Author Topic: were does the Arduino Sun Harvester Shield gets his SDA and SCL from?  (Read 1046 times)

Bernard

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Hello Gabriel,

when I am looking at the picture of the Arduino Sun Harvester Shield placed on the Arduino Mega board, I don't understand were the RTC module on the Shield gets his SDA and SCL information from. It fits on the UNO, but SDA and SCL on the MEGA are on pin 20 and pin 21 and those pins are not covered by the shield.

So, how did you do that?




Gabriel

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Re: were does the Arduino Sun Harvester Shield gets his SDA and SCL from?
« Reply #1 on: October 08, 2014, 09:07:16 AM »
The Arduino Mega Rev 2560 and Arduino Uno have extra SDA and SDL outputs in the upper left hand corner. The older Arduinos aren't like that, which I'm sure caused a lot of headaches for the people who designed shields for them.

Anyone who has an older Arduino has to manually solder the connections on the shield to make the RTC work.


Bernard

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Re: were does the Arduino Sun Harvester Shield gets his SDA and SCL from?
« Reply #2 on: October 15, 2014, 12:57:53 AM »
Of course. I see them on the new one's.
Thanks!