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rf interfacing using avr atmega8

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rishiisme

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Hi everybody i am new to rf module interfacing (using AVR) and am not being able to implement it,Can anyone please suggest some solutions or guide me on how to make it work.

Circuit info
avr tx to transmitter module(433mhz)
receiver module to rx pin

i dont know what changes to make and really need a lot of help here, been stuck for days......
 

rishiisme

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is it really necessary to use external crystals on xtal or can we use the internal ??? also is it required to invert the tx and rx pins
 

rishiisme

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i have written my own coded transmission protocol (manchester) it is working perfectly with wires. i made sure there are no continues 1s or 0s. can i, now ,send the output directly into the tx module's data pin??
 

rishiisme

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connections r fine but still not working receiving 0x00 all the time. baud rate is 1200 bps (working for wired though). am i making any conceptual mistakes???
 

rishiisme

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the thing is i am not using UART i made my own protocol which works perfectly with wires
Basic idea - baudrate either 2400
1)idle bit =0
2)start bit 1
3)manchester coding
connections
MCU1 MCU2
pin D3 -> rf-tx -> antenna antenna->rf-rx->pin D3(pulled down input mode)
it works for wired this way using the pull down resistor
 

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