When I got my new bbgw I ran an internet search to find how to use the
relay and did not find an easy answer, so here goes:
1. The Grove - SPDT Relay(30A) - uses +5V , so you need to solder the third
pin of that groove connector. Disconnect it from the board, and connect it
to the input 5v power.
The groove connector pinout are:
J4
1- I2C2_SCL - P9_19
2- I2C2_SDA - P9_20
3- VDD 3.3
4- GND
J5
1- UART2_RXD - P9_22
2- UART2_TXD - P9_21
3- VDD 3.3
4- GND
The pinout of the relay is:
1- Signal
2- not connected
3- +5V
4- GND
If you connect the relay to J4 use this python code, to toggle it on and off
import Adafruit_BBIO.GPIO as GPIO
import time
GPIO.setup("P9_19", GPIO.OUT)
while True:
GPIO.output("P9_19", GPIO.HIGH)
time.sleep(0.5)
GPIO.output("P9_19", GPIO.LOW)
time.sleep(0.5)
--
For more options, visit http://beagleboard.org/discuss
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