Are these compatible?

marvelousmarvin · March 22, 2015, 6:58pm

I am wondering if the Ultrasonic sensor in the GrovePi kit is compatible with the GoPiGo and that I can use the ultrasonic sensor with the GoPiGo. I am also wondering if I can plug in other sensors in the three prong connector next to Port A1 on the GoPiGo board. Can I use other non-grove sensors and plug it into the connector?

marvelousmarvin · March 22, 2015, 7:00pm

If I can plug in the non-Grove connectors, can I use the same software?

mcauser · March 22, 2015, 8:01pm

It sure is. That’s the beauty of Grove modules. They all share a common 4 pin interface. Some of the sensors are analog, some digital, I2C or even UART (Tx/Rx).

Here is the ultrasonic read:

github.com

DexterInd/GoPiGo/blob/master/Software/Python/gopigo.py#L246


DPR = 360.0/64
# turn x degrees to the right
def turn_right(degrees):
	pulse = int(degrees//DPR)
	enc_tgt(1,0,pulse)
	right()


def turn_right_wait_for_completion(degrees):
	'''
	Same as turn_right() but blocking
	'''
	turn_right(degrees)
	pulse = int(degrees//DPR)
	while enc_read(0) < pulse:
		pass




# turn x degrees to the left
def turn_left(degrees):
	pulse = int(degrees//DPR)
	enc_tgt(0,1,pulse)

Seen here in one of the photos:
http://www.dexterindustries.com/site/?product=gopigo-starter-kit-2

I believe the 3 prong connector is for a servo, so you can pan/tilt something attached to the front. There is a kit available:
http://www.dexterindustries.com/site/?product=servo-package

marvelousmarvin · March 23, 2015, 3:10pm

Thank you! It really helped.