RF Modules


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  1. #1


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    The modules I used were cheap as chips and I have found them quite reliable...I would recommend them all the way
    Well,

    i've been working with them all week with NO success!

    I've tried using DEBUG/DEBUGIN, SEROUT/SERIN and HSEROUT/HSERIN.

    I have 99% confidence in my code because it works when both pics are connected to each other.

    Using these modules just doesn't work and i'm out of solutions !

  2. #2


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    Did you try Tony's code? Are you using +2.4 to +4.2 volts to power it up?

  3. #3


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    Hello danielhr77,

    thank you for your support.

    Tony's code is just a sample and not the entire code, but Yes...i did tried the the Serin/Serout lines on my code and didnt worked!

    I'm using 4,24V on both RX and TX modules to power them up.

    Have you got these modules also ?
    Were you able to use them correctly ?

  4. #4


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    I bought them but I haven't tried them yet... Next month I'm going to test them with my application...

    I don't know if 4.24 volts is fine, maximum is 4.20 according to the manual, just in case to test, add a diode to reduce it a little.

    A few questions to rule things out:

    1) Are you enabling them? (pin 5 active low)
    2) Are you using a 1k resistor between the PIC and RX (pin 3)?

    That's all right now, it's 6:30 in the morning and I'm going to bed...

  5. #5


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    Hi danielhr77,

    Followed your guide lines...

    add a diode to reduce it a little.
    Done...result is the same

    1) Are you enabling them? (pin 5 active low)
    Yes...i'm using pin5 low

    2) Are you using a 1k resistor between the PIC and RX (pin 3)?
    I wasnt...but i just tested this also and the result is the same

    Also, i programmed on both modules the channel like:
    Code:
    DEBUG $af, $20
    If you remember any other pointer for me to check i will be gratefull

    My best regards

  6. #6


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    Hmm... Do you have the correct baudrate? There's nothing else I can think of, maybe Tony has more ideas...

  7. #7


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    Yes...19200 on both

    I'm too without ideas.

    If someone has any suggestions i would be gratefull.

  8. #8
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    Quote Originally Posted by ruijc View Post
    Also, i programmed on both modules the channel like:
    Code:
    DEBUG $af, $20
    Did you Pull pin 8 low before sending data and return it to High after? And did the module respond the way the Almost_A_Data sheet said ?
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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  9. #9


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    Hi Joe S. and thanks for your help,

    Yes i did...I have a led connected to each one. The modules ( after sending the channel number ) light up the leds for a second confirming the channel change.

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