User Manual

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RS485 to LoRaWAN Converter User Manual 5 / 29
1.2 Specifications
Hardware System:
 STM32L072CZT6 MCU
 SX1276/78 Wireless Chip
 Power Consumption (exclude RS485 device):
 Idle: 32mA@12v
 20dB Transmit: 65mA@12v
Interface for Model:
 RS485
 Power Input 7~ 24V DC.
LoRa Spec:
 Frequency Range:
 Band 1 (HF): 862 ~ 1020 Mhz
 Band 2 (LF): 410 ~ 528 Mhz
 168 dB maximum link budget.
 +20 dBm - 100 mW constant RF output vs.
 +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.
1.3 Features
 LoRaWAN Class A & Class C protocol (default Class C)
 Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864
 AT Commands to change parameters
 Remote configure parameters via LoRa Downlink
 Firmware upgradable via program port
 Support multiply RS485 devices by flexible rules
 Support Modbus protocol