ICP DAS USA GRP-2841M User Manual

4g / 5g / ethernet gateway

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Version 1.1.0 Aug 2022

GRP-2841M

4G / 5G / Ethernet Gateway

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Page 1 User Manual Version 1.1.0 Aug 2022 GRP-2841M 4G / 5G / Ethernet Gateway...
Page 2: Table Of Contents
Table of Contents Introduction ......................... 5 Hardware Specification ....................... 6 2.1 GRP-2841M Specifications ..................... 6 2.2 Accessories Specifications ....................7 Application Architecture ..................... 9 3.1 4G / 5G Wireless Router ....................9 3.2 Remote Video Monitor ....................9 3.3 Serial Port Gateway Application ..................10 3.4 Node-RED Application ....................
Page 3 6.7 RTU Client for Remote Control Application with InduSoft..........80 6.8 Email or FTP report I/O logger file................. 82 Appendix A. Revision History ....................85 GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 4 Contact us If you have any problem, please feel free to contact us. You can count on us for quick response. Email: service@icpdas.com GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 5: Introduction
Introduction The GRP-2841M provided by ICP DAS is a gateway for Ethernet and serial port. The GRP-2841M can be used for wireless data transmission and other functions through its optional 4G / 5G / Wi-Fi communication module. With the optional GPS function, the GRP-2841M can also be used as a GPS tracking system for vehicle management or maritime system.
Page 6: Hardware Specification
Ambient Relative Humidity 10 ~ 90% RH, Non-condensing Power Input Range +12 ~ 48 VDC Consumption 9.6 W (0.4 A @ 24 VDC)  GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 7: Accessories Specifications
51.0mm × 30.0mm × 30.0mm × 52.0mm × 30.0mm × 52.0mm × Dimensions 4.9mm 4.9mm 2.3mm 2.3mm For further information, please refer to https://www.icpdas.com/en/product/guide+Wireless__Communication+3G_4G_5G__Products +Modem#1246 GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 8 Open / WPA / WPA2 Client for AP mode Max. 16 Clients Environment Operating Temperature -40°C ~ +85°C Range Dimensions 30.0mm × 26.8mm × 3.0mm GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 9: Application Architecture
Application Architecture 4G / 5G Wireless Router Remote Video Monitor GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 10: Serial Port Gateway Application
Serial Port Gateway Application Node-RED Application *About Node-RED, please download Node-RED package from https://www.icpdas.com/en/download/index.php?model=GRP-2841M for detail. The Node-RED package includes demos, manuals, and patch file. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 13: Led Indicators
200 ms OFF EC2X 200 ms ON Network Searching (4G Modem) 1800 ms OFF 125 ms ON Data transfer 125 ms OFF GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 14: Rotary Switch
"192.168.255.1". It is useful when users forget the Ethernet IP. Mounting the Expansion Components GRP-2841M has two mini pcie sockets and one M.2 socket to expand the wireless communication function. Please refer to the following installation steps for installation requirements.
Page 15: Mounting The Communication Module
 If the communication module is RYWDB00 (Wi-Fi module), please plug it into the mini pcie socket_2. (3) Fasten the communication module using the screws supplied. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 16 Warning: 4G and 5G modem cannot be used at the same time. (4) Connect the communication module using the ipex connector supplied GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 19: Install The Sim Card
Install the SIM card Before using mobile communication, users need to install a SIM card. Please follow the steps. (1) Remove stripped screws and then remove the cover GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 20 (2) Insert the SIM card (3) Close the cover and then fasten the screws. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 21: Installing The Antenna
Installing the antenna GRP-2841M has four antenna ports, which can be used to connect 4G/5G and GPS antennas. To install the antenna, simply screw the antenna into the connector and place the antenna in the designated position. Regarding 4G or 5G antennas, there are the following options...
