Bluetooth wireless module has been widely used in life, because Bluetooth wireless module is not only low cost, short construction cycle, adaptable and scalable. Of course, with the wide range of applications, there will be a lot of problems, such as Bluetooth wireless module communication when the distance is short, signal transmission is good or bad, affecting the use of the whole product. The following are the specific reasons and solutions for physical in the cloud.

First, the Bluetooth wireless module communication distance in time, good and bad

The main factors affecting the Bluetooth wireless module itself communication distance:

Frequency band:The lower the frequency, the farther the transmission range, but the lower the data rate supported, you need to choose your own.

Transmit power: the higher the transmit power, the signal transmission to the distance, the farther the effective transmission range; but the higher the power consumption.

Receiving sensitivity: The sensitivity of the Bluetooth device receiver must be at least -70 dBm to -82 dBm; the more this is, the farther the distance is transmitted, such as the sensitivity of the MS50SFA1 Bluetooth module for objects in the cloud is -96dBm.

Good or bad: Check whether the surrounding environment has the same frequency interference, whether the Bluetooth wireless module has metal shielding. Check whether the power supply is good and whether the power ripple factor is small. Wireless communication products need higher power supply and smaller ripple. For this reason, most users communicate abnormally.

Second, receiving data in communication is wrong

First, check whether the module level interface is consistent with the connected device. Second, check whether the module serial interface parameter settings match the connected device. Finally, see if the module data interface is bad.

Third, the two wireless modules can not communicate with each other

First, through the status of the indicator, check whether the interface, power supply connection is wrong, whether the data line is connected.

Secondly, check whether the frequency, channel and air rate of each module are set up, which can be viewed by PC configuration software. Finally, if the above steps still do not solve the problem, replace the transmitter or receiver module to see if the module is damaged. However, it is unlikely that the Bluetooth wireless module is damaged and the product will be tested several times before it leaves the factory.

Finally, after reading this, you should have some idea about the communication range of Bluetooth wireless modules as well as when they are good or bad. Here it is also recommended that users try to minimize the air baud rate, because the air baud rate is too high will affect the communication transmission distance.

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