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Topic: I2C Issues (Read 7410 times) previous topic - next topic


On using the I2C scanner it says no device found for the LilyPad, I even swapped the LilyPad with a friend and it still has the same output

The Uno is detected immediately at the correct address


Apr 24, 2013, 09:37 am Last Edit: Apr 24, 2013, 09:39 am by Erdin Reason: 1
The pins for I2C of the microcontroller on the Lilypad board could be blown. Or you use the wrong pins.

Can you upload a photo of the Lilypad with the wires ?
Can you get another Lilypad ?

If you have a I2C sensor and working code, you could try that with the Lilypad to see if the Lilypad is able to do I2C.
Or you could run the i2c scanner on the Lilypad, and try to see (with an osccilloscope) if the I2C bus has activity.
I used the line-in of a pc (with an audio-attenuator) to record the I2C activity, see the attachment, http://arduino.cc/forum/index.php/topic,159855.msg1197347.html#msg1197347
The gap at 1/3 is a device ACK to its address.



I changed the breadboard and alligator clips and everything works now!

Thanks a lot for all the help!!


I'm glad to hear it is working !

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