Page 22 1575.42±5MHz ANT-115-03-2 4G Modem (GPS/Glonass) 1610±8MHz passive antenna ANT-115-P1 5G Modem 1575.42±5MHz (GPS) For further information, please refer to https://www.icpdas.com/en/product/guide+Accessories+Antennas+Antenna#1232 GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 23: Web Utility
 Default Mask is “255.255.0.0”.  Default username is “admin”.  Default password is “admin_GRP”. The web page after login is as follows. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 24: Information
The “Device Information” page provides basic device information.  Serial Number: Serial number of ICPDAS product.  Kernel Version: Linux kernel version.  Firmware Version: Firmware version. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 25: Network Information
 MAC Address: Unique identifier assigned to the network interface.  IP Address: Computer address under Internet protocol.  Mask: The mask will be provided by the gateway provider. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 26  GPS is ready: Click "Show Map" to show the location of the GRP device  No GPS data: Unable to locate.  GPS Data: Display GPS raw data. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 27: Storage Information
The “Ethernet” page provides basic settings for Ethernet0 (LAN1) and Ethernet1 (LAN2) (1) IP Address: Ethernet IP. (2) Mask: Ethernet mask. (3) Gateway: Gateway IP. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 28: Wlan
(5) Channel: the channel of this Wi-Fi AP. (6) Security: set no security or WPA2-PSK security mode. (7) Password: if use WPA2-PSK, need to set password for 8~64 characters. Station Mode: GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 29: Pin / Apn Configure
The PIN code is a 4-character number provided by the SIM card provider.  Phone Number: It is generally filled in as "*99***1#" or "*99#", depending on the GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 30: Network Reconnection
 Enable Function: Whether to enable this function. This setting will run immediately. 5.3.5 DNS The "DNS" page provides the settings of the DNS server IP. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 31: Ddns Client
The time period (in seconds) to update the address; fill in 0 to disable this function. 5.3.7 VPN The "VPN" page provides the function of creating a VPN connection (in PPTP protocol). GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 32  DDNS Domain Name: The domain name registered by the user.  DDNS Username: The username of the DDNS service.  DDNS Password: The password of the DDNS service. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 33: Dhcp Server
Mask is a 32 bits address used to distinguish between a network address and a host address in IP address.  Router: IP address of this device. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 34: Routing & Port Mapping & White List
 “eth0” is “Ethernet0 (LAN1)”  “eth1” is “Ethernet1 (LAN2)”  “wwan0” is “4G network”  “rmnet_usb0.1” is “5G network”  For example: GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 35  Target Port: The forward port of the socket.  For Example: Rule 0 will bind sockets from "eth0" and port "10080" to “10.0.255.100:80”. The “Whitelist” page provides setting of white list. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 36: Diagnostic
Please set it carefully, devices not in the list will not be able to connect 5.3.10 Diagnostic The “Diagnostic” page provides tools for checking network issues. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 37: Reset Network
 Route Information: This tool will show route settings below. 5.3.11 Reset Network The "Reset Network" page provides the function of resetting all Ethernet, DHCP, routing rules and port forwarding settings. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 38: System
The "Reboot" page provides the function of restarting the device. 5.4.3 Reboot Timer The "Restart Timer" page provides the function of automatically restarting the system. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 39: Backup & Restore
The "Update" page provides a firmware update function. Users can download the update file (".tarc") from the IPCDAS website, and then put it into the SD card. Please back up the configuration before updating and restore it after the update. GRP-2841M User Manual Version 1.1.0 Page：...
Page 40: Restore Factory
 Timezone: If the user does not know your time zone, please click the "Check Time Zone" link to find it. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 41: Vxserver
PC to communicate with the COM port of the device. 5.5.1 VxServer The "VxServer" page provides the function of establishing a connection with the VxServer. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 42  [2] If the time interval between two serial data is greater than this value, the data will be divided into two network packets. If there is not enough time interval, but the data length exceeds the “Data Length”, the data is still divided into two network packets. GRP-2841M User Manual Version 1.1.0 Page：...
