DIY Cosmostreamer Wired

How To Assemble and Configure

Cosmostreamer Wired for DJI Zenmuse gimbals - Assembling instruction

You can assemble it for free, but you have to buy a license! Go here

photo: Cosmostreamer Wired with Companion Board and DJI Osmo extension cable and X5R


Video instruction

Not ready yet :-(


Required list


Basic assembling

1. Download ZIP-archive with microSD card image, cosmostreamer-wired.sdcard.img.zip

2. Extract .img file from downloaded ZIP archive

3. Write .img file to microSD card. Use Win32DiskImager application, or any other, that can write images

3.1 If you already has license key - you can install it on microSD card (how to)

4. Insert microSD card into Raspberry Pi Zero

5. Ok, basic assembly is done. Now power on Raspberry Pi Zero (5V on micro-USB power port), it must start booting.

6. After boot ended HDMI will show something like this:

"Bad license key" message means license key wrong or absent. In the bottom left corner message contains Raspberry Pi serial number and Cosmostreamer application version. Camera connection not worked without license key.


License key

For full Cosmostreamer functionality license key is needed. It is a small string stored in file /boot/license.txt on microSD

At the current time there is no automatic key retrieve system. So you need to send e-mail to cosmostreamer@gmail.com. Please, specify a serial key of you Raspberry Pi (see on HDMI on bottom-left corner) and your PayPal account in this e-mail. I will issue a bill for payment and after payment i will send you a license key for Cosmostreamer on your Raspberry Pi.

The license key is unique for each Raspberry Pi!

Options for installing a license key

  • Use a CosmoViewer application for Windows.
  • Insert microSD with written image into PC/laptop card reader. Operating system will detect a card. If your operating system is Windows - disk with label "boot" will be found. Just copy license.txt from e-mail answer on this disk.


Software update

When i fixing bugs or adding some features to Cosmostreamer application, i make a special file for update. You not needed to rewrite microSD card, you can just install update file. It is possible from CosmoViewer for Windows application, or from a web interface.

You need to download update file. Direct link: cosmostreamer.tar.gz. Change log and old versions here.

For update from Windows app:

1. Start a CosmoViewer for Windows

2. Right mouse click on window and select "Box settings" item in menu

3. Open tab "Info"

4. Click "Select" button near of "Firmware upgrade" label

5. Select downloaded file cosmostreamer-wired.tar.gz

6. Click "Upload" button. Update file will be send to a Raspberry Pi, after this update begins. After finish, Raspberry Pi will automatically reboot.

For update from web interface:

1. Open web interface:

2. Open menu item "Info"

3. Click "select file" button. Select downloaded file cosmostreamer.tar.gz

6. Click "Upload" button. Update file will be send to a Raspberry Pi, after this update begins. After finish, Raspberry Pi will automatically reboot.


Companion Board

Easiest way to get Wired connection

Soldered directly to RPI Zero pins.

Contains power regulator (makes 5V from input 12-26V), CAN adapter, Sbus invertor, CAN terminal resistor, standard DJI 8 and 10 pin connectors, etc.

Companion Board connectors pinout


3+3.3V output
5+5V output




3+5V output


1Servo out
2PPM2 in
4+5V output
5RC1 ch1
6RC1 ch2
7RC1 ch3
8RC1 ch4
9RC1 ch5
10RC1 ch6
11RC1 ch7
12RC1 ch8

Companion Board switches


CAN terminal resitor enable/disable. ON = enabled, OFF = disabled. Just set it "ON" and forget.


Invertor for UART RX. ON = enabled, OFF = disabled. For SBUS input need to set it "ON"


USB selector (DM368/AMBA switch). ON = use DM368 USB, OFF - use Amba USB. Usable only with Inspire1 camera mount.


Connection scheme


Common basic connection scheme

For a basic features just a CAN bus and USB are needed.


CAN-bus connection

Raspberry Pi Zero has no an own CAN-bus, so we need to connect a CAN-adapter (small MCP2515 based board).

1. Replace quartz oscillator on MCP2515 board. In stock there is a only 8Mhz crystal, but we need a 16MHz. Unsolder 8MHz and solder 16MHz crustal. It is easy, just two pins.

2. Connect MCP2515 board to Raspberry Pi Zero. DON'T FORGET TO CUT A LANE HOW IT DRAWED ON IMAGE.

Now we have a two CAN output wires: LO and HI. Later we will connect them to camera.


USB connection

More easy than CAN. Just connect Raspberry Pi's USB and DJI camera connector.

Here is two variants. Use standart Raspberry Pi's micro-USB connector, or solder wires to solder points on back side of Raspberry Pi Zero.

1-st variant. Using a micro-USB connector.

2-nd variant. Soldering to a solder points.


Gimbal conection

DJI cameras for Osmo or for Inspire 1 has an own connector, but with some differencies. X5/X5R can't be connected directly to Osmo connector, because the ring is some more than needed. Need to use a Osmo X5 adapter.

Osmo cams (X3 black, X3+ (Z3 black)) can't be connected to a M600 camera mount, because they can't operate in Inspire mode.

Connection with Osmo adapter has advantage - more cable length from Raspberry Pi Zero to camera, up to 1.5 meters long.

With an Inspire adapter maximum USB and CAN cable len from Raspberry Pi Zero to camera - around 20 cm. If more - video will be choppy or not be work. Better to use shielded cables.

With Osmo Extension Cable

Take the Osmo Extension Cable (DJI Osmo gimbal extension (part89))

We need only female connector, cut on length that you want.

