# Turns on each pin of an mcp23017 on address 0x20 ( quick2wire IO expander ) import wiringpi2 pin_base = 65 i2c_addr = 0x20 pins = [65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80] wiringpi2.wiringPiSetup() wiringpi2.mcp23017Setup(pin_base,i2c_addr) for pin in pins: wiringpi2.pinMode(pin,1) wiringpi2.digitalWrite(pin,1) # wiringpi2.delay(1000) # wiringpi2.digitalWrite(pin,0)