The LoRa Radio Module is a remarkable long - range, low - data - rate data radio modem based on the Sx1276 from Semtech. This low - cost sub - 1 GHz transceiver module is ideal for operations in the unlicensed ISM (Industrial Scientific Medical) and LPRD bands. With features like frequency spectrum modulation/demodulation, multi - channel operation, high bandwidth efficiency, and excellent anti - blocking performance, it easily establishes a robust and reliable wireless link.
It offers two operating modes: Standard mode and Star network mode. In Standard mode, it functions as a transparent data radio modem, communicating with the host in a preset data format without the need for encoding/decoding. In Star network mode, one module serves as the central node, while others are node modules. The communication between the central and node modules is bidirectional, but node modules can't communicate directly with each other. Note that this module doesn't support the LoRaWAN protocol, and its star network feature uses its own protocol, so it's not compatible with LoRaWAN.
We recommend using a USB to TTL Converter to set the module parameters, and the Gravity IO Expansion Shield can work directly with the LoRa modules.
**Features**:
- LoRa Frequency Spectrum
- 433/490Mhz ISM frequency band
- -137 dBm receive sensitivity
- 20 dBm Max. output power
- Serial port wake - up
- Wireless wake - up
- Star networking ability
- Supply voltage 3.4 - 5.5V
**Specification**:
- Operating voltage: 2.1 - 3.6V (battery - powered) or 4.5 - 5.5V
- Working frequency band: 433MHz
- Modulation: LoRa spread spectrum
- Output power: ≤ 20dBm
- Receiving sensitivity: -148dBm
- Emission current: ≤120mA
- Receiving current: ≤15.2mA
- Sleep current: ≤ 3.9uA
- Sleep time: Optional 2S, 4S, 6S, 8S, 10S
- Breathing time: optional 2ms, 4ms, 8ms, 16ms, 32ms, 64ms
- Wake - up time: wake up immediately
- Communication Interface: TTL serial communication
- Serial baud rate: 1200 - 57600, 9600bps (default)
- Serial port verification: 8E1, 8O1, 8N1 (optional)
- Operating temperature: -40 °C - + 80 °C
- Product Size: 34.2 * 18.4 mm / 1.35*0.72 inches
**Shipping List**:
- 433MHz LoRa Radio Module x2
- 433MHz antenna (2m SMA - Male connector) x2
Using the LoRa Radio Module is straightforward. First, if you need to set the module parameters, use a USB to TTL Converter. It's easy to connect, just follow the standard connection steps for such converters.
When choosing an operating mode, if you want simple data transfer without complex encoding, go for the Standard mode. In this mode, the module will communicate with your host device in the pre - set data format right away. If you need a network - like setup, choose the Star network mode. Remember to configure one module as the central node and others as node modules. But keep in mind that node modules can't talk directly to each other.
For power supply, make sure to provide a voltage within the specified range: 2.1 - 3.6V if using battery power or 4.5 - 5.5V for other power sources.
When it comes to maintenance, keep the module in a dry and clean environment. The operating temperature range is -40 °C to + 80 °C, so avoid exposing it to extreme temperatures. Also, check the antenna connections regularly to ensure a stable wireless link. If you face any issues with the module, double - check the serial port settings, such as the baud rate and verification options, as these can sometimes cause communication problems.
