The difference between 315 MHz module, 433 MHz module, 2.4 GHz module

The wireless modules developed by many domestic manufacturers are mainly concentrated on the three frequency points of 315 MHz, 433 MHz, and 2.4 GHz. These three frequency points have their own advantages and disadvantages. The following article deals with 315 MHz, 433 MHz, and 2.4 GHz wireless modules. Make a comparison and see where they are different and what are the differences.

The difference between 315 MHz module, 433 MHz module, 2.4 GHz module

The difference between the 315MHz, 433MHz, and 2.4GHz wireless modules is the frequency band. The frequency of the 315MHz wireless module is 315MHz, the frequency of the 433 MHz wireless module is 413 MHz, and the frequency of the 2.4 GHz wireless module is 2400MHz.

Comparison of 315 MHz module and 433 MHz module

The wavelength of 315 MHz is longer than that of 433 MHz, and the antenna is longer than that of 433 MHz. The directivity is not as strong as that of 433 MHz. When it has good winding properties, the penetration ability of 315 MHz is weaker than that of 433 MHz.

Comparison of 433 MHz module and 2.4 GHz module

The 2.4 GHz module model has a short transmission distance (usually 10-30 meters, and a reliable communication distance of 10 meters). The transmission process attenuation is large, the signal penetration and diffraction ability is weak, and the signal is easily blocked by objects.

The 433 MHz wireless module has strong signal, long transmission distance, strong penetration and diffraction ability, and reduced attenuation during transmission.

2.4 GHz and 433 MHz are the domestic license-free ISM (industrial, scientific, medical) open frequency bands, and there is no need to apply for authorization from the local radio management. Generally, the 433 MHz wireless module is commonly used in China.

The above is the difference between 315 MHz, 433 MHz, and 2.4 GHz wireless modules. In different practical application environments, select the wireless module suitable for the frequency band, so as to ensure that the product exerts the greatest advantage.