Hi, I received my cores a couple of days ago and started tinkering around with it. Now I wanted to port some of my Arduino Uno Apps to SparkCore. This App uses 2 Sensors via I2C protocol (Wire) which should be supported by the Cores. After flashing the Code to a core it freezes with a call of the W…

Hello @Taron Could you post your code here so that we could be in a better position to help? Thanks!

I quickly wrote together a minimal example: void setup() { Serial.begin(9600); Wire.begin(); delay(10000); //10sec delay to be able to connect serial pinMode(7, OUTPUT); digitalWrite(7, HIGH); // just light the blue led to indicate loop is starting Serial.println(">>>>>>>…

@Taron I’m able to replicate this bug on my side as well. @satishgn and I are looking into it right now. Will post as soon as we are able to resolve this. Thanks!

We have found out the cause of this issue. Should be resolved within a couple of days.

This explains all the problems I’ve been having. I was blaming my code flashing issues on the cloud, but it looks like this must have been the cause. I’m currently working on interfacing a wii nunchuck to the core and it uses wire extensively. Factory resetting is the only way I can re-flash. @sati…

Hi @aylr , It’s possible that the 10 second delay in your setup function is causing your core to time out with respect to the cloud. Right now the core checks its connection every 15 seconds, and it’s possible it thinks it went offline. We’re working on a fix for this bug, but it’s possible reduci…

I was working on interfacing SparkCore via I2C to an LCD module. Was going nuts trying to get old code that had worked on other chips to fly with Spark. Finally found that I needed to shift the address left one bit when using the Write library in the cloud vs. other Arduino stuff. This link says …

Of course, the Read/Write bit needs to be proper in the LSB position, as well. But I was only writing, so zero there worked just fine.

Is this fixed yet? Or how do you get this working exactly? I have the same problems at the moment.

Problems with Wire (I2C) [Solved]

Firmware

BDub April 4, 2014, 5:52pm 13

Please reference this post that announced the fix for a little background on the issue:

Topic		Replies	Views
Problem with Wire.h - rebooting core Troubleshooting	5	2013	February 20, 2014
I2C on Spark core (noob question) Getting Started	30	13781	November 5, 2015
I2C wire methods crashing Spark Core Troubleshooting	12	1730	May 18, 2016
Important: 7-Bit I2C Addresses are Now Working! (01/24/2014) Firmware	7	5693	February 4, 2014
i2c on core suddenly stopped working? Troubleshooting	5	2224	September 13, 2015

Problems with Wire (I2C) [Solved]

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