User Manual 1. Product Introduaction 2. Product Configuration 2.1 Access the Gateway 2.2 User Account Management 2.2.1 Register and Delete Account 2.2.2 Disable Default Account 2.3 Network Management 2.3.1 Static IP Address Setting 2.3.2 Dynamic IP Address Setting 2.4 System Management 2.4.1 Time Setting 2.4.2 Time Zone Setting 2.5 View Disk Space 2.6 Shut Down 2.7 View Firmware Version 3. Development and Debugging 3.1 Serial Port 3.2 USB 3.3 HDMI 3.4 Cellular Network 1. Production Introduction The EC900-NRQ3 series edge computer(EC900-NRQ3) is a high performance edge computer developed for industrial IoT applications. With powerful edge computing capabilities, comprehensive security protection and wireless services, EC900-NRQ3 can support the networking connection to up to tens of thousands of devices, providing high-speed data channels in the true sense of device informatization. The EC900-NRQ3 is providing a powerful computing platform with an ARM Cortex-
A55@2.0GHz quad-core processor and 2GB of RAM and 16GB of eMMC FLASH. Based on Debian, the EC900-NRQ3 provides a secondary development platform with support for C/C++/Java/Python/.Net/JavaScript,etc, which is easy for users to develop and port applications.The EC900-NRQ3 supports Secure Boot, TPM,etc, to ensure the security of user software and data. In addition, the EC900-NRQ3 provides uninterrupted Internet access for machines over ubiquitous the globally deployed LTE wireless network and a variety of broadband services. 2. Device Configuration 2.1 Access the Gateway The default IP address of LAN1 port of EC900-NRQ3 is 192.168.3.100, and the default IP address of LAN2 port is 192.168.4.100. Set the IP address of PC and LAN1 port in the same network segment, select "Use the following IP address". Enter the IP address (default is 192.168.3.2 - 192.168.3.254 in any value). Subnet mask (default 255.255.255.0). Default gateway (default 192.168.3.100) and DNS server address, click <OK>. Using SSH commands to access the EC900-NRQ3 ( Port 22 ) 1 ssh edge@192.168.3.100 Plain Text copy Enter the SSH password. The default factory username is edge, and the password is security@edge. The factory setting of EC900-NRQ3 has created root by default, but it is not available to log in. If you need to use the root account, please modify the system configuration manually. The edge user is in the sudo user group, so you can use the sudo command to execute system-level commands. Note: For security reasons, it is strongly recommended that you disable the default user and create your own user account. 2.2 User Account Management Use sudo -i (or sudo su) command to switch to the root account. For security reasons, do not operate all commands under the root account (More about sudo commands, please visit https://wiki.debian.org/sudo). 2.2.1 Registered and Delete Account You can use the useradd and userdel commands to create and delete user accounts. Please refer to the main page of these commands to set the access rights for the account. The following example shows how to create a test user in a sudo group with a default login shell of bash and a home entry of
/home/test. 1 sudo useradd -m -G sudo -s /bin/bash test Plain Text copy To change the password for the user name(test), use the passwd command and enter the new password, then confirm the change by re-entering the password as shown below. 1 sudo passwd test Plain Text copy 2.2.1 Disable Default Account Use the passwd command to lock the default user account so that users edge cannot log in. Plain Text copy 1 2 sudo -i passwd -l edge Unlock user edge 1 passwd -u edge Plain Text copy 2.3 Network Management Input cd /etc/network/interfaces.d command to change destination. 1 cd /etc/network/interfaces.d Plain Text copy Input sudo vim eth1 or sudo vim eth2 to edit the network configuration file. You can configure the Ethernet port of the EC900-NRQ3 to use a static IP address or to obtain an IP address dynamically(DHCP). 2.3.1 Static IP Address Setting To set a static IP address for the eth1 port of the EC900-NRQ3, use the iface command to modify the default grid gate, address, and network mask of the Ethernet port, as shown in the following figure. 2.3.2 Dynamic IP address setting To configure one or two ports to request IP addresses dynamically, please use the dhcp option instead of the static option in the iface command, as shown below. 2.4 System Management 2.4.1 Time Setting There are two kind of time of EC900-NRQ3 that can be set. One is the system time, the other is the RTC
