Hi Everyone,
Maybe you know, i'm working on Open Source RC (OpenLRS) project since 1-2 years and we released it in this summer.
Today I just finished the firmware v1.10 with transparent serial bridge!
This mean, you can talk with autopilot or other telemetry modules without any extra telemetry device. Your OpenLRS Rx and Tx can handle this mission.
Download link:
http://code.google.com/p/openlrs/downloads/list
OpenLRS Forum link:
http://forum.flytron.com/viewtopic.php?f=7&t=4&p=1279#p1279
IMPORTANT:
Rx to Tx transmission supporting 750 byte/seconds (not bit/second) without any problem.
It's handling 9600 baud signals with %80 traffic.
But Tx to Rx (ground to air) transmission sharing the servo communication bytes and we are not suggesting more than 100 byte/second for ground to air transmission.
We are suggesting 115.200 baud serial speed (%5 traffic) for clear serial. If you want to use 9600 or near speeds dont forget; Atmega328(with Arduino) can read the signal with hardware without any problem, but it have to wait for next byte when writing. You must finish the writing before reading next RF package. This is why you need high speed communication when writing something on the serial out.
As a reference: In this video, i'm using 9600 baud on GPS side and 115.200 baud on computer side.
Thanks
Melih
-----------------------------------
Old Diydrones blog posts about OpenLRS Project
http://diydrones.com/profiles/blogs/new-opensource-lrs-coming
http://diydrones.com/profiles/blogs/the-openlrs-project-pcbs-ready
http://diydrones.com/profiles/blogs/the-openlrs-project-pcbs-ready
http://diydrones.com/profiles/blogs/openlrs-wii-motion-plus
Comments
Hi Jakaria,
Sorry for my later reply.
I'm strongly suggesting "Arduino Uno" platform for your project. It's including USB serial for your PC connection (and firmware loading) and have a lot of "serial to servo" firmware sample on the web. Just write your own ground station software and send the servo commands to arduino over USB serial. Arduino forums helps you for details.
Currently ArduCopter, ArduPlane used 57.600 baud for all telemetry communication as default and XBees handle those well. For really long distances you need to lower down telemetry speed but such as ArduCopters you usually cannot even fly so far that you will start having problems with 57k.
@Andrew, I guess you can configure the APM from source code for 4800 baud or 9600. because most of xbee modules supporting maximum 9600 or 19200 baud.
@Amilcar, Thank you very much, i will read it as soon as possible.
Here is the funny code implementation for OpenLRS :)
Melih I've learned git by listening to a Linus Trovalds talk at google headquarters, and by reading the git book at http://book.git-scm.com/index.html just make sure to skip the introduction chapter. It is confusing and un-necessary for normal users. Just skip directly to chapter 2
@Amilcar,
1. Because of flexibility of file. I wrote it as a pde file and we are changing something in every version. Maybe i can do it at the future.
2. Google code is very chaotic for me and i dont have time to learn it. Maybe i can do it someday but not now. Do you know any "simple" article about it?
@Dimitri,
As you can read on our product page, Booster is unidirectional device for long range features. You cant use it with telemetry features.
@Kim, I'm not sure about it. Because it's generating rf pulses and they affects the sensors of oilpan. A little distance is better for this kind of devices.
What about making it in such a way that the receiver can fit the oilpan directly on top of it?
Is it possible to put signal amplifier on rx or it's only for tx. It can be a range problem is there is 7w for tx and only 100mw on rx ;)
Hi,
Nice work. I wanted to use the RFM22 modules a while ago, I even bought a couple of them, but I did not use them yet.
I took a quick look at your files and have some questions:
1. Why not move the common rfm22.pde file to a library ?
2. Why not use the git features of googlecode ? It would allow for more people to contribute to it.
Regards,
Amilcar