DFRobot
DFRobot Gravity LoRaWAN Node Module US915 (SX1262)
· MPN: DFR1115-915
This compact wireless node module is designed for long-distance, low-power outdoor IoT projects. Built around the Semtech SX1262 and LoRa modulation, it oper...
This compact wireless node module is designed for long-distance, low-power outdoor IoT projects. Built around the Semtech SX1262 and LoRa modulation, it operates on the 915 MHz US915 band and supports both direct LoRa communication and LoRaWAN networking.
It can be used for point-to-point links or connected into a LoRaWAN network through gateways and platforms such as TTN or ChirpStack. The module is suited to wide-area sensing where Wi-Fi or 4G may be unavailable or too power-hungry, with quoted performance of up to 1.5 km in urban settings and up to 4.5 km in open environments.
Integration is kept straightforward with a built-in LoRa/LoRaWAN protocol stack, UART and I2C interfaces, and support for Arduino IDE, Mind+ and MakeCode graphical programming. It is compatible with popular controllers including micro:bit, Arduino and ESP32, and comes with a PH2.0-4P connection cable.
Features:
- Dual communication modes: Supports both LoRa point-to-point communication and LoRaWAN networking.
- LoRa point-to-point: Supports one-to-one, one-to-many, many-to-one and bridge transmission.
- LoRaWAN classes: Supports LoRaWAN Class A and Class C.
- Gateway integration: Can integrate with cloud platforms like TTN or ChirpStack via LoRaWAN gateways.
- Kilometre-range wireless: Up to 1.5 km in urban settings.
- Open-area range: Up to 4.5 km in open environments.
- Built-in protocol stack: Includes LoRa/LoRaWAN protocol support without low-level development.
- Arduino IDE support: Suitable for Arduino-based development.
- Mind+ support: Supports Mind+ programming.
- MakeCode support: Supports MakeCode graphical programming.
- Controller compatibility: Compatible with micro:bit, Arduino and ESP32.
- Included cable: PH2.0-4P connection cable included.
Specifications:
- Operating Voltage: 3.3V to 5V DC
- Communication Interfaces: UART and I2C
- Connector Type: PH2.0-4P
- Logic Level Compatibility: 3.3V / 5V
- Board Dimensions: 42 × 62 mm (1.65 × 2.44 in)
- Mounting Hole Diameter: 3.0 mm (0.12 in)
- Mounting Hole Spacing: 35 mm (1.38 in)
- Net Weight: 10 g (0.35 oz)
- RF Chip: Semtech SX1262
- Operating Frequency: 915 MHz
- Supported Regions: North America and other regions using the US915 frequency band
- Modulation: LoRa
- Spreading Factor: SF7 to SF12
- Max Transmit Power: +22 dBm
- Receiver Sensitivity: -137 dBm (SF12 @ 125 kHz bandwidth)
Typical applications include farm condition monitoring, greenhouse temperature and humidity sensing, beehive monitoring, ecological area data collection and LoRaWAN-enabled weather stations.
Jargon buster
Plain-language definitions for the technical terms used above.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- LoRa
- LoRa is a long-range, low-power radio technology often used for telemetry and remote sensors. It matters here because the connector and pinout are compatible with some LoRa telemetry products, even though this module uses Bluetooth instead.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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