Wiki: Directory of Wiki Pages


Wiki for Dreamcatcher 3.03

(added by @ac8dg as a starting wiki page, simplifies searching the Forums)
Please Edit and add a note to the revision history at the bottom

Currently in production
To purchase see

How to use as an Outernet (Now Othernet) - Skylark Receiver:

Software to use for other applications

  • Armbian Linux Based: Customized for the Dreamcatcher
    Suggested starting points are: “sudo nmtui” or armbian-config
  • Dreamcatcher Chat Application
    a. Code Block
    sudo git clone
    b. then just run the executable Code Block
    sudo ./chat
    c. the output should look like this:
    " Dreamcatcher Chat (v.0.0 alpha)
    " Select operating frequency (MHz):
    The value you enter is mixed with a Base Starting freq of 2400 MHz for a resulting +/- actual operating frequency

Power Supply Options:

Acquiring the Satellite

Case Options and Antenna Mounting Options

Unique information specific to which satellite is selected


Using linear transponder 11,902.400 MHz vertical polariation

  • Europe
  • Pacific
  • South Asia
  • Africa

Hardware Information

  • Transceiver Semtech sx1280/1
    datasheet (137 pages long)
    ** Lora, lorawan, fsk, SDR#, ect.

  • Single USB type A for connecting devices

  • Two mcro type B usb for 5vdc 2amp power,
    the second micro usb labeled OTG may be also used for power, and serial terminal connections

  • Speaker jack and Speaker pin connector
    1/8" (3.1 mm) mini both speaker and microphone jack appear to “stereo” l/r
    LED 10 should flash when outputting an audio signal, but under Skylark 5.3 does not. This is a bug to be fixed in the future.

  • Two sma connectors Direct and LNB.
    need more info on what the onboard lna performs

  • Supplied lnbf and jumper cable for SMA to type F coax
    Maverick Satellite MKI pll single standard ku band 11.7 - 12.2GHz
    10.750 GHz LO
    Power 13 or 18 vdc max 135ma

  • Touch screen display
    Power requirements 5v or 3.3v and 100ma
    A 40 pin GPIO extension ribbon cable can be used to remotely mount the display

  • The two sd card slots
    tested with up to 32GB micro cards. Must be good quality

  • Mounting holes

  • Various “points” on the main board (no longer has a jtag)
    uart terminals are typical interface is provided

  • Wifi mini usb device is supplied
    8011n,g,b 2.4 GHz with rf power 13~17 dbm
    Chipset Ralink5370

  • Reset button - push and hold 10 seconds to interrupt the intermediate power buss

  • Ventilation and cooling requirements
    Infra red scan shows the display, power regulator chip U-1 and Allwinner A13 to be warm

  • Replacing Parts

  • Schematic design layout

Othernet Satellite Radio

Othernet Satellite Radio is available by either use of the native Skylark App, or plugging a standard 3.5 mm stereo speaker into the speaker output plug on the Dreamcatcher Board. Audio is not stored in Skylark - - it is a live event. Othernet Satellite Radio is broadcasting Old Time Radio Podcasts and hourly Voice of America (VOA) News summaries.

Method 1 - - Native audio/sound is found in the About Skylark App in Skylark Version 5.4. Audio works on a different port (normal skylark works on the default http port, 80 - while audio streams in port 8090). Select this mode by going to About Skylark on the Applications Icons Screen

Applications Icons showing About Skylark

About Skylark Screen with MP3 Player selected for listening to Othernet Satellite Radio

Play Othernet Satellite Radio directly or select Othernet Satellite Radio and open it in a new browser window. You can also run it in a RealPlayer or Windows Media Player if you copy your network URL to the player. For example

Method 2 - - Use of a speaker plugged into the standard 3.5 mm stereo output plug. Some users connect the speaker output to an FM MP3 Player transmitter so they can tune to Othernet Satellite Radio on a standard FM radio. If you use a device that requires external power from a USB cord, make sure to power it from a separate power source. The Dreamcatcher power budget cannot support it.

In order to increase the volume of the audio/sound for the Dreamcatcher speaker plug, it is necessary to make an “on the fly” software modification to Skylark that only remains in effect as long as you do not reboot the Dreamcatcher. This change has no effect on the Native audio/sound mentioned in Method 1.

There are 2 ways make this adjustment. The first way is by using the Dreamcatcher Touch Screen to increase/decrease the volume at the audio output plug

Touch Screen for Adjusting Audio Level

If you find the Touch Screen too sensitive to the touch, suggest you follow the procedure discussed below in Software Configuration Information paragraph 2 to change the audio level.

