Gemini-2 and Gemini-1 Telescope Mount Controller
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Connecting to Web interface of Gemini 2

This guide will help you connect using the Ethernet connection to your Gemini 2.  NOTE: "PORT E" AT THE TOP IS NOT AN ETHERNET PORT.  DO NOT CONNECT AN ETHERNET CABLE INTO IT.
Advantages of using Ethernet over other connections interfaces.
  1. Can access the web interface of the Gemini-2.
    • Use with wireless router to provide wireless control via Smart Phones/Tablets
    • Can select all of the targets in all the catalogs.
    • Can upload individual files to the SDcard, such as updates to the main Processor, or updates to the hand controller.  Can also upload catalogs to the hand controller.
    • Can see the status of all the ports, battery, and power connections.
    • See how the servo motors are preforming.
    • You can almost totally control the Gemini-2 with the Web interface alone if you want.
    • It provides for slewing to targets,
    • building a model,
    • moving the telescope,
    • setting almost all setting.
    • Watching what the ports, and power levels are doing. 
    • Longer wire lengths than USB or serial without special made cables.
    • Faster than USB or serial.
    • Can be made wireless.
    • Can FTP into the micro-SDcard to save models, PEC and other setting to a computer and restore them.
    • Ethernet cable can be less expensive.
    • More reliable.
    • Less cables to the Gemini-2.
    • Access the Gemini-2 from any computer on your network.
    • Able to Update Firmware via an FTP connection.

 

  1. Can control the mount using the Gemini.net ASCOM driver.
    • Mount Control
    • Guiding through the same connection - called pulse guiding
  2. Provides some ground loop isolation
  3. Not restricted to short distant, as USB is.
  4. If a wireless adapter such as a  Netgear WNCE2001 or D-Link DAP-1350 is used then wireless Wifi connection to the mount.

Connecting to a Network:
Gemini 2 firmware can be updated using a built-in web interface. In order to use the web interface, you will need to make a network connection between Gemini and your computer. Note the Ethernet Port on the Gemini-2 is a dual speed port (10/100).  It is either 10Mbits per second or 100 Mbits per second which is determined by the device you are connecting too.  It takes a 3 speed port such as  a 10/100/1000 Mhz port to detect what kind of cable is being used, (normal or cross-over.) Most modern routers are now what is called Gibit Routers (10/100/1000) speed and can detect the cable type. The Gemini-2 cannot determine the cable type.  But this only has to be done on one end of the cable by one GBit Device, IE a Gibit Router or Switch. 
  1. Using a router. This is called Network with DHCP.  I find this the easiest method.  The router can assign the Gemini-2 an IP address, as long as the base subnet address of the router is in the http://192.168.x.xxx range.  If it is not, then you will have to manually change the Gemini-2 IP address to match the routers base Default Gateway address.   Examples would be change the gemini-2 Default Gateway address to http://192.168.0.1, which it normally defaults to.  Some routers such as Netgear brands use http://192.168.1.1 for there Default Gateway so you would put the Default Gateway to 192.168.1.1.  With these setting then the router can assign an empty DHCP IP address to the Gemini-2. On any local network, no two devices can have the same IP address. All devices on a network must have it's own unique IP address.
  2. The Direct method. This method uses a Ethernet cable directly between you computer and the Gemini-2.   If your computer has a 10/100 Mbit Port, then you will have to use a Crossover cable.  If your computer has a 10/100/1000Mhz port then you can use either a crossover or a standard patch cable. A hub might also be inserted into this method, and then standard patch cables can be used. Note: A hub does not provide any method of changing IP addresses.  I would like to recommend a USB to Gigabit Ethernet adapter instead of a cross-over cable if your computer does not have a 10/100/1000 bit Ethernet port, and you do not want to use an external hub.  This will give your computer 2 hardware Ethernet ports, assuming your computer already has one.
  3. Here is a drawing of these methods, the top 2 illustrations are the direct method and the bottom is the Router method. Now if the router or switch is 10/100/1000 (Gigabit) then either type of cable can be used.