(RealTime Clock) time saved by the EC900-NRQ3 hardware. Use the date command to query the current system time or set a new time. Use the hwclock command to query the current RTC time or set a new RTC time. Use date MMDDhhmmYYYY command to set system time. MM = Month DD = Day hhmm = Hour, minute. For example. 1 2 date sudo date 112515192021 Set the RTC time to system time using the following command. 1 2 sudo sudo hwclock hwclock -w More about time setting, please visit Plain Text copy Plain Text copy https://www.debian.org/doc/manuals/system-administrator/ch-sysadmin-time.html https://wiki.debian.org/DateTime 2.4.2 Time Zone Setting There are two ways to configure the time zone of the EC900-NRQ3. One is to use the TZ environment variable, the other is to use the /etc/localtime configuration file. Use the TZ environment variable The format of the TZ environment variable is as follows. TZ=<Value>HH[:MM[:SS]][daylight[HH[:MM[:SS]]][,start date[/starttime], enddate[/endtime]]]
e.g. Possible settings for the Eastern Time Zone in North America a. TZ=EST5EDT b. TZ=EST0EDT c. TZ=EST0 In the case a, the reference time is GMT, and the stored time values are correct worldwide. The simple change in the TZ variable allows the local time to be printed correctly in any time zone. In the case b, the reference time is Eastern Standard Time, and the only conversion performed is daylight saving time(DST). Therefore, it is not necessary to adjust the hardware clock for daylight saving time(DST) twice a year. In the case c, the reference time is always the reported time. You can use this option if the hardware clock on your machine automatically adjusts for daylight saving time(DST), or you want to manually adjust the hardware time twice a year. 1 2 TZ=EST5EDT export TZ Plain Text copy If you want the time zone setting to be valid after rebooting the EC900-NRQ3, please ensure including the TZ setting in the /etc/rc.local file. The following table lists other possible values for the TZ environment variable. Use the /etc/localtime configuration file The local time zone is stored in the /etc/localtime file. If the "TZ" environment variable is not set, the Glibc library will use the time zone configuration in the /etc/localtime file.This file is a symbolic link to the /usr/share/zoneinfo/ file, please find a suitable time zone information file and overwrite the original /etc/localtime file in the EC900-NRQ3, as shown in the following figure. 1 2 3 ls -l /etc/localtime sudo rm -rf /etc/localtime sudo ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime Plain Text copy 2.5 View Disk Space To view the free disk drive space, use the df command with the - h option. The system will return the amount of disk space by file system divided. 1 df -h Plain Text copy 2.6 Shut Down You can shut down all software running on the device and stop the system by using the Linux command
"shutdown" or by pressing the power button. However, after running this command, major components such as the CPU, RAM, and storage devices will continue to be powered, as shown in the following figure. 1 sudo shutdown -h now Plain Text copy Pressing the power button:
For the full shut down of the EC900-NRQ3, please disconnect the power to the EC900-NRQ3. When the EC900-NRQ3 is powered off, major components such as the CPU, RAM and memory devices will be shut down, but the internal clock may retain battery power. 2.7 View Firmware Version The ecversion command is used to query the firmware version number, and the parameter "-a" can be used to view the version details. Shell copy 1 2 3 4 root@edge-computer:~# ecversion EC902 version 1.0.1 root@edge-computer:~# ecversion -a EC902 version 1.0.1 Build 2022223 3. Development and Debugging 3.1 Serial Port The EC900-NRQ3 provides two serial ports, both of which support RS232 or RS485 or RS422 communication (only one of the three can be used at any one time). PIN Definition Description 1 2 3 4 5 6 7 8 9 232 RxD/422 TxD+
232 TxD/485 B/422 RxD-
GND A/RxD+
TxD-
232 receive/422 send+
232 send/485 signal B/422 receive-
232 signal ground 485 signal A/422 receive+