Cable pinout:
Red, GreenPower + (12-26V)
Black, Brown thickPower GND
Thin silverUSB GND
Thick silverPower GND
YellowUSB D+ (Ambarella)
WhiteUSB D- (Ambarella)
Blue thinUSB D+ (DM368)
RedUSB D- (DM368)
Brown thinCAN HI

CAN HI and LO used for control commands and telemetry.

USB D+ D- (Ambarella) and USB GND used for video receive from Osmo cams X3 black, X3+ (Z3) black

USB D+ D- (DM368) and USB GND used for video receive from cams X3 white, X3+ white (Z3), X5, X5R

Connect wires with same names, USB wires or for DM368 or for Ambarella.


With Inspire adapter

Easy. 10-pin connector - for camera power. From 12 to 26 Volts. 8-pin connector - for USB and CAN.


With M600 adapter

Only Inpire mode available

Cable adapter for M600 connection to Companion Board


RC receivers connection


One or two RC receivers can be connected. First RC can be PWM or PPM. Second - PPM or Sbus. Signal mode (PWM, PPM, Sbus) can be switched in web-admin page or in Windows application.

On this images RPI 3 is drawn, pinout is the same as on RPI Zero

All channels are connected with the example for Turnigy 9X. Mode 2. Model type: Acro

Channels set-up

channel 1 - PAN
channel 3 - TILT
channel 4 - ZOOM (if supported)
channel 5 - (AUX-CH "GEAR") - RECORD
channel 6 - (AUX-CH "HOV THRO") - EV compensation
channel 7 - (AUX-CH "THRO HOLD") - MENU (labeled as CENTER on image)
channel 8 - (AUX-CH "HOV PIT") - MANUAL FOCUS (if supported)

Doesn't matter channels connection order. Any hardware channel can be mapped into any function in a web-admin page or in application

Need to enable auxillary channels in Turnigy settings. Enter menu, part "AUX-CH" and set values:

For another remote control system - read it's manual, how to set-up auxillary channels.

Don't forget to enable RC in Cosmostreamer settings. Menu -> "Inputs" -> "RC input enabled". After transmitter is powered on HDMI will show "RC calibrating" message. Near will be axis values shown. It was made for easy config. Check channels with my scheme.

Channels calibrating is at first transmitter power on. Need to move left and right stick up-down, left-right to minimal and maximal position. And rotate EV and FOCUS to min max position. After this calibrating is over. Move pan/tilt stick to down-left position and quckly release. All message for RC will be hidden. Normal working mode is on.


Custom I2C joystick



Camera shield


For camera mechanical protection motorized shield control supported. Shield automatically opens when photo or video recording is active and automatically closes after timeout (shield_timeout param in config file)


Config file

Cosmostreamer Wired settings saved in file /boot/cosmostreamer-wired.conf. It is a usual text file, which can be edited. You can insert microSD into card-reader and edit this file.

Config parameters description

Parameter names may be changed in a newer firmware versions
Parameter Description
disabled=0 Run Cosmostreamer wired application at boot or not. Used for debug.
0 - run
1 - don't run
camera_type=0 Camera type
0 - X3 black (from Osmo)
1 - X3 white, Z3, X5, X5R
device_mode=0 Camera work mode
0 - as Osmo (always horizontal)
1 - as Inspire (free movement)
cooperative_mode=0 Cooperative mode
0 - without Inspire flight controller
1 - with Inspire flight controller
control_enabled=1 Camera control
0 - disabled
1 - enabled
hdmi_enabled=1 Use HDMI or TV-out
1 - show video on HDMI
0 - show video on TV-out
rc_input_enabled=0 0 - do not use RC receiver
1 - use RC receiver
rc_input_speed_pan=100 Pan speed for RC receiver. From 0% to 100%.
rc_input_speed_tilt=100 Tilt speed for RC receiver. From 0% to 100%.
rc_input_speed_dutch=100 Dutch speed for RC receiver. From 0% to 100%.
i2c_input_enabled=0 0 - do not use I2C joystick
1 - use I2C joystick
i2c_input_speed_pan=100 Pan speed for I2C joystick. From 0% to 100%.
i2c_input_speed_tilt=100 Tilt speed for I2C joystick. From 0% to 100%.
i2c_input_speed_dutch=100 Dutch speed for I2C joystick. From 0% to 100%.
osd_enabled=1 1 - show OSD
0 - don't show
hud_enabled=1 1 - show HUD
0 - don't show
osd_borders=30 Set the height of top and bottom black borders below telemetry on HDMI
osd_top_offset=20 Set the vertical top offset 20 pixels for top-sided text labels on HDMI
osd_bottom_offset=20 Set the vertical bottom offset 20 pixels for bottom-sided text labels on HDMI
shield_enabled=0 0 - don't control a camera shield
1 - control a camera shield
shield_timeout=0 Time (in seconds) for automatical shield close
shield_open=1950 PPM position of servo for shield in opened state (in microseconds)
shield_close=1000 PPM position of servo for shield in closed state (in microseconds)


Network access

Only if Raspberry Pi with Wi-Fi used

If your Raspberry Pi configured as a Wi-Fi access point (by default) - you can connect to it and open url in browser http://my.cosmostreamer.com or

Wi-Fi network name (SSID) - "cosmostreamer-wired". Default password - 1234512345

In other case, you need to enter your Raspberry Pi' ip in browser. For example,

If you using a Mac, Ipad or Iphone (or Windows with iTunes installed) - you can open web interface by the link http://cosmostreamer.local