Piglow led add on board raspberry pi pimoroni piglow p this piglow led add on board from pimoroni is a small add on board for the raspberry pi which provides 18 individually controllable leds and can be used for a host of things such as showing current system loads or notifying you of tweets or incoming e mail p p equipped with a sn3218 8 bit 18 channel pwm chip to drive 18 surface mount leds while communication is done via i2c over the gpio header with a bus address of 0x54 python ex