sumeshm.pnr
New Member
hello,
I've built a door opening system. It has interface with the system through serial port of PC.
Now i want to make it wireless. what is my idea is the output from serial port, after converting to TTL logic, is directly transmitted using RF433MHz transmitter.
On RXR side i have connected data pin of RXR directly to 89c51 P3.0(uart). But it is not working..
Is there any problem in direct connection?? what actually the problem is RXR data pin is always high(after it is connected to 8051).
I think it is because while RF RXR data pin is low, it can't pull-down the P3.0 pin to low. I have checked the Txr and RxR, they are working properly.
Is there any problem in this direct connection??. or do i need to do any adjustment in my connection...
please help me,
thanks very much in advance...
I've built a door opening system. It has interface with the system through serial port of PC.
Now i want to make it wireless. what is my idea is the output from serial port, after converting to TTL logic, is directly transmitted using RF433MHz transmitter.
On RXR side i have connected data pin of RXR directly to 89c51 P3.0(uart). But it is not working..
Is there any problem in direct connection?? what actually the problem is RXR data pin is always high(after it is connected to 8051).
I think it is because while RF RXR data pin is low, it can't pull-down the P3.0 pin to low. I have checked the Txr and RxR, they are working properly.
Is there any problem in this direct connection??. or do i need to do any adjustment in my connection...
please help me,
thanks very much in advance...
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