The Direct Method:
This is most easily done using a cross-over Ethernet cable directly between Gemini’s Ethernet connector and your computer’s network connector.   If your computer has a 10/100/1000Mhz port then you can use either a crossover or a standard patch cable. Alternatively, you can use an Ethernet hub (not  a router) and standard cables between Gemini and the hub and between your computer and the hub.

IP Address: In order to successfully communicate with your computer over the network, the Gemini 2 unit must have an IP address on the same subnet as the computer. There are several ways to do this depending on how you connect Gemini to a network. The following sections describe these methods.

If you use a direct Ethernet cable to directly connect your computer to Gemini, you’ll need to assign both the computer’s Ethernet port and Gemini-2 to IP addresses on the same subnet by hand. This assumes that your computer is not running a DHCP server on the network port. By default, if Gemini doesn’t get an IP address assigned by DHCP, it will use its stored value (192.168.0.111) by default).  I know of no computer that can assign attached devices a DHCP address unless you have set it up for Internet Connection sharing.  So the Static address is usually a must.

  1. Use a direct cable to connect Gemini 2’s Ethernet port to an Ethernet port on your computer. What type of cable depends on your computers port specifications, see above.
  2. Use the appropriate tools on your computer to assign a static IP address to the computer’s Ethernet port. Use either my instructions for Windows 7 and XP or these (How-To Geek has a web page telling how to assign a static address in a computer for Win7 or XP.) or for Win8 go here. The address should be in the form 192.168.0.xxx where xxx is any number between 2 and 254 except 111. Also make sure no other device is using the same address.  No two Ethernet devices can use the same address on a network.  Set the subnet mask to 255.255.255.0. Set the default gateway to 192.168.0.1
    On Windows, you can do this from the control panel. Look for an option to change network connections. Refer to your OS documentation for specific instructions.  Now if you have a router such as a Netgear, then that routers default gateway is more than likely going to be 192.168.1.1  If your routers gateway looks like this, then you probably want to use setting to match that.  Change your computers hardware port to an address that is the form 192.168.1.xxx where xxx is any number between 2 and 254 except 111. Set the subnet mask to 255.255.255.0. Set the default gateway to 192.168.1.1   Now set the Gemini-2 to 192.168.1.111 using the hand controller.
  3. Power on Gemini and attempt to access the web server at http://Gemini or http://192.168.0.111.  or as above if your network is not using the same gateway address.  If this doesn’t work, use the hand controller menu to ensure that Gemini’s IP address is http://192.168.0.111 by selecting the menu->mount->network options. If it is not set to that address, then you can either change your computer’s IP address to match Gemini’s IP address or you can change Gemini’s IP address to match your computers. 
  4. Gemini uses NetBIOS name resolution so that you don’t need to type the IP address into your browser. If you haven’t already done so, enter http://gemini in your browser to access the web server. The username is “admin” and the default password is blank. Here us an example of the login screen (with the user name already added):
  5. If the steps in step 4 above do not work, you may need to enable NetBios over TCIP.  The sets are listed at the bottom of this page.


