Currently , I am having a http://arduino.cc/en/Main/ArduinoGSMShieldArduino GSM shield, I have planned to purchase https://www.adafruit.com/products/1272GPS shield. Here, In the GPS module uses Pin 7 & 8 for Rx and Tx. But the GSM shield uses Pin 7 for Modem Reset. Now the Pin 7 overlaps.
Will it affect in anyway ? What consequences I need to face by mounting to a common pin? Is there any option for these types issue ? How it can be solved ?
Shields overlaps on a common Pin
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- adafruit_support_mike
- Posts: 67446
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Shields overlaps on a common Pin
The GPS library uses pins 7 and 8 as a software serial connection, so you can reassign it to other pins if you need to.
The shield's connections to those pins are hardwired, but there are secondary TX/RX holes on the shield that you can use to reassign the signals. Just cut the traces to the TX/RX holes near the "Soft serial / direct" switch and connect jumpers to the holes for whatever pins you decide to use.
The shield's connections to those pins are hardwired, but there are secondary TX/RX holes on the shield that you can use to reassign the signals. Just cut the traces to the TX/RX holes near the "Soft serial / direct" switch and connect jumpers to the holes for whatever pins you decide to use.
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Re: Shields overlaps on a common Pin
I have brought the Ultimate GPS Logger shield and mounted on Arduino UNO and Arduino GSM Shield as said on the above post. You said, We need cut the trace.
Pin 7 : GSM shield: as modem reset
Pin 7 : GPS shield: Rx
But it is still working with the same pin 7. will there be any problem with this or definitely I need to cut the trace ?
Pin 7 : GSM shield: as modem reset
Pin 7 : GPS shield: Rx
But it is still working with the same pin 7. will there be any problem with this or definitely I need to cut the trace ?
- adafruit_support_mike
- Posts: 67446
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Shields overlaps on a common Pin
If the shields work the way you want them to without cutting the trance, go ahead and use them as they are.
If you have problems because of a pin conflict, you can cut the trace to pin 7 and move that signal to another pin.
If you have problems because of a pin conflict, you can cut the trace to pin 7 and move that signal to another pin.
Please be positive and constructive with your questions and comments.