problem with sending data using RF module


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  1. #13
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    Mar 2008
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    Quote Originally Posted by dhouston View Post
    As drawn, both Reset switches are shorting +5V to GND.

    Can you provide details for your transmitter and receiver module
    manufactiurer/model/pinouts?

    See http://davehouston.org/RFTipsTricks.htm
    Sorry for late reply guys,got a lot of homeworks to do. ; )
    The fact is I have less information about my RF module.I just buy it from the nearest electronic store.Since I live here in Chiang Mai ,Thailand...It's hard for me to find a good types of RF module such as PArallax or TWS/RWS 434...For your reference I attach the picture of the RF modules .The link below may help. It was the datasheet of receiver chip used in my RF module.
    http://www.himark.com.tw/images/pdf/...df/RX3310A.zip


    Quote Originally Posted by Joe S. View Post
    Hello rano_zen06,
    Looking at your code . . . not however, trying it out . . . Is this all of it? I do not see anything to cause the transmitter to send data from the keypad, unless I have become legally blind . . . or stupid . . . that is why I asked is this all of it. As I said . . I see empty variables in the serout routine.
    Code:
     SEROUT TransmitterPIN,T2400,[Synk,Synk,9,Counter]
    I would try adding a string to the serout routine for test purposes only, something like
    Code:
    SEROUT TransmitterPIN,T2400,$FE,1,["1 2 3 "]
    Actually what I want to do right now is display the counting numbers on my LCD at receiver board and it's nothing to do with my keypad.I just want to try send a data using my RF module first before I proceed with sending the data from my scanning keypad because I need to know if my RF module able to do it's job or not.

    Quote Originally Posted by mister_e View Post
    See pics in POST#1. 16F877A, and seems ADCON1 and CMCON settings are right.

    Once the wire connection will work, i may suspect 2 other things.
    1)open collector output of the receiver
    2)use inverted mode instead. so the pin will idle low.
    I already connect the Transmitter and the receiver pin directly but it's not work.my LCD only shows a bunch of black box .Maybe the major problem is from my coding or hardware??
    Any other suggestion mister_e ? and how to use inverted mode??
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