Fig 1

Network with DHCP:
Supports (typical configuration for most home networks with a router): If you are connecting Gemini to an existing network through a switch, hub, router or wireless adapter, and there is a DHCP server on the network, use this procedure. Gemini will be assigned an IP address by the DHCP server. It is important that your computer also be set to either use DHCP to get an IP address, or use a static IP address on the same subnet.
  1. Connect the Gemini 2 unit to the existing network through a hub, switch, router or wireless adapter.
  2. Power Gemini on. It is important that you do this only after you’ve connected the network cable so that it can communicate with the DHCP server.
  3. Make sure your computer is set to receive an IP address from DHCP. Each operating system does this in a different way, so refer to your OS documentation.
  4. Gemini uses NetBIOS name resolution so that you don’t need to type the IP address into your browser. Enter http://gemini in your browser to access the web server. The username is “admin” and the default password is blank. If you can connect to the Gemini-2 using an IP address in your computer's Web Browser, but not using http://gemini then you can almost bet that the NetBios resolution is turned off for your computer. See below for how to turn it on.
  5. You may optionally configure your DHCP server to assign a specific address to Gemini so that you can always access it using the same IP address. See the documentation for your DHCP server for details how to do this. Note: your DCHP server is often built into your internet router.
Network without DHCP Support:
You may also have an existing network that does not use a DHCP server to assign IP addresses. Such a network may be using IP auto configuration or static IP addresses in all of your machines.
  1. Connect the Gemini 2 unit to the existing network through a hub, switch, router or wireless adapter.
  2. Power Gemini on.
  3. Power your computer on, if it is not on already. Look to see what IP address is assigned to the Ethernet port on your computer. Each OS has a different way to do this, so refer to your OS documentation. On most versions of Windows, you can type “ipconfig” in a command prompt to see the IP address.
  4. Use the hand controller menu->mount->network buttons to access Gemini’s IP address. Uncheck the DP checkbox. Click on the IP address field and change it to an IP address on the same subnet as you computer. For example, if your computer’s IP address is 169.254.36.12, you should set Gemini’s address to 169.254.36.xxx where xxx is a number between 1 and 254 other than 12. You should also ensure that you do not set Gemini’s IP address to be the same as any other node on the network.
  5. Gemini uses NetBIOS name resolution so that you don’t need to type the IP address into your browser. Enter http://gemini in your browser to access the web server. The username is “admin” and the default password is blank. Note: Firmware versions after Feb 10, 2011 behave as described above. Versions between Feb 6th and Feb 10th don’t support NetBIOS name resolution, so you must type the Gemini’s IP address in your browser rather than using the hostname “Gemini.” Versions previous to Feb 6th do not support DHCP and must be configured as if you are using a cross-over cable or network without DHCP server as described above. Versions between Jan 23rd and Feb 6th use 192.168.0.111 as the IP address, and version prior to Jan 23, 2011 use 192.168.0.100.

Configuring the ASCOM Gemini.net Driver to use an Ethernet connection:
Of course to use the ASCOM Gemini.net driver, you must have ASCOM 6.1 installed and also the Gemini.net ASCOM driver. See http://www.ascom-standards.org/index.htm to download the latest ASCOM Platform, and then you can get the latest driver from this site. See the Menu selection at the top of the page Under Gemini-2 and download the Gemini.net ASCOM driver. Use Admin privileges to install both, by right clicking on each and select install as admin. This will save you problems with security problems later on. Once you have the Gemini.net driver installed, goto this page to Configuring the ASCOM Driver Ethernet port.

Enabling NetBios over TCIP for Local Network:
Netbios is what will allow you to use the http://gemini  if using a web page to access the Web interface,
or ftp://admin@gemini if using Windows File manager to access the directories/files of the micro SDcard, instead of http://192.168.0.111 (or what ever the Gemini-2 ip address is), or again ftp://admin@192.016.0.111 for accessing the SD card contents.
 
Some Windows systems do not have NetBios enabled.
Note: Normally the default setting on Windows assumes the following: "Use NetBios setting from the DHCP server." 
However, if a static IP address is used or the DHCP server does not provide NetBios setting, then enable NetBios over TCIP"
See this page for instructions on how to do this for Windows 7, XP and 95/98/ME.
There is also one other thing to take into account when connecting the Gemini-2 itself, or any WiFi enabled device. If you are using a bridge to connect the Gemini-2 using WiFi then you need to be aware that some routers let you block WiFi connected devices by there MAC address.  See FAQ #3.
Microsoft Net Framework 4.5 is required for the Gemini.net driver and ASCOM 6.1 to function.  Note that Microsoft Net 3.5 Framework is installed by default in Windows 7, but it might not be turned on.  You will have to download the Net Framework 4.5 from Microsoft.  See  Microsoft .Net Framework 4.5
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