * 256 + h1)) / 65536.0) - 6.0
    temp = ((175.72 * (t0 * 256 + t1)) / 65536.0) - 46.85;

    
    print '%s | RH: %0.1f %% | Temp %0.1f C' % (
        strftime('%X'),
        hum,
        temp
    )

    sleep(5)
    sys.stdout.write("\033[F")
    sys.stdout.write("\033[K")