Presentation of the LG02 router
published: 24 August 2021 / updated 24 August 2021
Introduction
LG02 has rich internet connection methods such as WiFi interface, Ethernet port and Cellular (Optional). These Interfaces provide flexible methods for users to connect their sensor networks to Internet.
LG02 can be used to provide a low cost IoT wireless solution to support 50~300 sensor nodes.
LG02 can support multiply working mode such as: LoRa repeater mode, MQTT mode, TCP/IP Client mode, TCP/IP Server mode to fit different requirement for IoT connection.
Specifications
Hardware System
Linux Part:
- 400Mhz ar9331 processor
- 64MB RAM
- 16MB Flash
Interface:
- 10M/100M RJ45 Ports x 2
- WiFi : 802.11 b/g/n
- LoRa Wireless
- Power Input: 12V DC
- USB 2.0 host connector x 1
- USB 2.0 host internal interface x 1
- 2 x LoRa Interfaces
The DRAGINO LG02 router pre-built and studied here does not have a GSM 3G / 4G interface (ref OLG02).
The model shown here was bought for around €120 on AMAZON (price for France).
WiFi Spec:
- IEEE 802.11 b/g/n
- Frequency Band: 2.4 ~ 2.462GHz
- Tx power:
- 11n tx power : mcs7/15: 11db mcs0 : 17db
- 11b tx power: 18db
- 11g 54M tx power: 12db
- 11g 6M tx power: 18db
- Wifi Sensitivity
- 11g 54M : -71dbm
- 11n 20M : -67dbm
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.
- Built-in temperature sensor and low battery indicator.
Cellular 4G LTE (optional):
- Quectel EC25 LTE module
- Micro SIM Slot
- Internal 4G Antenna + External 4G Sticker Antenna.
- Up to 150Mbps downlink and 50Mbps uplink data rates
- Worldwide LTE,UMTS/HSPA+ and GSM/GPRS/EDGE coverage
- MIMO technology meets demands for data rate and link reliability in modem wireless communication systems
Features
- Open Source OpenWrt LEDE system
- Low power consumption
- Firmware upgrade via Web
- Software upgradable via network
- Flexible protocol to connect to IoT servers
- Auto-Provisioning
- Built-in web server
- Managed by Web GUI, SSH via LAN or WiFi
- Internet connection via LAN, WiFi, 3G or 4G
- Failsafe design provides robustly system
- 2 x SX1276/SX1278 LoRa modules
- Full–duplex LoRa transceiver
- Two receive channels, and one transmit channel
- Limited support in LoRaWAN/ Support Private LoRa protocol
- Support upto 300 nodes
- LoRa band available at 433/868/915/920 Mhz
- Max range in LoRa: 5~10 km. Density Area:>500m
System Structure
