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Messages - cromas

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1
iOS / Anyone tried writing an RFduino app with Xamarin?
« on: May 21, 2016, 12:08:45 PM »
Wondering how difficult it is to communicate with RFduino over just CoreBluetooth especially when coming from C#.

2
iOS / Re: RFduino iOS Color Wheel App
« on: October 20, 2015, 11:24:46 AM »
This crashes on iOS 9. Can we get an update?

3
Android / Re: Looking for someone to convert IOS app to Android
« on: February 27, 2015, 09:59:18 AM »
FYI, there is no "converting" between an iOS and Android app, unless it was written on some kind of mobile-app abstraction layer originally. iOS uses a completely different set of languages, libraries, and tooling than Android (obj-c, cocoa, xcode vs. java-world). This means that your app will need to be necessarily re-written for Android, not just converted.

If this is a paid job and you would like to share the details, I may be interested in taking a crack at it.

4
Getting Started / Re: Using I2C
« on: February 24, 2015, 08:00:30 AM »
Is it possible to choose different pins to use for I2C, or is this a baked-in part of the hardware?

5
Support / Re: Necessary to connect ground pads?
« on: February 21, 2015, 05:22:48 PM »
This is greatly informative. Thank you very much. I'm new to PCB design and SMD components in particular; I appreciate the help!

6
I will definitely send it if I can find it, but it's only a vague recollection. I'm sure you know there are more than a few poorly-translated "data sheets" for these, each claiming different timing specs. I could be mis-remembering some other forum post about them being blue on power-on, but I feel like I did see it at least described in one of those sheets. Maybe not "design" but at least "expected". But I hear you on the power-up concerns.

You might try contacting Daniel Garcia of FastLED fame. He knows these better than just about anyone I've spoken with. He might know.

7
tolson yes the blue-on-power is in the spec, somewhere. "By design."

The wordpress link I posted before explains much of how the protocol actually works. The LEDs have a 400 or 800 Khz internal oscillator. The weird protocol essentially comes down to latching bits after some multiple of cycles.

8
Support / Necessary to connect ground pads?
« on: February 21, 2015, 01:18:52 AM »
I'm designing a PCB which will use the RFD22301 SMD component. Is it necessary to connect all the ground pads together as shown below, or are they already "internally" connected on the RFD22301 PCB?


9
Support / Re: Eagle library for RFD22301?
« on: February 14, 2015, 03:18:10 PM »
Acrobotic supplies an EAGLE library containing the RFD22301:
https://github.com/acrobotic/Ai_EAGLE_Libraries/blob/master/Ai_RF.lbr

EDIT apparently RFD supplies this now:
http://www.rfdigital.com/wp-content/libraries/22301_lib.zip

10
Acrobotic supplies an EAGLE library containing the RFD22301:
https://github.com/acrobotic/Ai_EAGLE_Libraries/blob/master/Ai_RF.lbr

EDIT apparently RFD supplies this now:
http://www.rfdigital.com/wp-content/libraries/22301_lib.zip

11
Software / Re: Fast I2C 400 K Hz
« on: February 13, 2015, 04:38:53 PM »
Excellent, thanks.

12
Software / Re: Fast I2C 400 K Hz
« on: February 13, 2015, 10:31:15 AM »
Why's that? RFD wrote the Wire library, did they not?

13
Software / Re: I2C speeds
« on: February 11, 2015, 06:16:29 PM »
Thanks for the reply, missed this before. For anyone else who sees this question in the future, please reference this thread for choosing other speeds:

http://forum.rfduino.com/index.php?topic=371.0

14
Software / Re: Fast I2C 400 K Hz
« on: February 11, 2015, 06:15:05 PM »
Is there any possibility (hardware + software) for supporting Fm+ bus, i.e. 1MHz, in the future?

15
BLE and Low Level Development / Does RFduino support the Scheduler?
« on: February 10, 2015, 11:00:43 PM »
http://arduino.cc/en/Reference/Scheduler

I'm guessing no but thought it would be good to ask, since the Due is also ARM Cortex-based.

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