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Re: Incompatible with Wire.h and I2C
Posted by: Charles Bell
Date: December 02, 2013 08:09AM

They are compatible in the sense that they do not conflict for pins and such but combined use too much memory for variables. This shouldn't be a problem on larger Arduino boards, but for Uno, Leonardo, and the like it is.

If you use only static strings you can use PROGMEM to store your strings which will permit enough free memory to use both Wire and the MySQL connector. However, PROGMEM won't help much if you need dynamic strings (or buffers to build strings). The connector and Wire libraries are just too large to be used together on a Uno or lower board.

The options at this point are to use a larger board like a Mega or use a second Arduino to capture your sensors and forward the data to the first Arduino to store it in the database. There are several ways of linking two Arduino - see the serial examples, not the I2C examples. ;)

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