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relayDriver

Raspberry Pi python driver for relay board

This module provides routines for driving a relay module through a Raspberry Pi. For testing a Sainsmart 4-Channel 5V Relay Module was used. This module uses the RPi.GPIO module to drive the GPIO pins.

Module setup/teardown modules

  1. Init/Shutdown Module

  • initRelayBoard() Set up the GPIO library and set the GPIO pins for the relay board

  • shutdownRelayBoard() Shutdown the GPIO complex

  1. Query operations

  • getRelayState(channel) return state of the relay. Possible values are relay_open and relay_closed.

  • isRelayOpen(channel) return true if relay is open, false if relay is closed

  • isRelayClosed(channel) return true if relay is closed, false if relay is open

  1. Update operations

  • Open Relay openRelay(channel) Set the relay at channel to an open state. If already open, this will do nothing.

  • Close Relay closeRelay(channel) Set the relay at channel to an closed state. If already closed, this will do nothing.

  • Pulse Relay pulseRelay(channel)