Two shields using same pins

Projects General Guidance
1

I have two shields that both need pins 7,8. What is the most simple way to allow them to both do this?

Can I use jumpers somehow?

2

See the shield datasheet whether it has such jumpers, and how to use them.

3

Where would I find the datasheet, I've searched on Google, but there doesn't seem to be one.

I'm using the Seeed Studio GPRS shield V2 and the Adafruit Ultimate GPS logger.

4

Would a Go-Between shield fix this?

5

N0nny:
Where would I find the datasheet, I've searched on Google, but there doesn't seem to be one.

I'm using the Seeed Studio GPRS shield V2 and the Adafruit Ultimate GPS logger.

www.seeedstudio.com/wiki/GPRS_Shield_V2.0

learn.adafruit.com/downloads/pdf/adafruit-ultimate-gps-logger-shield.pdf

6

On the GPRS shield, you can select D0 and D1, freeing up D7 and D8 for use by the Ultimate GPS logger.

Serial port select
There’re two choices for you to communicate GPRS shield with the main board while plugging the two jumpers on to the SWserial or HWserial positions. If using SWserial, D7 and D8 will be used by SIM900 of GPRS Shield; if using HWserial, D0 (RX) and D1 (TX) will be used.

7

N0nny:
Would a Go-Between shield fix this?

That's what I ordered to fix this issue so I hope so :slight_smile:

8

I'd look for breakout boards instead of the shields, where you have full control of the pin assignments. You'll have to modify the libraries or initialization anyhow, to reflect the moved pins.

9

Using the Go-Between, I'm a little unsure what I pins I would reroute the GPRS to?
I was thinking D5, D6, but they are both PWM, does this affect it in anyway, I'm not sure.

10

People are giving you suggestions, which you ignore completely.
The go-between was your own idea, you bought it without waiting for an answer.
You don't need it, as people here have already told you, you can switch the pins on your gprs shield.

11

Thank you for all your suggestions and help, I apologise if it seemed like I ignored them.

I had tried to do as suggested, but I read through some more pages and the go between was recommended, and I think it may work for what I'm trying to do.