Page 43: Rtu Client
RTU Center IP or domain name.  Server Port: RTU Center port number.  Station ID: The unique ID used to identify the device. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 44 Modbus Number tab  Modbus Device Number: The Modbus device number is displayed here. Users can select a model in the list, and then click "Add" to GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 45  AO Address: The start address for reading AO value.  [1] For Modbus RTU device, fill in COM number, ex: COM1 / COM2 / COM3. If blank, the default is COM2. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 46  Email Username: The username of email account.  Email Password: The password of email account.  Enable Email Function: Enable email report function. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 47: Ftp Test
The username of FTP account.  FTP password: The password of FTP account. 5.6.3 Email Test The "Email Test" page provides tools for sending test emails. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 48: Modbus Test
 [2] Usually 25, 465, or 587. 5.6.4 Modbus Test The “Modbus Configure Test” page provides tools for polling Modbus devices. The following is an example of ET-7026. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 50: Example
(2) Fill in the Ethernet IP and mask. After finishing all the settings, click "Modify". (3) If necessary, fill in "PIN Code", "APN", "User Name" and "Password". After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page：...
Page 51 Server IP can fill in user server IP or Google DNS server IP (8.8.8.8). If the user uses MDVPN, please make sure that the server IP does not deny the ICMP service (Ping). After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page：...
Page 52 (5) Fill in the routing rules to share the 4G/5G network. Rule 0 will share the 4G/5G network to IP addresses from 192.168.0.1 to 192.168.0.255. After finishing all the settings, click "Modify". (6) Please reboot the device to enable the setting. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 53: Web Server And Ip Camera Application
 Mask is “255.255.0.0”.  Gateway is “192.168.27.31”. (2) Fill in the Ethernet IP and mask. After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 54 Server IP can fill in user server IP or Google DNS server IP (8.8.8.8). If the user uses MDVPN, please make sure that the server IP does not deny the ICMP service (Ping). After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page：...
Page 55  Bind port 12180 of 4G / 5G network interface to “192.168.0.21:80”.  Bind port 12280 of 4G / 5G network interface to “192.168.0.22:80”. (6) Please reboot the device to enable the setting. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 56 (7) To view the IP camera image from a web browser, please enter the IP address or domain name of the GRP device in the 4G / 5G network. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 57: Remote I/O Control / Temperature Monitor
(2) Open VxServer and VxComm Utility software. (3) If necessary, fill in "PIN Code", "APN", "User Name" and "Password". After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 58 Server IP can fill in user server IP or Google DNS server IP (8.8.8.8). If the user uses MDVPN, please make sure that the server IP does not deny the ICMP service (Ping). After finishing all the settings, press the "Modify" button. GRP-2841M User Manual Version 1.1.0 Page：...
Page 59 (5) Fill in the “Server IP” and “Server Port” (default 11000). After finishing all the settings, check the "Enable" field, and then press the "Modify" button. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 60 2. For more information about VxComm Utility, please refer to http://www.icpdas.com/en/product/guide+Software+Utility_Driver+VxComm__(Virt ual__COM)#452 B. Press the "Search Servers" button to get the device list. C. Right-click on "GRP-2841" D. Click "Add Server". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...
Page 61 E. Select the starting number of the virtual serial port. F. Change the settings tab to "Server Options" and set it as screenshot. G. Click “OK”. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 62 COM port. A. Click “Tools / Restart Driver” to restart the driver. B. Open the com port to connect your device. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 63: Modbus Tcp To Modbus Rtu Over 4G / 5G, And Card Reader Monitor
For more information about VxServer, please refer to http://www.icpdas.com/en/product/guide+Software+Applications+VxServer (3) If necessary, fill in "PIN Code", "APN", "User Name" and "Password". After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 64 Port1 (RS-232) as the default value. For Modbus RTU devices, set Port2 (RS-485) as follows. After finishing all the settings, check "Enable Function", and then click"Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 66 (8) After the GRP device is connected to VxServer, user can connect to "127.53.0.1:10001" and "127.53.0.1:10002" (port 10001 is RS-232; port 10002 is RS-485) to send/receive Modbus RTU commands using Modbus TCP program. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 67: Rtu Client For Remote Control Application With Rtu Api
(1) Please connect the RS-485 or Ethernet of the device (ET-7k or M-7k module) to GRP-2841M (1) If necessary, fill in "PIN Code", "APN", "User Name" and "Password". After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 68 Server IP can fill in user server IP or Google DNS server IP (8.8.8.8). If the user uses MDVPN, please make sure that the server IP does not deny the ICMP service (Ping). After finishing all the settings, click "Modify". GRP-2841M User Manual Version 1.1.0 Page：...
