Gravity LoRaWAN Node Module EU868

The Gravity LoRaWAN module from DFRobot brings LoRa radio in the EU868 band to Arduino, ESP32 or micro:bit. The SX1262 radio chip and the complete protocol stack sit on the module, the board controls it via I2C or UART with simple commands. It supports LoRa directly from module to module (P2P) as well as LoRaWAN class A and C with joining via OTAA or ABP, for example to The Things Network, ChirpStack or an own gateway. With the antenna on the board, DFRobot states about 1.2 km range in the city and 4 km in open terrain.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces
• FireBeetle 2 ESP32-E IoT Development Board 16M Flash 2M PSRAM
• LoRaWAN Indoor Gateway 868MHz SIoT Server

Features:

• LoRa P2P: one to one, one to many, many to one and as relay
• LoRaWAN class A and C, joining via OTAA or ABP
• SX1262 radio chip, transmit power up to +16 dBm, sensitivity down to -137 dBm
• I2C or UART via DIP switch (I2C by default), restart after switching
• Supply 3.3 V to 5 V, according to the wiki matching the logic level of the connected board
• PWR LED for power, ACT LED for joining and data traffic
• Arduino IDE, Mind+ and MakeCode
• Antenna on the board

Application Examples:

• Soil moisture and irrigation in gardens and agriculture
• Weather stations and environmental measurements at remote sites
• Battery-powered sensor nodes
• Teaching about radio networks and IoT

Documentation:

• Wiki DFRobot DFR1115-868
• Schematic (PDF)
• Dimension drawing (PDF)
• Arduino library DFRobot_LWNode (GitHub)
• Example joining via OTAA with FireBeetle 2 ESP32-E (wiki)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR1115-868
• Radio chip: Semtech SX1262
• Frequency: 868 MHz, EU868 band
• Modulation: LoRa, spreading factor 7 to 12, bandwidth 125 kHz
• Transmit power: max. +16 dBm
• Sensitivity: -137 dBm (SF12, 125 kHz)
• Modes: LoRa P2P, LoRaWAN class A and C (OTAA, ABP)
• Interface: I2C or UART via Gravity PH2.0-4P
• Pins: T/D (TX or SDA), R/C (RX or SCL), −, +
• Supply: 3.3 V to 5 V DC
• Mounting holes: 3.0 mm, spacing 35 mm
• Dimensions: 62 × 42 × 8 mm
• Weight: 10 g

Scope of Delivery:

• 1× Gravity LoRaWAN node module EU868
• 1× Gravity cable 4-pin PH2.0 to Dupont female