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1  Using Arduino / Installation & Troubleshooting / Re: Pro-Mini upload problem on: November 25, 2013, 09:08:03 am
After reading around I decided that the Pro Mini did not have a bootloader. It seems that SparkFun sometimes omit  to burn a bootloader! Clearly their quality system needs improving.

I have a Uno, so I used the ArduinoISP sketch and followed the instructions at http://www.arduino.cc/en/Tutorial/ArduinoISP to burn a bootloader on to the Pro Mini. I could then upload sketches through the FDTI interface board (without needing to worry about resetting the Pro Mini) and so far all seems well.
2  Using Arduino / Installation & Troubleshooting / Pro-Mini upload problem on: November 22, 2013, 11:04:29 am
I am unable to get a new Pro Mini working. My Uno works fine, but when I try to upload a sketch to a new Pro Mini I get the message 'avrdude: stk500_recv(): programmer is not responding'. This is the first time that I have tried using a Pro Mini and all I have done to it is solder on a header for the FDTI board.

Details of system and results from following the 'Troubleshooting Guide' are below.

Linux Mint 14
Arduino IDE 1.0.1
Pro Mini 328 3.3V/8MHz
FDTI board (http://proto-pic.co.uk/ftdi-voltage-selectable-board/) with jumper set to 3.3V
USB is the only connection to the board (via the FDTI board)
(Photo attached)

In IDE, board selected is 'Arduino Pro or Pro Mini (3.3V, 8MHz) w/ ATmega328'
In IDE, Serial Port is dev/ttyUSB0
When I plug in the USB, red and green LEDs flash momentarily on the FDTI board and a red LED on the Pro Mini comes on. If there is a green LED on the Pro Mini, it does not come on.
Pressing the reset on the board does not cause any LED to flash.
Attempting to upload a sketch gives the message 'avrdude: stk500_recv(): programmer is not responding'.

Suggestions are most welcome.
3  Using Arduino / Networking, Protocols, and Devices / Re: RF module suggestion wanted on: January 18, 2013, 02:57:39 pm
My hope is to build a radio control set for a model aeroplane. To fly this in the UK requires the use of 2.4 Ghz and DSSS (or other bands and swap the crystal so as not interfere with other flyers). I am currently planning to send a packet containing control data every 20 ms and put measurements from the plane in an acknowledgement packet. I have no experience of RF communications (or of building anything 'real' using Arduino boards), so I am trying to research the options and experiment with a UNO board.

The AWA24S costs about £20, so I guess that is about right.
4  Using Arduino / Networking, Protocols, and Devices / RF module suggestion wanted on: January 17, 2013, 02:49:47 pm
I want to make two Arduino boards communicate over distances of up to 1 Km. Due to the application I will need to us RF transceivers that communicate over the 2.4 Ghz band and support Direct Sequence Spread Spectrum mode. I expect the Arduino to communicate with the RF module over an SPI, but would prefer not to use an XBee device since I would like more control over the protocol. So far I have only found the AWA24S by Artaflex, but it is a bit pricy.

Can anyone suggest an RF module that fits these requirements?
5  Using Arduino / Project Guidance / Re: 2-way radio control/telemetry... feasible? on: December 07, 2012, 04:01:29 pm
The RFM-70 may use the 2.4 Ghz band, but it does not appear to use spread spectrum technology, which may be problem depending upon where you want to fly your model. Also, the on-board antenna suggests that the range might be very limited.

The previous post uses an Xbee RF module, which has an amplifier and external antenna. However, I have read that the Xbee protocol includes automatic packet acknowledgement, which will reduce the effective RF bandwidth if you want to return values from the model. There is an Arduino compatible module (http://arduino-direct.com/sunshop/index.php?l=product_detail&p=190) with a range of 1 Km, but it again does not seem to use spread spectrum. There is, however, the AWA24S (http://www.artaflexmodules.com/sites/default/files2/DataSheet%20AWA24S.pdf) which has a good range, uses spread spectrum and has an SPI interface. However, it is a bit pricy.
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