Page 69 (3) Select “ET-7050” in the list, and then click "Add", the web will display all I/O number information, as shown below. Modify the "Device Name", "Device ID", "IP" and "Port" of ET-7050, and then click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 70 Modify the "Device Name" and "Device ID" of M-7022 (keep the default values of “IP" and "Port"), and then click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 71 (5) Select ”Custom” in the list, and then press the "Add" button, the web will display all I/O number information, as shown below. Modify the “Device Name”, “Device ID”, “DI Number”, “AI Number” of PLC, and then click "Modify". GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 72 (6) Select the "Modbus Test" function, and then press the "Test" button to test the settings. If the result is successful, follow the next step. If the result failed, please check your settings or wiring. GRP-2841M User Manual Version 1.1.0 Page：...
Page 73  Fill in the “Station ID”(different from other RTU equipment).  Fill in the “Data Update Period” and “Heartbeat Period” (0 disable).  Fill in the RS-485 configuration of the Modbus RTU device. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 74 (9) After reboot, the GRP device will automatically connect to RTU Center. (10) Double-click "ET-7050" to call up the "Output Control Panel", and press "DO1" to control the remote DO. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 75 The demo must be in the same folder as RTU Center, because the same memory is shared in “M2M_RTU.dll”. Here we copied "RTU_CS_demo.exe" and "M2M_RTU_NET.dll" from the C# demo. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 76 D. Fill in "Modbus ID" as "Modbus ID" of ET-7050, and "Modbus Name" as "ET-7050", and then press "ReadData" to get all IO data. E. Press the "Write Dos (add 1)" button to control DO. GRP-2841M User Manual Version 1.1.0 Page：...
Page 78: Rtu Client For Remote Control Application With Opc Da Server
(1) For RTU Client and RTU Center, please refer to the previous section. (2) Open NAPOPC.M2M DA Server, and then click "Search" to automatically add all the tags of the device. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 79 (3) Double-click the device node to modify the device name. (4) Now users can use OPC Client to read I/O data from NAPOPC.M2M DA Server, or use the client "Monitor" to monitor all I/O data. GRP-2841M User Manual Version 1.1.0 Page：...
Page 80: Rtu Client For Remote Control Application With Indusoft
(2) Right-click the OPC DA 2.05 folder and insert a new worksheet. (3) Select OPC Server from the “Server Identifier”, and then select the “NAPOPC.M2M” item from the combo box. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 81 (4) Configure label names and item columns A. Fill in the “Tag Name”. B. Double-click the “Item” column and select the point from the pop-up window. C. Click “OK”. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 82: Email Or Ftp Report I/O Logger File
Email or FTP report I/O logger file. This example shows how to use GRP devices to periodically report I/O recorder files. (1) For Modbus configuration, please refer to section 4.5. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 83 C. To use FTP function, fill in all setting and check "Enable FTP Function". To use Email function, fill in all setting and check "Enable Email Function". D. Click “Modify” GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 84 (3) Finally, enable this function in the "Main Info" tab. If the user does not need to send data to the RTU Center, set the "Data Update Period" to 0. GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved...
Page 85: Appendix A. Revision History
Version Date Description of changes 1.0.0 2021-10-05 The First Release Revision 1.1.0 2022-08-05 1. Add "Node-RED" Application 2. Add Wi-Fi module support GRP-2841M User Manual Version 1.1.0 Page： Copyright © 2022 ICP DAS Co., Ltd. All Rights Reserved E-mail: service@icpdas.com...

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