If the Bluetooth range is too short, you can:
1. The gain of the antenna regulated wireless communication system is equal to the sum of the transmitting power of the wireless module and the antenna gain, so the antenna gain has a great relationship with the transmitting distance of the wireless module. When the module is matched with the antenna, the higher the gain of the antenna, the longer the transmission distance of the wireless Bluetooth module.
2. The transmission path of wireless data communication Wireless module is realized through the transmission of wireless electromagnetic waves in the air, so the blocking of obstacles has a great impact on wireless transmission, especially the blocking of metal objects, not only blocks the wireless transmission signal, but also absorbs and reflects the electromagnetic wave signal, reducing the radiation efficiency.
Therefore, the biggest obstacle to wireless transmission is actually metal, houses, forests, grass, sea level and other objects that can play a shielding role.
3. Adjustment of transmitter and receiver.