Many users often use different wireless modules when they use wireless modules, such as short transmission distances and mismatched functions. Then, my heart will think if we are cheating to the manufacturer? In fact, when we use the wireless module, we often do not understand the function of the wireless module, so there will be different problems when using.
Before using the wireless module, we should read the product parameters on the product specification in detail, which will greatly reduce the problems in the process of using the product. However, not everyone can understand each product parameter map, so, thinking for wireless to organize a basic knowledge of the wireless module for the majority of users, let everyone use the product, a little help, so that everyone is better Use a wireless module.
Interface: The main function of the interface is to enable communication between the wireless module and other devices. Commonly used interfaces are divided into (TTL, UART, USB, RS232, RS485, etc.)
2. Working frequency: The frequency band of signal wave communication between wireless modules. When communication is impossible, check whether the frequency bands are consistent. Commonly used frequency bands are (433, 470, 868, 915, etc.)
3. Power (Qutput power): The power parameter has two units, mW and dBM, such as: 100mWH and +20dBm, meaning the same, but the unit is different. The higher the power of the wireless module, the farther the transmission distance is.
4. Sensitivity: The unit of sensitivity is dBm. The higher the sensitivity of the wireless module, the farther the transmission distance is.
5. Voltage (V): The operating voltage range of the wireless module, there is a problem in the working process of the wireless module, and there is often a problem in the power supply.
6. Standby current: The current when the wireless module is not working.
7. Receiving current: The current when the wireless module receives the signal.
8. Transmitting current: The current when the wireless module sends a signal.
9. Transceiver Rate (Speed): The higher the transceiver rate, the faster the wireless module will transmit.
When purchasing a wireless module, in addition to referring to the parameters of the module, we must also consider the surrounding environment, the location of the antenna, etc., in order to determine which wireless module is most suitable for use. Today's sharing is over here, I hope that the basic knowledge of wireless modules for wireless finishing can help everyone.