I2C with Arduino Due can't get it to work So I have a simple program that I run on an Arduino pro mini and I get nice answer from the IR temperature sensor and can print this to serial port. And if I look with my scope/logic analyzer I see this. [attachment 76608 NewFile2.jpg] but when I compile and upload it for the due I get this ( no temperature only FF ) [attachment 76609 NewFile1.jpg] I already decreased the speed to 50kHz and 20 kHz, started at 100kHz. The only difference I see is that with the pro mini you see a small delay between writes and reads. I am already 2 days busy with this and I have no clue, and don't know what to do next ? https://reprap.org/forum/read.php?2,653417,653417#msg-653417 Thu, 16 Apr 2026 13:48:06 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?2,653417,691951#msg-691951 Re: I2C with Arduino Due can't get it to work https://reprap.org/forum/read.php?2,653417,691951#msg-691951
what is it wrong?
I2C Scanner
Scanning...
I2C device found at address 0x50 !
I2C device found at address 0x51 !
I2C device found at address 0x52 !
I2C device found at address 0x53 !
I2C device found at address 0x54 !
I2C device found at address 0x55 !
I2C device found at address 0x56 !
I2C device found at address 0x57 !
done


If I remove EEPROM it says found nothing]]> ZhenyaKa Developers Wed, 27 Jul 2016 02:35:25 -0400 https://reprap.org/forum/read.php?2,653417,653855#msg-653855 Re: I2C with Arduino Due can't get it to work https://reprap.org/forum/read.php?2,653417,653855#msg-653855
And changing the firmware code a little bit and it works now.
So now I have to integrate it in repetier, I am going to use the Wire library although Repetier has made there own versions.]]> amigob Developers Mon, 18 Apr 2016 16:06:45 -0400 https://reprap.org/forum/read.php?2,653417,653431#msg-653431 Re: I2C with Arduino Due can't get it to work https://reprap.org/forum/read.php?2,653417,653431#msg-653431 www.adafruit.com]
code is from also from adafruit [learn.adafruit.com]
arduino 1.58
Due Clone brand I don't know, but I know that I2C works with the eeprom on my RADDS.

I can't add the delay in between the writes and reads, the clock is not controlled on application level.]]> amigob Developers Sun, 17 Apr 2016 16:24:41 -0400 https://reprap.org/forum/read.php?2,653417,653424#msg-653424 Re: I2C with Arduino Due can't get it to work https://reprap.org/forum/read.php?2,653417,653424#msg-653424
But you need to post more details, to the level at which someone else could reproduce your problem. i.e.

what is the sensor
what is the circuit (schematic)
what is the version of Arduino IDE
what make of Due
What is the smallest sketch to show the problem]]> bobc Developers Sun, 17 Apr 2016 16:13:43 -0400 https://reprap.org/forum/read.php?2,653417,653417#msg-653417 I2C with Arduino Due can't get it to work https://reprap.org/forum/read.php?2,653417,653417#msg-653417 and can print this to serial port.

And if I look with my scope/logic analyzer I see this.
[attachment 76608 NewFile2.jpg]

but when I compile and upload it for the due I get this ( no temperature only FF )
[attachment 76609 NewFile1.jpg]
I already decreased the speed to 50kHz and 20 kHz, started at 100kHz.
The only difference I see is that with the pro mini you see a small delay between writes and reads.

I am already 2 days busy with this and I have no clue, and don't know what to do next ?]]> amigob Developers Sun, 17 Apr 2016 15:47:30 -0400