* add a small sleep before reading the sensor
The read of the sensor might be incorrect if it's read too soon after the setup_input call. It might be isolated to my case where I rely on the the PI internal PULL, but once I added this sleep I never get false initial read. If you think this change is appropriate please merge it.
* Update rpi_gpio.py
* Update rpi_gpio.py
* Update rpi_gpio.py