Low-cost LoRa Module

Introduction

This is low-cost LoRa gateway module which is powered by RFM96-low power long range transceiver module. The gateway can receive from any LoRa device and is designed to be fully customizable for a targeted application.Various applications are considered: water quality monitoring, cattle rustling, logistics and goods transportation.

This LoRa gateway could be qualified as "single connection" as it uses the SX1272, much like an end-device would do. However, in order to increase LoRa transmission robustness we improve the LoRa transmission with CSMA features (or so-called Listen Before Talk) and add Quality of Service guarantees with regards to radio time limitations.

Feature

• LoRa Modem.
• 168 dB maximum link budget.
• +20 dBm - 100 mW constant RF output vs. V supply.
• +14 dBm high efficiency PA.
• Programmable bit rate up to 300 kbps.
• High sensitivity: down to -148 dBm.
• Bullet-proof front end: IIP3 = -12.5 dBm.
• Excellent blocking immunity.
• Low RX current of 10.3 mA, 200 nA register retention.
• Fully integrated synthesizer with a resolution of 61 Hz.
• FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
• Built-in bit synchronizer for clock recovery.
• Preamble detection.
• 127 dB Dynamic Range RSSI.
• Automatic RF Sense and CAD with ultra-fast AFC.
• Packet engine up to 256 bytes with CRC.
• Built-in temperature sensor and low battery indicator.