3DR Radios

[alduxvm]

Hi!!

I'm controlling a MW board from Matlab/Simulink, I can send the RC commands and receive the attitude reading, with the USB cable plug in, works excellent, of course, but I need to have wirelessly...

I tried to just plug a 3DR radio on each side, and I get a super super lagged response, I know the limitations of this radios, but i cannot believe that send close to 20 chars and receiving the similar quantity will be enough for having 3 second delay...

Am I doing something wrong??? 3DR radios is not the way to go??? what other suggestion do you have??

cheers!!

[waltr]

What is a 3DR radio?
Link to specs/data sheet?

[EOSBandi]

1. Change 3dradio firmware to the multiwii aware one. (http://code.google.com/p/mw-wingui/downloads/list, Sik-Mw 2.3)
1. set serial speed to 56k
2. set air speed to 64k
3. disable ERROR CORRECTION
4. Enable Mavlink framing (with sik-mw 2.3 it means multiwii framing)
5. Use WinGUI 2.3 for as GUI for smooth telemetry...

That is all

[alduxvm]

Do I need the SiLabs debug adapter to change the firmware on the radios???

forget that question...

Im uploading the firmware with the python script, but I have a error, have you ever encounter this one?????:

Code: Select all

rdg_mac:Sik-mw-2.3 2049632v$ python sik_uploader.py --port /dev/tty.usbserial-AM0264PU radio~hm_trp.ihx 
uploading to port /dev/tty.usbserial-AM0264PU
Connecting to /dev/tty.usbserial-AM0264PU
Trying autosync

+++Traceback (most recent call last):
  File "sik_uploader.py", line 278, in <module>
    if not up.check():
  File "sik_uploader.py", line 237, in check
    self.autosync()
  File "sik_uploader.py", line 207, in autosync
    except fdpexpect.TIMEOUT:
AttributeError: 'module' object has no attribute 'TIMEOUT'

cheers!!!

[alduxvm]

Actually... how did you flash them???

[EOSBandi]

Actually... how did you flash them???

http://www.ardupilot.co.uk/ardupilot-software.html
Upload custom firmware

[alduxvm]

What is a 3DR radio?
Link to specs/data sheet?

I'm using this ones:

http://www.hobbyking.com/hobbyking/stor ... 15Mhz.html

[climb4hope]

1. Change 3dradio firmware to the multiwii aware one. (http://code.google.com/p/mw-wingui/downloads/list, Sik-Mw 2.3)

Andras,

What is specific about Sik-Mw firmware? Do you have the description somewhere and source code as well?
What is different there comparing to standard firmware using non-mavlink comm type?
Thank you.

[EOSBandi]

Here is the source
http://code.google.com/p/sik-multiwii/source/list
You can check the mods.. it is simply rewrite mavlink framing track to MSP framing....

The idea is that the variable air packet length is in sync with the incoming or outgoing MSP packets....

[climb4hope]

Thank you!

[alduxvm]

Thank you very much EOSBandi!!

I can confirm this firmware works on the original 3DR modems as well in the HK clones!!

[Steve_In_Brussels]

It seems to work very well and I had no problems with the upgrade. Even using the Bluetooth Bridge to my Android phone works with it well straight off. EOSBandi ==> Thanks for the good work.

I was wondering though -- why switch off the ECC? The 3DR Radio doc advises you to leave ECC switched on even though it reduces the effective baudrate (because it improves the range more than just reducing the baudrate). I'm a little mystified.

[robertha]

Hi,

when using the 433 MHz telemetry from HK or RCT then the ground station local noise is very high (80dB) and affect range significantly. I tested using second Air module instead (purchased from RCT) connected to USB by using USB to 232 TTL convertor - I use the FeiYu Tech cable from Hobbyking SKU: 276000001 - the value of local noise drop down to 40 dB - I did not test the range yet, but expect it will be doubled with existing antenas.

[EOSBandi]

Hi,

when using the 433 MHz telemetry from HK or RCT then the ground station local noise is very high (80dB) and affect range significantly. I tested using second Air module instead (purchased from RCT) connected to USB by using USB to 232 TTL convertor - I use the FeiYu Tech cable from Hobbyking SKU: 276000001 - the value of local noise drop down to 40 dB - I did not test the range yet, but expect it will be doubled with existing antenas.

433Mhz ground modules with embedded usb are wrong. 3DR ditched the design due noise problems and went with the extension cable (just like you). So on 433 avoid ground modules with usb....

[m3us]

Hi,

when using the 433 MHz telemetry from HK or RCT then the ground station local noise is very high (80dB) and affect range significantly. I tested using second Air module instead (purchased from RCT) connected to USB by using USB to 232 TTL convertor - I use the FeiYu Tech cable from Hobbyking SKU: 276000001 - the value of local noise drop down to 40 dB - I did not test the range yet, but expect it will be doubled with existing antenas.

433Mhz ground modules with embedded usb are wrong. 3DR ditched the design due noise problems and went with the extension cable (just like you). So on 433 avoid ground modules with usb....

Do you have any suggestions for good modules for this purpose ie controlling the Fc from PC wirelessly?

[NikTheGreek]

Hi.

Those modules http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=27096
can be flashed with SiK-mW 2.3 software ?

[Leo]

I'm curious... Is anyone using a Sik firmware other than Sik-Mw 2.3?

If so which version and why?

Leo

[stronnag]

I'm curious... Is anyone using a Sik firmware other than Sik-Mw 2.3?

If so which version and why?

Leo

https://github.com/stronnag/SiK-MSP. Based on a later SiK, works the way I want for mwptools. YMMV.

[Leo]

Interesting.... Thanks.

I'll have to give it a try.

[Leo]

I've just uploaded the FW on to my 433MHz ground/air module.

Is this correct?


What settings would you recommend I change?

[stronnag]

Set the Max Window to 33 to reduce latency.

[Leo]

Will do... Thanks.