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com:jdrf900x [2019/05/08 07:21]
metro
com:jdrf900x [2019/05/08 07:31] (current)
metro
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-==== 3 SOFTWARE / GCS SUPPORT ====+==== 3 PHYSICAL DIMENSIONS ==== 
 + 
 +{{:​com:​rf900xdimensions.jpg?​direct&​600|}} 
 + 
 +---- 
 + 
 +==== 4 SOFTWARE / GCS SUPPORT ====
  
 The software solution (see Useful Links) is an open source development which is also compatible with jD-RF900 Modem Tools (see Useful Links) and the 3DR Radio Config (see Useful Links) from 3D Robotics. It is called “SiK” and was created by Mike Smith and improved on by Andrew Tridgell and RFDesign. ​ The software solution (see Useful Links) is an open source development which is also compatible with jD-RF900 Modem Tools (see Useful Links) and the 3DR Radio Config (see Useful Links) from 3D Robotics. It is called “SiK” and was created by Mike Smith and improved on by Andrew Tridgell and RFDesign. ​
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-==== ANTENNA CONNECTIVITY ====+==== ANTENNA CONNECTIVITY ====
  
  
-=== 4.1 Diversity ===+=== 5.1 Diversity ===
  
  
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-=== 4.2 Types of Antennas ===+=== 5.2 Types of Antennas ===
  
  
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-==== NETWORK OPTIONS ====+==== NETWORK OPTIONS ====
  
  
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 network. Available for download from the website (see “Useful Links”). network. Available for download from the website (see “Useful Links”).
  
-=== 5.1 Simple pair (P2P) ===+=== 6.1 Simple pair (P2P) ===
  
 The out-of-the-box firmware of the RFD900x radio modem is set to work in simple pair mode. If you The out-of-the-box firmware of the RFD900x radio modem is set to work in simple pair mode. If you
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-=== 5.2 Asynchronous non-hopping mesh ===+=== 6.2 Asynchronous non-hopping mesh ===
  
 The asynchronous non-forwarding mesh firmware offers a straight forward communication option that The asynchronous non-forwarding mesh firmware offers a straight forward communication option that
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 {{:​com:​nodes2.jpg?​nolink&​400|}} {{:​com:​nodes2.jpg?​nolink&​400|}}
  
-=== 5.3 Multipoint synchronised mesh ===+=== 6.3 Multipoint synchronised mesh ===
  
 The network requires that one of the devices assumes a base role to control the timeslot distribution The network requires that one of the devices assumes a base role to control the timeslot distribution
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-==== AT COMMANDS ====+==== AT COMMANDS ====
  
 The jD-RF900 modem can support the Hayes ‘AT’ modem command set for configuration. The AT command mode can be entered by using the ‘+++’ sequence. When doing this, you have to wait for 1 second before and after entering the command mode in order to prevent data being interpreted as data. When you are successfully in the AT command mode, an ‘OK’ prompt will be displayed on the screen and the jD-RF900 modem will stop displaying information from the other modem. Whilst in AT mode, you can use the AT commands to control the local jD-RF900 modem or the RT commands to control the remote modem. ​ The jD-RF900 modem can support the Hayes ‘AT’ modem command set for configuration. The AT command mode can be entered by using the ‘+++’ sequence. When doing this, you have to wait for 1 second before and after entering the command mode in order to prevent data being interpreted as data. When you are successfully in the AT command mode, an ‘OK’ prompt will be displayed on the screen and the jD-RF900 modem will stop displaying information from the other modem. Whilst in AT mode, you can use the AT commands to control the local jD-RF900 modem or the RT commands to control the remote modem. ​
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-==== AIR DATA RATE ====+==== AIR DATA RATE ====
  
 An air speed of 64kps will give a range of about 40km depending on antenna. If the air speed is set to be lower, the range of the wireless link increases but the amount of data that you can send will be limited. Therefore one has to compromise between range and data rate. The data rates that you can choose are only limited to 2, 4, 8, 16, 19, 24, 32, 48, 64, 96, 128, 192 and 250.  An air speed of 64kps will give a range of about 40km depending on antenna. If the air speed is set to be lower, the range of the wireless link increases but the amount of data that you can send will be limited. Therefore one has to compromise between range and data rate. The data rates that you can choose are only limited to 2, 4, 8, 16, 19, 24, 32, 48, 64, 96, 128, 192 and 250. 
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-==== 8 Frequently asked questions ​(FAQ) ====+==== 9 FREQUENTLY ASKED QUESTIONS ​(FAQ) ====
  
-=== 8.1 How many antennas do I need to use? ===+=== 9.1 How many antennas do I need to use? ===
  
 One is the minimum. Two is recommended. One is the minimum. Two is recommended.
  
-=== 8.2 How do I connect the FTDI cable to the modem? ===+=== 9.2 How do I connect the FTDI cable to the modem? ===
  
 The black cable of the FTDI (pin 1) should connect to pin 1 on the modem.\\ The black cable of the FTDI (pin 1) should connect to pin 1 on the modem.\\
 {{:​com:​ftdicableconnection.jpg?​nolink&​300|}} {{:​com:​ftdicableconnection.jpg?​nolink&​300|}}
  
-=== 8.3 What do I need to upload the firmware or to change the modem configuration?​ ===+=== 9.3 What do I need to upload the firmware or to change the modem configuration?​ ===
  
 Download the latest firmware (see “Useful Links”). Download the RFD900x Modem Tools (see “Useful Download the latest firmware (see “Useful Links”). Download the RFD900x Modem Tools (see “Useful
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 Manual”). Manual”).
  
-=== 8.4 I upgraded to asynchronous firmware and the modems don't connect anymore? ===+=== 9.4 I upgraded to asynchronous firmware and the modems don't connect anymore? ===
  
 The default setting for a modem is to have a NODEID set to 1 and DESTID set to 2. As communication The default setting for a modem is to have a NODEID set to 1 and DESTID set to 2. As communication
 is addressed NODEID must be different for all units and DESTID will set the modems to connect to. is addressed NODEID must be different for all units and DESTID will set the modems to connect to.
  
-=== 8.5 How do I configure 2 base stations and one Airborne platform with 3 modems? (Asynchronous) ===+=== 9.5 How do I configure 2 base stations and one Airborne platform with 3 modems? (Asynchronous) ===
  
 Set the Airborne platform as follows: Set the Airborne platform as follows:
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-==== USEFUL LINKS ====+==== 10 USEFUL LINKS ====
  
 **RFD900x Firmware**\\ **RFD900x Firmware**\\
com/jdrf900x.txt · Last modified: 2019/05/08 07:31 by metro