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why my rf433 only can transmit within a short distance like a length of ruler?
rf 433 problem with arduino
- Thread starter kuannygohcheetatt
- Start date
How big an antenna on the transmitter?
How big an antenna on the receiver?
To get any reasonable range, both of the antennas must be a full-length half-wave center-fed dipole at 433megHz.
dipole length = 3e10/(2.05*433e6) = 27.7cm
Using full size dipoles, I get a range of >200m using the cheap Ebay 315MHz modules.
How big an antenna on the receiver?
To get any reasonable range, both of the antennas must be a full-length half-wave center-fed dipole at 433megHz.
dipole length = 3e10/(2.05*433e6) = 27.7cm
Using full size dipoles, I get a range of >200m using the cheap Ebay 315MHz modules.
