LoRa SX1278 Module
The LoRa SX1278 module is a high-sensitivity component with long-range spectrum communication capabilities. Its heart is the LoRa tech that uses patented modulation.
What Is the LoRa SX1278?
The LoRa SX1278 is a chip designed by Semtech, which is capable of broad-spectrum connectivity. It has a high sensitivity of -148 dBm. Meaning, its noise levels are extremely low.
This makes the chip ideal for modules used in building automated and Internet of Things (IoT) kits. Lower noise levels suggest that there is minimal interference that can result in poor communication between two devices, especially if those are in long distances. Moreover, the module equipped with this chip can run without consuming a lot of power.
LoRa is also designed by Semtech, which uses a proprietary and patented modulation technology different from frequency modulation. This tech is referred to as CSS or chirp spread-spectrum. Chirp is the term used for the gradual fluctuation of carrier wave’s frequency over a period of time. Before the chip delivers a message, it first checks if the band is free.
The transmitter sends the signal while the reverse chirp signal caught by the LoRa receiver will then inform the transmitter of the status of the band. If it’s free, the chirp can begin with the transmission.
Further Improved by CSS
CSS further strengthens the chip’s ability to cancel noise and interference. It is so robust it can resist Doppler effect or the fluctuations of waves in relation to the position or location of the receiver. The signal remains stable despite the distance.
The chip and modules that come with it can also tap on unlicensed frequencies, which could further improve communication because of the available options.
Currently, LoRa SX1278 is the preferred chip of popular modules like XL1278-SMT, which is a front-end transceiver module. XL1278-SMT has a lower range and data rate than RFIC SX1278.
There’s also the LoRa 433MHz module by Ai-Thinker. Incidentally, this is the company that first launched ESP-01 modules. These then became the foundations for other well-known modules like ESP8266 and ESP32.
One can also interface the LoRa SX1278 chip with the Arduino module. Arduino has been an industry favorite because it is open-source and friendly to beginners. Its firmware and software are easy to customize.
Where Can You Use LoRa SX1278 Modules?
Modules that run on LoRa SX1278 are definitely ideal for projects that revolve around automation and IoT. Often, the communication between devices will need to be long-range. They may also be in different places with many possible barriers. The robust frequency of LoRa chip can bypass these limitations. Even better, it does so with low power.
To be more specific, LoRa modules are great for:
- Whole-home and building automation
- Automation of meter readings
- Agricultural projects that include automated irrigation
- Monitoring and control of industrial equipment
- Security systems that use wireless technology
Features of LoRa SX1278 Modules
Note that LoRa modules may have different features, but in general, they often come with the following:
- LoRa SX1278 chip with patented chirp modulation technology
- Very low noise level at -148 dBm
- Programmable data rate that can reach up to 300kbps
- Preamble detection
- Runs on voltage between 1.8 and 3V
- Built-in temperature sensor and clock synchronizer
- Automatic detection of radiofrequency signals
- Spring antenna
Published: March 12, 2021