problem with sending data using RF module

[mister_e]

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.

[mackrackit]

877A
Well that is what happens when you do not look at the attachments.

But on the transmitter part I still do not see ADCON1 = 7.
And on the receiver part I do not see CMCON = 7.

And in the schematic pin 3 of the LCD goes straight to ground. No pot for contrast. I know on some modules this works, but are you sure it is this time.

not much help.

[mister_e]

woopseee ... just saw that missing ADCON1
but in theory... analog comparator are already disabled at POR...

[dhouston]

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

[Archangel]

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.

 SEROUT TransmitterPIN,T2400,[Synk,Synk,9,Counter]

I would try adding a string to the serout routine for test purposes only, something like

SEROUT TransmitterPIN,T2400,$FE,1,["1 2 3 "]

[mister_e]

Joe, seems you missed the underlined section...

Main:
HIGH LEDPin
PAUSE 100
LOW LEDPin
PAUSE 100

SEROUT TransmitterPIN,T9600,[Synk,Synk,Synk,Synk,Synk,Synk,9,Counter]

HIGH LEDPin
PAUSE 100
LOW LEDPin
PAUSE 100

Counter = Counter + 1
PAUSE 600
GOTO Main
END

[mackrackit]

Maybe Joe has bifocals like me

[rano_zen06]

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

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.

 SEROUT TransmitterPIN,T2400,[Synk,Synk,9,Counter]

I would try adding a string to the serout routine for test purposes only, something like

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.

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??