Select appropriate wireless data transmission module

Wireless data transmission module, from itsname, we can know that it is a kind of module to transmit data. The form of transmission can be one-to-one, one to many, or other forms. Let's take a look at the common data transmission modules.

Before understanding the type of data transmission module, first understand the components of the data transmission module itself. The data transmission module is generally controlled by the maincontroller and the wireless chip. Some high-power modules may have additional power amplification modules. The main controller can be various MCU, such as8-bit MCU and 32-bit MCU. Wireless chips are common chips. For a certain data transmission module, wireless chip is very important, because the performance of wireless chip directly affects the performance of data transmission module,such as power consumption, transmission distance and anti-interference performance. The commonly used wireless chips are Lora type and FSK type. Lora chips are characterized by strong anti-interference ability, long transmission distance, high reception lead, but slow transmission rate; FSK chips are characterized by fast speed, but poor anti-interference performance, and short transmission distance. The above is just a general impression. Let's take alook at the actual performance comparison of the data transmission modules ofthe two actual products.

Parameter type Module  type	LoRa610	SV610
Emission current (typical)	130 mA	95mA
Sleep Current(Typical)	<40mA	≤5mA
Modulation rate (maximum)	17353bps	115.2Kbps
Transmit power (maximum)	+20dBm	+20dBm
Receiving sensitivity	-139dBm（@91bps）	-121 dBm（@1.2Kbps）
transmission distance	5000 m @low data rate	1400 m@1.2K low data rate

Note: the transmission distance of both modules is measured in the open area. The actual transmission distance will vary depending on the environment in which the wireless module is placed.

It can be seen from the table that the data transmission module based on Lora chip has obvious advantages in transmission distance and reception sensitivity, while the module based on FSK chip has advantages in transmission rate. After understanding the characteristics of the two types of wireless modules, users can easily select the appropriate wireless module. besides. Some Lora modules can also be used as LoRaWan, which provides a new choice for users who need to use networking.

The above is a summary of the selection of the appropriate wireless module, I hope it can help you.