The Meizo R68 series industrial 4G LTE M2M router is used to provide fast and stable internet service in PLCs and other M2M applications. The router CPU is using Broadcom chipset, integrated with industrial grade 4G modem, offering WAN, LAN, SIM, VPN, VRRP, WiFi, and Serial port services, product line supporting the following radio access technologies: LTE, HSPA+, HSPA, UMTS, EVDO, EDGE, CDMA2000, GPRS . By owning automatic connection monitoring and heartbeat detection, make sure the router to be always online.
The 4G rugged router is using Industrial Grade equipment design standards, passed CE, FCC and EMC test, stable and reliable. Multiple VPN encryption protocols as L2TP, IPSec, PPTP and GRE are owned, making it ideal solution for applications in which high data bandwidth and strong stability is required.
Main Features |
Hardware Specifications |
Software Functions |
● Support public and private APN network |
CPU |
VPN |
Model |
Frequency & Band |
Bandwidth(UL/DL) |
Consumption |
WiFi (-W) |
Serial(-S) |
Power |
R68A |
● FDD-LTE: 2100MHz(B1),1900MHz(B2), 1800MHz(B3), AWS(B4), 850MHz(B5), 2600MHz(B7),700MHz(B12),700MHz(B13), 800MHz(B20), 1900MHz(B25) , 850MHz(B26), 700MHz(B29), 2300MHz(B30), |
FDD-LTE:50Mbps/300Mbps |
Work:0.46A@12V DC |
802.11n 300Mbps Option |
RS232/RS485 Option |
US/EU standard |
R68C |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 900MHz(B8) |
FDD-LTE:50Mbps/150Mbps |
Work:0.41A@12V DC |
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R68E (Europe & Asia network) |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 850MHz(B5), 2600MHz(B7), 900MHz(B8), 800MHz(B20) |
FDD-LTE:50Mbps/150Mbps |
Work:0.41A@12V DC |
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R68J |
● FDD-LTE: 2100MHz(B1), 1800MHz(B3), 850MHz(B5), 2600MHz(B7), 900MHz(B8), 800MHz(B18), 800MHz(B19), 1500MHz(B21), 700MHz(B28), |
FDD-LTE:50Mbps/300Mbps |
Work:0.46A@12V DC |
What is LoRa wireless?
This page covers LoRa wireless technology. This page of RF Wireless World covers LoRa wirelessbasics used in M2M and IoT(Internet of Things).
The LoRa Wireless tutorial covers following sub topics:
Main page LoRa tutorial LoRa Frequency Bands LoRa protocol stack LoRa MAC layer LoRaWAN classes LoRa features LoRa Transceiver modul
LoRa stands for Long Range Radio. It is the wireless technology mainly targetted for M2M and IoT networks. This technology will enable public or multi tenant networks to connect multiple applications running in the same network. This LoRa technology will fulfill to develop smart city with the help of LoRa sensors and automated products/applications.
LoRa Alliance formed to standardize LPWAN (Low Power Wide Area Network) for M2M/IoT. The prospective members in this alliance are Actility, Cisco, Bouygues Telecom, Proximus, SingTel, Semtech, Swisscom, IBM, SingTel, KPN etc. The LoRa Alliance will drive global success of LoRa Protocol i.e. LORA WAN.
LoRa wireless technology basics in M2M and IoT
Following table summarizes key features of the LoRa wireless technology such as range, standard, modulation scheme, capacity, physical layer etc.
Specification/feature |
LoRa Support |
Range |
2-5 Km in dense urban and 15 Km in suburban areas |
Frequency band |
ISM band 868 MHz and 915 MHz |
Standard |
IEEE 802.15.4g |
Modulation |
spread spectrum modulation type is used which uses wide-band linear FM pulses. The frequency increase or frequency decrease over certain period is used to encode data information to be transmitted. It gives 30dB improvement over FSK. |
Capacity |
One LoRa gateway takes care of thousands of nodes. |
Battery |
Longer battery life |
LoRa Physical layer |
Takes care of frequency, power, modulation, signalling between nodes and gateway |
Figure depicts LoRa network. It consists of two main entities such as Sensors (or nodes) and LoRa Gateway(or LoRa base station).
LoRa Products and LoRa device testing
Semtech corporation is leader in LoRa wireless technology based products. LoRa has introduced SX127x family of RF Transceivers for supporting LoRa technology for emerging M2M/IoT market. These transceivers operate in 860-1000 MHz and 137-960 MHz range. They have also introduced concentrator in the 860-1000 MHz frequency range.
Semtech also offers LoRa device evaluation and testing devices for 868 MHz band. LoRa base station is also developed by them. Moreover SemTech corporation has developed LoRa development kit useful for the LoRa development/manufacturing companies.
The IoT wireless standards covered are wifi, Z-wave, bluetooth, zigbee, THREAD, RFID, NFC, GPRS, EDGE, UMTS, LTE, ANT+, Cognitive radio, weightless N/W etc. Companies are developing products as per wireless standards outlined here. The idea is to develop IoT product which addresses following key challenges.
• Trade off between power, data rate and coverage range
• Interoperability between wireless standards
• security aspects
• Prevention of interference and failure modes
As there are wireless devices designed and developed based on different wireless standards as outlined above, the biggest challenge is interoperability between these devices in the IoT network. The other challenge is interference among these devices due to frequency of operation either in the same band or nearby bands. The radiated power is also the critical factor to be considered for interference related issues.