Im trying to experiment on wireless data transmission in the Arduino Yun using a pair of 315MHz RF Transmitter and Receiver. But since I’m a beginner, I tried first to test the RF transmitter and receiver to control two motors.
I did a very simple set-up. At the transmitter side:
two dpdt switches → encoder (HT12E) → transmitter
At the receiver side:
receiver → decoder (HT12D) → motor driver (L293D)
I got the set-up to work successfully. However, I’m limited to about 6 to 12 inches of range only. Beyond this distance, there is no more response or sometimes erratic response from the receiver. I tried to install an antenna on the transmitter but it just did not work. I don’t know if i got the antenna connection correct.
On the receiver, there is no label for antenna connection and i could not find documentation on the receiver that could indicate proper connection.
Can anyone please help. I have attached the pictures of the actual setup and transmitter and receiver.