Gravity: LoRaWAN Node Module (US915)

Q: Why does switching the DIP switch to change the communication mode not work?

After switching the communication mode while the module is powered on, you need to power cycle (reboot) the module for the change to take effect.

Q: What is the communication range of the module?

EU868 VersionStable Communication Range：1.2 km (urban)/4 km (open area)Maximum Communication Range：1.4 km (urban)/4.4 km (open area)US915 VersionStable Communication Range：1.5 km (urban)/4.5 km (open area)Maximum Communication Range：2 km (urban)/4.7 km (open area)The above test data is for reference only. Communication range is significantly affected by environmental factors (such as traffic density, weather conditions, and base station interference). The actual range should be confirmed through real-world deployment.

1. Example for LoRa Communication-Transmit-Receive Application

This article offers a detailed guide on implementing LoRa communication using ESP32 and LoRaWAN node modules, covering hardware and software setup, wiring diagrams, sample code for data transmission between nodes, and achieving successful communication results.

2. Example for LoRa Communication-One-to-Many Communication

This article provides a detailed example of implementing LoRa's 'Single Transmit, Multiple Receive' communication mode, including hardware and software setup, wiring diagrams, and sample code for successful data transmission.

3. Example for LoRa Communication-Two-to-One Communication

This article explains a two-to-one communication setup using LoRa technology with FireBeetle ESP32 and LoRaWAN modules, including preparation, wiring, coding, and results.

4. Example for LoRa Communication-Data Relay Application

The article offers a comprehensive guide on implementing data relay in LoRa communication using three nodes A, B, and C to extend the communication range beyond direct data transmission.

5. Example for LoRaWAN Communication-OTAA Network Joining

This article demonstrates how to set up and join a LoRaWAN network using the OTAA method, featuring hardware preparation with FireBeetle 2 ESP32-E and Gravity LoRaWAN Node Module. It provides comprehensive wiring diagrams and sample Arduino code for sending and receiving data within the network.

6. Example for LoRaWAN Communication-ABP Network Joining

The article offers a detailed guide on setting up LoRaWAN communication through ABP Network Joining, covering hardware and software preparations, wiring, and sample Arduino codes for effective IoT data transmission.

Reference

This reference article offers a comprehensive overview of the API library for configuring LoRaWAN settings on Arduino-compatible devices, covering functions such as setting frequency, bandwidth, data rate, and more, alongside product compatibility details.

Power Supply Voltage	DC 3.3V~5V
Communication Mode	I2C/UART
Power/Communication Interface	PH2.0-4P
Mounting Hole Diameter	3.0mm
Mounting Hole Spacing	35mm
Product Dimensions	42x62mm
Net Weight	10g

RF Chip	SX1262
Operating Frequency	915MHz
Supported Regions	North America and other regions using the US915 band
Modulation Method	LoRa modulation
Spreading Factor	7~12
Maximum Transmit Power	+22dBm
Receiver Sensitivity	-137dBm (SF=12/BW=125kHz)

Name	Full Name	Function
T/D	UART_TX/I2C_SDA	UART transmit pin (TX) / I2C data line (SDA)
R/C	UART_RX/I2C_SCL	UART receive pin (RX) / I2C clock line (SCL)
-	DGND	Digital ground, connects to the GND of the host controller
+	VCC	PPower supply input, DC 3.3V~5V (must match the host system voltage level)
PWR	Power	Red power indicator, remains on when power is supplied
ACT	Active	Green status indicator:
		1. Blinks for 1 second when transmitting a network join request.
		2. Remains on for 5 seconds when the network join is successful.
		3. Blinks for 300ms during data transmission or reception.

Gravity: LoRaWAN Node Module (US915)

Specification

Pinout