IoT is becoming more and more popular these days, Long Range as a significant member of IoT, has many applications in the smart city, smart building, and industry. For some terminal devices like Arduino and Raspberry Pi with sensors that transmit data via RS485 interface, this RS485 to LoraWAN converter can help these devices to communicate by Long Range.
The RS485 to LoraWAN converter is embedded by the SX1276 Long Range chip. This converter can convert RS485 signals into Long Range wireless signals and transmit them to the Long Range gateway. For data uplink: RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to the user-define rule to get the final payload to upload to the LoraWAN server. For data downlink: RS485-LN runs in LoRaWAN Class C. When there are downlink commands from the LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.
Highlighted Features
- STM32L072CZT6 MCU for master control
- SX1276 Long Range wireless chip
- LoraWAN Class A & Class C protocol
- Flexible rules to connect different RS485 devices
- AT commands to change parameters
Specifications
Hardware System:
- STM32L072CZT6 MCU
- SX1276 Wireless Chip
- Power Consumption (exclude RS485 device):
- Idle: 32mA@12v
- 20dB Transmit: 65mA@12v
Interface for Model:
- RS485
- Power Input 7~ 24V DC.
Long Range 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.
- 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.
- +14 dBm high-efficiency PA.
- FSK, GFSK, MSK, GMSK, and OOK modulation.
- Built-in bit synchronizer for clock recovery.
- Preamble detection.
- 127 dB Dynamic Range RSSI.
- Packet engine up to 256 bytes with CRC.
- Automatic RF Sense and CAD with ultra-fast AFC.