Other than "you get what you paid for" Anyone have a reason Not to buy this pair? 

My personal goal would be to use it as a learning tool, prepairing for adding telemetry to my projects. But it should be usefull too.  Secondary use in some project around the house, ie halloween automation, laser guided water splasher (anti-cat crap in the yard device currently in planning stage) ect.


Here's the Junk:

This package consists of two mini half-duplex wireless data transceiver modules and each such module is highly integrated with an ultra speed MCU and a powerful RF chip. With the introduction of the innovative yet higly-efficient encoding method, its anti-interference ability and sensitivity are significantly improved. Features like various channel options, ultra long transmission distance (1000 meters) or abundant interfaces (UART/TTL, RS-485 & RS-232) helps make the transmission of data of any size possible and eliminate the needs of writing transmission program and running complicated settings. A software application ("RF-Magic") is offered for free so that users can modify the settings of the module. Besides, its slim size and wide power supply range makes itself the most popular selection of many applications in different fields.


  • Ultra long transmission distance: 800-1000 meters @1200bps
  • Working frequency: 431-478Mhz (1KHz step)
  • +3.3-5.5V wide power supply range
  • -112dBm(9600bps) high sensitivity
  • Over 100 channels
  • GFSK modulation
  • Highly efficient cyclic interleaving error correction encoding
  • Flexible software programme option settings
  • Selectable RFID index
  • UART/TTL, RS-485 & RS-232
  • Large data buffer: 512bytes
  • Suitable for massive data transfer
  • Built-in watchdog ensures long-term operation
  • Length of antenna: 104.32mm

Product Link:

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  • Moderator

    Just got some, they work fine over short distances so far but I haven't tested them further. I've tested Config (PID, etc) changes and live Flight Data.

  • I think getting a HAM License can be a valuable tool for many of the people that are serious about their projects.

    What level benefits r/cer's the most? Technician, General, or Extra class?
  • John I have a pair but was getting nowhere with them, GSC info coming back at 9k6 but not having any luck uploading to the APM. Tried it at 19k2 and it just worked. So i think its getting bogged down at 9k6, now to do some range tests.
  • Moderator
    @bGatti - How's that saying go... "that's how the cookie crumbles" Sure in a perfect world we'd all have the license and the regulatory folks would all be on the same page and make the higher level of restrictions where they belong, but...
  • @Brian,

    It's sweet "everyone get a license" and all; but bear in mind that these are restrictions on the sale and potential market for a product; as a consequence it is easier (less restrictive)  to make and sell guns, than it is to make and sell a walkie-talkie.



  • Moderator
    @Nathaniel / @bGatti
    I like the feedback everyone, thanks. I too thought that 4.3 did not need a license either. Actually have the book to study and get my ham license. Personally, I think that anyone serious about playing with stuff like this they should take the time to be official or at least follow the rules.
  • Moderator



    Yes you are correct that 433MHz is common as dirt, however the legal restriction on these "License free" devices limits them to 200 uv/meter (see FCC 47 CFR part15.209 here) measured at 3 meters. That works out to be about 50 microwatts to a 0 db gain antenna in the 420-450MHz band and gives a distance of only about 30 feet! I should point out my typo in my previous response I said the 420-470MHz band when I meant to say the 420-450MHz band.

    Operation at power levels above this in these frequencies requires a HAM technician class or higher license to operate. The good news is that it's easy to get a license and then you have leagl access to equipment in this band for Amateur TV (ATV) that will give you twice the range of 900MHz systems at the same power levels!




  • Moderator

    Hi Alex,

    At the moment I haven't long distance range tested. However, at 19.2K I am getting over 30 meters through walls with stock antennae bidirectional (just like xbees though, these are not full duplex. Tx and Rx take turns). I know this doesn't sound like much, but I haven't tested for distance and I'm sure that with a tracking antenna these will suit my needs. I'll have more info when my tracker is complete. At $35, you can pick up a set and test away, too  :)     You MUST disconnect the EN pin though for BiX to work.

  • Is using this system compatible with any of the autopilot systems????
  • John

    Did you get yours to work bi-directional ? also what range did you get

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