In today's era of information explosion, wireless communication technology is everywhere and penetrates every corner of our daily life. WiFi, Bluetooth, 4G/5G, etc., these familiar names are commonly used communication technologies every day. But behind this, there is another technology that may not be well known, but is equally important-Sub-G communication technology. It plays a role in our lives silently and adds a lot of convenience to our lives.

What is Sub-Ghz

Sub-GHz wireless communication is a wireless communication technology that works in the frequency band below 1GHz. Compared with traditional 2.4GHz wireless communication technology, Sub-GHz wireless communication has a longer transmission distance, stronger penetration ability and lower power consumption. This is mainly due to its low frequency band characteristics. In the low frequency band, radio waves can better penetrate buildings, obstacles, etc., thereby achieving a longer transmission distance. At the same time, the radio waves in the low frequency band attenuate slowly, and can maintain a more stable signal quality.

In addition, Sub-GHz wireless communication also has the following advantages:

Strong anti-interference ability: Due to working in a lower frequency band, Sub-GHz wireless communication is less interfered with and can better ensure the stability of communication.

High security: Sub-GHz wireless communication adopts spread spectrum communication technology, which can effectively prevent the signal from being intercepted and cracked, and ensure the security of communication.

Low power consumption: Sub-GHz wireless communication adopts low power consumption design, which can reduce the power consumption of equipment while ensuring the quality of communication.

LoRa and FSK are the two most used technologies in Sub-Ghz wireless communication technology. LoRa technology is a long-distance wireless communication technology based on spread spectrum modulation. It combines digital signal processing and forward error correction coding technology. The main advantages are its long-distance transmission distance, low power consumption, high interference and reliability. FSK technology is a modulation method based on frequency offset, which represents different data bits by changing the frequency of the signal. FSK technology has the advantages of fast data transmission speed and strong anti-interference ability, and is suitable for short-distance and high-speed data transmission scenarios.


Although Sub-G communication technology may not be as conspicuous as other mainstream technologies in the public eye, it plays a pivotal role in the field of Internet of Things. From smart home sensors to industrial automation control equipment to telemedicine monitoring instruments, Sub-G communication technology is silently providing stable and reliable communication support for these devices. In the field of Sub-GHz wireless communication, E22 and E32 wireless communication modules are two highly anticipated products. They use different technical solutions, but both have achieved remarkable results in the field of Sub-GHz wireless communication.

The E22 wireless communication module is designed based on the SX1262 RF chip and operates in the 400/900MHz frequency band. It uses a new generation of LoRa spread spectrum technology. Compared with the traditional SX1278 solution, it has a longer communication distance, faster speed and lower power consumption. At the same time, the E22 wireless communication module also supports multi-level relay networking functions, which is suitable for ultra-long-distance or complex environment networking communications.

The E32 series uses a new generation of LoRa spread spectrum technology. LoRa™ direct sequence spread spectrum technology has the advantages of longer communication distance and strong anti-interference ability. At the same time, the E32 wireless communication module also has data encryption and compression functions, which can ensure the security and reliability of data during transmission.


With the continuous development of applications such as the Internet of Things and smart homes, the demand for wireless communication technology is also growing. Sub-GHz wireless communication technology, with its unique advantages, is gradually becoming one of the key technologies in these applications. As outstanding representatives of Sub-GHz technology, E22 and E32 wireless communication modules will play a more important role in the future wireless communication field. Let us look forward to more surprises they will bring in the future!