Wire library without I2C Hangup bug

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lkiss10

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Hello,

I am struggling with I2C bus. The complete program hangs up, if the I2C unit is not available. As I have learnt it is a bug in the Wire library. A new version was just released, but I dont know, how to use it.
https://www.fpaynter.com/tag/i2c-freeze/

There are 2 wire library in my installation:

Arduino\hardware\teensy\avr\libraries\Wire
Arduino\hardware\arduino\avr\libraries\Wire

Probably the 1st is used by the compiler. Can I just replace it with the new library? Or?

Thanks, Laszlo
 
Teensy's version of the Wire library fixed this problem years ago.

If you're using a Teensy, just look at the messages Arduino prints about which library it's using. If you're using the copy in {Arduino}\hardware\teensy\avr\libraries\Wire then you have this fix and a lot of other improvements which still aren't part of Arduino's library.
 
Hello Paul,

Thanks for the quick reply. I have checked, and it uses the wire library from teensy library. So I dont know, what can be the issue. I use this library: https://github.com/jarzebski/Arduino-INA226 for some current sensors. I have 3 Teensy 4.0 with some INA226 boards, and they work well. However now I have made something wrong with the 4th Teensy and the connected INA boards, so if I call the current read function the complete program stops. If I comment out this line, the rest of the program works well. I will check the hardware, but independently from the hardware issue, the program should not stop, if the Teensy cannot reach the I2C board.

Laszlo
 
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