422 send-
The commands to set the COM port are as follows Plain Text copy 1 ih-uart-ctl -p 0 -m 0 The parameter 0 after -p indicates COM1, parameter 1 indicates COM2. The serial port name of COM1 is ttyS3, and the serial port name of COM1 is ttyS4. The parameter 0 after -m indicates RS232, 1 indicates RS485, 2 indicates RS422, and the default baud rate is 9600. The stty command can be used to view and modify the configuration of the serial port. More about stty command, please visit https://www.gnu.org/software/coreutils/manual/coreutils.html#stty-
invocation I. View serial port configuration 1 stty -a -F /dev/ttyS3 II. Modify the serial port configuration 1 stty -F /dev/ttyS3 ispeed 115200 ospeed 115200 cs8 Plain Text copy Plain Text copy 3.2 USB Currently, USB only supports mounting USB flash drives. After the USB drive is successfully mounted, you can view the drive files in /mnt/sd destination. 3.3 HDMI After connecting the display with the HDMI cable, the Linux login screen is displayed and the login is completed by entering the user name and password. 3.4 Cellular Network I.Enable/disable redial 1 2 3 4 5 systemctl enable redial systemctl start redial systemctl restart redial systemctl stop redial // If need to enable redial, automatic redial will occur after rebooting the device. systemctl disable redial Shell copy II. Check if the redial is successful 1 sudo ifconfig If ppp0 is connected in the output, then the dial-up is successful. Shell copy III. Check signal quality, grid status, etc. 1 sudo nvram show IV. Switching sim cards Default sim card 1 Shell copy Shell copy 1 2 3 sudo nvram set _cur_sim=0 sudo nvram set wan1_ppp_apn=sim1_apn // If need to set an apn, execute this command and replace sim1_apn with the actual apn. Do not execute this command if there is no apn. sudo systemctl restart redial If switching sim card 2, need to open the dual card function. Shell copy 1 2 3 4 sudo nvram set _cur_sim=1 sudo nvram set wan1_ppp_sim2_apn=sim2_apn // If need to set an apn, execute this command and replace sim2_apn with the actual apn. Do not execute this command if there is no apn. sudo nvram set dual_sim_enable=1 sudo systemctl restart redial V. Enable/disable redial log 1 2 3 4 5 6 7 8 9 Enable redial log touch /tmp/.debug_systools systemctl restart redial tail -f /var/log/messages Disable redial log rm -f /tmp/.debug_systools systemctl restart redial tail -f /var/log/messages Shell copy FCC STATEMENT This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation. NOTE 1: This equipment has been tested and found to comply with the limits for a Class B digital device , pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help. NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. RF Exposure The equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This device should be installed and operated with minimum distance 20cm between the radiator & your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. The availability of some specific channels and/or operational frequency bands is country dependent and firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user. IC STATEMENT This device complies with Industry Canada license-exempt RSS standard(s): Operation is subject to the following Two conditions:
(1) this device may not cause interference, and
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareildoit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. CAN ICES-3 (B) Avis dIndustrie Canada Le prsent appareil est conforme aux CNR d'industrie Canada applicables aux appareils radio exem pts de licence L'exploitation est autorise aux deux conditions suivantes:
1) I'appareil ne doit pas produire de brouillage; et 2) I'utillsateur de I'appareil doit accepterbrouillage radiolectrique subi meme si le brouillage est susceptible d'encompromettre le fonctionnement. mauvais fonctionnement de I'appareil. Cet appareil numriquie de la classe B est conforme la norme NMB-003 du Canada. CAN NMB-3 (B) Radiation Exposure Statement:
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. Dclaration d'exposition aux radiations:
Cet quipement est conforme aux limites d'exposition aux rayonnements IC tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec un minimum de 20cm de distance entre la source de rayonnement et votre corps.