Serial.print('Unknow error at address 0x') Serial.print('I2C device found at address 0x') a device did acknowledge to the address.

The i2c_scanner uses the return value of Being that this is a university desktop, there is a lot of other software installed, and I'm wondering if something installed (like a C or C++ IDE) could be messing with the arduino IDE compiler settings and causing this problem (at this point I'm guessing because the problem is well beyond my ability to understand and fix).Īny thoughts or known IDE conflicts would be greatly appreciated.įor(address = 1 address < 127 address++ ) I have un-installed and re-installed the arduino IDE (and its associated program files) several times (where the Wire library lives), with no improvement.

Since this code bypasses the adafruit sensor libraries and just goes directly to Wire communication, I can only conclude that the problem must lie with the implementation of the Wire library. An i2c scanner (code include below) loaded onto a Mega from my desktop returns no i2c devices connected. This problem is also independent of breakout (I have at least 5 of each breakout) and Mega (I have 8 Megas). There are no warnings from the compiler (even in verbose mode), and appears to be restricted to my desktop, as my labmate can load the same code onto the same Mega using the same breakout and wiring (I'll literally give him the breadboard as-is), and the code runs as intended. begin() in the setup section of the sketch. I have tracked the problem to receiving a returned value of 'false' from the respective. Recently, all of my sketches loaded from my desktop show a recurring error on i2c sensors.

I have been working on a project with several i2c breakouts from Adafruit, used on multiple arduino Mega 2560's (old and new).

Arduino wire library warning