Software Configuration Information

  1. Activating the audio amplifier for the two pin terminal connector
    a. un-mute all channels in alsamixer
    b. Enable Speaker PA via gpio114:
    c. Code Block
    sudo su
    cd /sys/class/gpio
    echo 114 > export
    cd gpio114
    echo out > direction
    echo 1 > value

  2. To adjust the audio.

    Download PUTTY
    Enter the IP address and leave it in SSH
    Login with othernet/othernet
    type “sudo alsamixer”
    Enter your password “othernet”
    Menus are at the bottom “Left Mixer” is currently “selected”. “arrow over once” meaning press the right arrow key once, to select “Power Ampl”, and then use the up/down arrow keys to increase/decrease volume.
    Future options may allow the setting to be stored: type “sudo alsactl store”

  3. Adjusting Display options

  4. Selecting Coax inputs Note: The only valid configurations are when rfswitch1 is off and rfswitch2 is on, or the other way round.
    a. Selecting Direct SMA Code block
    sudo su
    cd /sys/class/leds/rfswitch1/
    echo 1 > brightness
    cd /sys/class/leds/rfswitch2/
    echo 0 > brightness

  5. Turn on Bias-Tee to the Coax Connector
    a. Code block for 14 volt dc at both sma input connectors
    sudo su
    cd /sys/class/gpio
    echo 119 > export
    cd gpio119
    echo out > direction
    echo 1 > value

  6. Adjusting SDR parameter
    ** RF Amplifier Gain
    ** Lora and other SX1281 parameters
    The default for the chat application found in main.cpp:
    modulationParams.PacketType = PACKET_TYPE_LORA;
    modulationParams.Params.LoRa.SpreadingFactor = LORA_SF7;
    modulationParams.Params.LoRa.Bandwidth = LORA_BW_0400;
    modulationParams.Params.LoRa.CodingRate = LORA_CR_4_5;
    PacketParams.PacketType = PACKET_TYPE_LORA;
    PacketParams.Params.LoRa.PreambleLength = 0x08;
    PacketParams.Params.LoRa.HeaderType = LORA_PACKET_VARIABLE_LENGTH;
    PacketParams.Params.LoRa.PayloadLength = 50;
    PacketParams.Params.LoRa.Crc = LORA_CRC_ON;
    PacketParams.Params.LoRa.InvertIQ = LORA_IQ_INVERTED;

Notes/Revisions history

  1. Created 7/2/2018 @ac8dg
  2. Revised 7/6/2018 @ac8dg changed outernet to othernet
  3. added more hardware info 7/25/2018 @ac8dg
  4. added 3D printable case link @Tysonpower
  5. add audio alsamixer controls thanks to @jason_matonis 9/9/2018 @ac8dg
  6. Revised 9/10/2018 by @kenbarbi to add a User’s Guide for DC with Skylark 5.3
  7. Revised 9/11/2018 by @kenbarbi to add Easy Acc 20000mAh Power Backup, iCleaver Power cubes, SES-2 Footprints, Aquiring the satellite, and LNB Antenna enhancements.
  8. Revised 10/30/2018 by @kenbarbi to add Othernet Satellite Radio
  9. added port audio detail 11/06/2018 @ac8dg

Wiki for Dreamcatcher 3.02q

Wiki for Dreamcatcher 2

  • Alternative Uses for Dreamcatcher 2

flash this image to your sd card:
(readme file in that folder useful to get started, guessing you’ve done this part before though)

Then before updating any software via apt-get upgrade!
Follow the info on this post Dreamcatcher - DONT UPGRADE KERNEL BEYOND 5.27!

Wiki for SDRx

Wiki for Lantern

Wiki for moRFeus

Software to a usb for frequencies control at


The post above is a wiki. I believe anyone can edit it. Please do.

Outernet in L-Band no longer available?

Yeah, once we have more content in this and the other wikis, I’ll add a link up top.


Bumping this to get more information into the wiki.


Maybe someone can come up / develop a standard formatting scheme. Involving a paragraph numbering, headings, bullets… My first try needs some help.


So where is the othernet wiki? I’d love to help.



The stub of the wiki is this thread. If you scroll all the way up to the top of this thread, you’ll see the post that is editable by anyone on the forum. This thread is meant to be used as the wiki directory. Additional wiki-posts can be created when there is sufficient content for specific new topics. The links at the top of this page come to this post.


No, nothing to do with licensing. Just one more thing to maintain. The thinking is that since there is still a lot of conversation and questions surrounding usage, it’s best to keep the information on the forum.


So, Do I need install other operative system to run the chat application or it run over the Skylark?
Because I what to run Othernet and the chat application at the same time.



You can’t run Othernet and the chat application at the same time. The onboard radio hardware can only be used by one application at a time, so it can either be Othernet reception, or chat application.

Additionally, the chat application works on Armbian, while Othernet application is part of the Skylark OS. The chat application will not run on the Skylark OS.

You will need to get a second board if you want to run both.


Thanks for the information, I’m new in this topic


Is there anything special I have to do in order to load Armbian onto the board without the chat application?

–Konrad, WA4OSH


The armbian image does not include the chat application. If you want to run the chat application, you have to install it specifically.