Hi,
I have purchase both 315 and 433 RF module pair for my project. I using the computer parallel port to control the RC car through the RF module. Let me summarize the project description here:
At controller circuit board, i have 315 transmitter module and 433 receiver module.
At RC car circuit board, i have 315 receiver module and 433 transmitter module.
This design is to send data from controller side to RC car and also feedback signal from RC car to controller side.
The problem i have facing is when i connect antenna for both side of RF modules, the transmission signal for 433 module will lost but if all the antenna is unplug, the transmission signal is fine for both RF module pair. But without antenna, will affect the RF transmission range, right? anyone know the rootcause and the solution?
please help, very urgent.
tq