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61  Using Arduino / Networking, Protocols, and Devices / Re: Some question about i2c, smb, wire.h and twi ... all together. on: January 11, 2013, 03:17:43 am
I confess, I am not sure exactly what you're asking. If you want to learn about interface technologies like I2C/TWI, SPI and so on, have a look here:

That's maintained by Nick Gammon (a participant here) an is a fantastic resource.

62  Using Arduino / Networking, Protocols, and Devices / Re: RN-42-SM Bluetooth Transmitter with Arduino Nano on: January 11, 2013, 03:10:49 am
What do you mean by "compatible?" That device won't just plug on to an Arduino, but I just read through the data sheet. It requires 3.3V, which is good. You talk to it using serial/TTL which is also good for most uses. It has an SPI bus but that is used only to flash new firmware into it.

So yes, I would call it compatible in that you can power and control it from an Arduino, but its not a shield. It would not be hard to build a shield to host this module, and I would bet someone already has.
63  Using Arduino / Networking, Protocols, and Devices / Re: Bluetooth master and slave, via SPI or I2C, maybe with HC-05? on: January 11, 2013, 02:51:57 am
After poking around, I can not find a chip to convert I2C or SPI to TTL. Of course it could be done with a uC and a little code, so perhaps I'll take that route.
64  Using Arduino / Networking, Protocols, and Devices / Re: Changes to external ip on: January 11, 2013, 02:49:45 am
The easiest way, although probably not the most efficient, is to use the String class. What version of the Arduino environment are you using?
65  Using Arduino / Networking, Protocols, and Devices / Re: SPI Communication using ONLY arduino libraries- no AVR code! on: January 11, 2013, 02:47:38 am
When coding micro controllers, its not unreasonable to expect some of the code to be hardware specific. The differences are probably beyond just register names. Different chips work differently. Some macro definitions may be all you need to solve it though.
66  Using Arduino / Networking, Protocols, and Devices / Bluetooth master and slave, via SPI or I2C, maybe with HC-05? on: January 10, 2013, 04:55:31 am
Hi All...

I'm looking for a way to equip an Arduino Uno (or any Arduino I guess) with Bluetooth Master or Slave capability. The idea is to be able to pair with one or more devices and push data to them, so I think the serial port profile is what I want. Typically, I'll want to make an Arduino feed data to an iPad, and iPhone, an iPod Touch or a variety of Android tablets and phones.

As near as I can tell, there is no module that would combine BLE with earlier versions. Since I want to send frequent data updates in large(ish) packets BLE is probably not appropriate anyhow.

I found a shield that is essentially an HC-05 mounted on a proto board, but here is the trick. I would prefer to talk to it using I2C or SPI, as my UART is already in use and I really dislike SoftwareSerial.

The HC-05 has an SPI port, but I took a look at the data sheet and it was not clear to me if the SPI port is exclusively for flashing firmare into the module or if I could actually command the module using SPI? If I can command the module using SPI I can wire up my own proto shield and have at it. Does anyone know?

If I can not command the HC-05 via SPI, what would you all suggest? I suppose I could:

- Find another hardware solution, does anyone know of one?

- Build the circuit to convert either I2C or SPI to TTL serial. It seems to me that there should be a single chip solution for this, anyone know of one? If there is, then building a shield that does BT master or slave with the HC-05 should be easy enough.


67  Development / Other Software Development / Re: New FreeRTOS examples for AVR and ARM on: January 10, 2013, 01:03:35 am
This is fantastic, thank you!

Which edition is the best to purchase?  M3?  Standard?
68  Products / Arduino Due / This thing is really nice! on: January 10, 2013, 12:40:01 am
I finally tried out my Duo today, wow what a nice board! Crossroads and I did a project based around a 1284P. We added two additional serial ports for a total of 4 and a USB interface. It would have been amazingly easier based on this design. I was checking out the Eagle files. I sure wish we had this then! I'm tempted to redo it!
69  Products / Arduino Due / LED Brightness on: January 10, 2013, 12:37:40 am
I'm feeding my Duo with about 6.6VDC, and I find that the PWR and L LEDs are quite dim. Is this normal?
70  Products / Arduino Due / Re: Tombstones on Due on: January 09, 2013, 10:05:59 pm
On 2 of 4 Due's I had Tombstones (wrong soldered SMD-Devices, stand up instead lie flat), if your Due has a strange behavior take a look.

well that never should have made it to you. Somewhere in QA it should have been rejected. That's caused by poor paste distribution, improperly placed component or some similar problem in the manufacturing process.
71  Products / Arduino Due / Re: Purchase the SAM3X8E? on: November 16, 2012, 05:42:11 pm
If you need a couple of SAM3X8Es, just contact Atmel directly for samples. The problem is the test sockets. They are expensive...unless you have skills soldering.

Maybe I should build up a breakout board and have a bunch soldered up... There might be a call for that since the Duo is now out.
72  Products / Arduino Due / Re: Free RTOS on: November 12, 2012, 04:57:05 pm
Fantastic!  I can't wait! Thanks!
73  Using Arduino / Networking, Protocols, and Devices / Re: Arduino wifi shield firmware on: November 11, 2012, 10:18:20 am
I guess what I should have asked is, can new firmware be installed in the wifi shield UC3 processor?

74  Products / Arduino Due / Free RTOS on: November 11, 2012, 10:02:24 am
I see that Free RTOS supports SAM 3X series. I have never ported an RTOS, does anyone have an idea how difficult it might be to make Free RTOS run on the Duo?
75  Using Arduino / Networking, Protocols, and Devices / Arduino wifi shield firmware on: November 11, 2012, 02:05:57 am
Hi All...

Does anyone know if its possible to write custom firmware for the Arduino wifi shields UC3 processor? Is the source available?

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