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I see the documentation is not clear: I'll update the reg map, hook up guide, and examples so that it's more obvious that the user must clear the interrupts. The Twist firmware could use improvement so if you've got suggestions I'...

tldr; Twist is working as expected, though my design is a bit lacking. Use clearInterrupts() to get rid of your INT toggling. More detail: When master queries the Twist, inside the I2C ISR the INT pin *is* released to high impedance (

Hmm, I'm getting suspicious of the sleep_mode(); call in the main loop ( We originally tried to put the ATtiny84 to sleep to save ~1mA but I'm guessing when the ATtiny goes to sleep it may be releasing the...

Sorry for the delay - I wasn't aware of your posts until this morning. Because of all the ways customers can contact us (chat, email, twitter, forum, github, product comments, product reviews) this one slipped through the cracks. This is best addressed via an issue creation on github, but I don't me...

Re: Restrictions on SparkFun Open Source Hardware Components

 by sparky ¦  Thu Aug 06, 2015 9:33 am ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Restrictions on SparkFun Open Source Hardware Components? ¦  Replies: 5 ¦  Views: 2884

Hi Don - Great question that requires some thought into the definition of open source hardware. From my perspective as long as your intentions are to keep the OpenLog part of the mainboard open, and to share that part of the project with others than you should have no problems building a mainboard a...

Re: Posting data to SparkFun server

 by sparky ¦  Wed Apr 30, 2014 8:25 am ¦  Forum: ¦  Topic: Posting data to SparkFun server ¦  Replies: 13 ¦  Views: 8088

For a larger data set example, checkout the Wimp Weather Station tutorial and the feed it reports to . Here's the (relatively) simple code that pushes the data to the channel: //Now we form the large string to pass to sparkfun local strSparkFun = ""; local publicKey = ...

Posting data to SparkFun server

 by sparky ¦  Wed Apr 30, 2014 8:18 am ¦  Forum: ¦  Topic: Posting data to SparkFun server ¦  Replies: 13 ¦  Views: 8088

Hi all, I wanted to give the forum readers a heads up about a data channel service that we've been working on. Check it out here: . I was thrilled by how easy Wunderground was to work with and then let down by the complexities of using other services. So we created Phant (as...

Re: Eagle layer color selection

 by sparky ¦  Fri Dec 09, 2011 2:15 pm ¦  Forum: PCB Design Questions ¦  Topic: Eagle layer color selection ¦  Replies: 4 ¦  Views: 4758

Version 5.11 on windows 7 seems to lock the palette now. A command will fix spot 16 to white:

set palette 16 0x00000000;

Re: OpenLog firmware update

 by sparky ¦  Wed Aug 04, 2010 7:37 am ¦  Forum: SparkFun Product Questions ¦  Topic: OpenLog firmware update ¦  Replies: 5 ¦  Views: 683

I must see this picture of an OpenLog on a tank. Or, maybe not.... New v2 firmware is released for the OpenLog. It's still under a bit to test hammering, but it handles 8GB FAT32 SDHC cards swimmingly (I've always wanted to use that word in a sentence). Please give it a whirl:

Re: OpenLog large data handling

 by sparky ¦  Wed Aug 04, 2010 7:31 am ¦  Forum: New Product Ideas ¦  Topic: OpenLog large data handling ¦  Replies: 2 ¦  Views: 675

Hi Jack - thanks for the kind words! I'm always happy to work on OpenLog. I'm trying to wrap my head around what your code does. It reads from a file, and prints it to the terminal, yes? How is this different from the current read command? We have start/stop arguments on the read command so you coul...

Re: arduino + microSD sniffer

 by sparky ¦  Wed Aug 04, 2010 7:25 am ¦  Forum: SparkFun Product Questions ¦  Topic: arduino + microSD sniffer ¦  Replies: 1 ¦  Views: 391

Hmm - I don't know of a good way to get at the data stored within OpenLog other than through the serial interface. You may want to use a Arduino Pro with and FTDI Basic (has a miniUSB connector on it). Another option may be to use the Logomatic. It has USB and datalogging built onto it. Cheers, -Nat...

Re: OpenLog VReg error?

 by sparky ¦  Fri Jun 18, 2010 7:27 am ¦  Forum: SparkFun Product Questions ¦  Topic: OpenLog VReg error? ¦  Replies: 2 ¦  Views: 477

Good eyes, but we use the MIC5205 : Cbyp is used only for low-noise operation. The MIC5205 is already very low noise. The extra bypass decoupling would be needed if we were doing sensitive ADC readings, etc.


Re: Communication Errors between Arduino and OpenLog

 by sparky ¦  Thu May 13, 2010 3:54 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Communication Errors between Arduino and OpenLog ¦  Replies: 9 ¦  Views: 2994

Hrmm - sounds like a buffer/timing problem. You can't really read in serial via software and then output it via hardware. You're bound to lose some characters. I'll try to do some testing next week to make sure it's not an OpenLog problem, but my guess is that you are missing software serial charact...

Re: Ipod and other sockets legality

 by sparky ¦  Fri Apr 30, 2010 7:16 am ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Ipod and other sockets legality ¦  Replies: 9 ¦  Views: 1928

If I remember correctly, the 'iPod connector' was not really iPod at all, it was JST or something. Apple needed a connector for this new music player thing, checked the market and found a high density connector on the market, got good pricing, and went crazy. They can't get mad at you for using a 3r...

Re: Read Write files using Openlog + Arduino

 by sparky ¦  Wed Apr 28, 2010 10:15 am ¦  Forum: SparkFun Product Questions ¦  Topic: Read Write files using Openlog + Arduino ¦  Replies: 3 ¦  Views: 2652

I think I found some of your problems. 1) Because you never know what state OpenLog is in (is it in file mode or already at the command prompt?), you may need to press enter after sending ctrl+z to clear out some erroneous ctrl+zs. For example, if you load a new sketch onto an OpenLog that is alread...

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