RM500U-CN 5G HAT

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M.2 TO 4G/5G HAT
RM500U-CN 5G HAT
With RM500Q-GL/RM500Q-AE/RM502Q-AE
Sim8202g-m2-5g-hat-b-6.png
With 5G Module and Case
Rm500u-cn-5g-hat-with-case-2.jpg
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Overview

Features

  • Integrates extensive network protocols, with multi drivers and software support, compatible with different OS including Windows / Linux / Android.
  • USB 3.1 port (USB 2.0 compatible) for connecting to PC, Raspberry Pi, or Jetson Nano host board to enable high speed 5G communication.
  • Standard M.2 B KEY slot, compatible with different 5G modules: RM500U-CN / RM500Q-GL / RM500Q-AE / RM502Q-AE series.
  • Onboard UART, PWR, and RST control pin, built-in voltage level translator, enabled via DIP switch, for use with hosts like Raspberry Pi or Arduino.
  • Onboard USB-C connector, enabled via a switch, for connecting standalone power supply for the module, allows more loads, stable amd flexible power supply.
  • Onboard power supply on/off switch, reset button and LED indicator, easy to turn on/off the module or monitor the operating status.
  • 2 x SIM card slot, dual card single standby, switchable via AT command.
  • High-efficiency power supply circuit, up to 3A output current.


Selection Guide

5G Sub-6 RM500U-CN RM500Q-GL RM500Q-AE RM502Q-AE
RM500U-CN-5G-HAT-details-17-1.jpg RM500U-CN-5G-HAT-details-17-3.jpg RM500U-CN-5G-HAT-details-17-5.jpg RM500U-CN-5G-HAT-details-17-4.jpg
Region / Provider China Global (except US) Global (except China) Global (except China)
Operating Temperature -30 °C ~ +75 °C -30 °C ~ +70 °C
Extension Temperature -40 °C ~ +85 °C
Dimensions 30.0 × 52.0 × 2.3 (mm)
Weight 8.9 (g) 8.7 (g)
Power Supply 3.3~4.4 V, typical 3.7 V 3.135~4.4 V, typical 3.7 V
Power Consumption 90 μA @ shutdown

3.7 mA @ hibernate TBD @ USB 2.0, idle TBD @ USB 3.0, idle

70 μA @ shutdown

4.0 mA @ hibernate 32 mA @ USB 2.0, idle 54 mA @ USB 3.0, idle

80 μA @ shutdown

4.2 mA @ hibernate 39 mA @ USB 2.0, idle 54.5 mA @ USB 3.0, idle

Frequency Band
5G 5G NR NSA n41, n78, n79 n41, n77, n78, n79 n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n38, n40, n41, n48*, n66, n71, n77, n78, n79
5G NR SA n1, n28, n41, n77, n78, n79 n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n38, n40, n41, n48*, n66, n71, n77, n78, n79
LTE LTE-FDD B1, B2, B3, B5, B7, B8, B20, B28 B1, B2, B3, B4, B5, B7, B8, B12(B17), B13, B14, B18, B19, B20, B25, B26, B28, B29, B30, B32, B66, B71
LTE-TDD B34, B38, B39, B40, B41 B34, B38, B39, B40, B41, B42, B43, B48
LAA - B46
UMTS WCDMA B1, B2, B5, B8 B1, B2, B3, B4, B5, B6, B8, B19
GNSS - GPS / GLONASS / BeiDou (Compass) / Galileo
Data rate
5G SA Sub-6 downlink 2 Gbps;
uplink 1 Gbps 		downlink 2.1 Gbps;
uplink 900 Mbps 		downlink 2.1 Gbps;
uplink 450 Mbps 		downlink 4.2 Gbps;
uplink 450 Mbps
5G NSA Sub-6 downlink 2.2 Gbps;
uplink 575 Mbps 		downlink 2.5 Gbps;
uplink 600/650 Mbps 		downlink 2.5 Gbps;
uplink 650 Mbps 		downlink 5 Gbps;
uplink 650 Mbps
LTE downlink 600 Mbps;
uplink 150 Mbps 		downlink 1.0 Gbps;
uplink 200 Mbps 		downlink 1.0 Gbps;
uplink 200 Mbps 		downlink 2 Gbps;
uplink 200 Mbps
UMTS downlink 42.2 Mbps;
uplink 11 Mbps 		downlink 42 Mbps;
uplink 5.76 Mbps
* means developing/planning/processing

What's On Board

SIM8202G-M2-5G-HAT-B-details-intro.jpg

Number Name Description
① Raspberry Pi GPIO header Easy connect to Raspberry Pi
② Switch Enable the corresponding pin
③ M.2 interface Compatible with RM500U-CN / RM500Q-CN / RM500Q-GL /RM50XQ-AE and other series of 5G modules
④ SIM card holder Onboard two SIM card slots, dual card single standby. The default SIM1 card slot works, SIM2 is on the back, requires module support, and must be switched through AT commands
⑤ USB 3.1 connector Backward compatible with USB 2.0, can be used to connect to PC/Raspberry Pi/Jetson Nano, etc.
⑥ USB Type-C connector 5V 3A input; stable and flexible power supply
⑦ Audio port SIM82XX series support audio function, RM50XX series do not support this audio function
⑧ Antenna connector Onboard four-way antenna, strong signal
⑨ Reset switch One-key reset
⑩ Power switch To facilitate the power supply mode of the control module:

——If set to USB, the module will provide power through the "⑤.USB3.1 interface";
——If set to EXT PWR, the module will provide power through the "⑥.USB Type-C interface" external power supply

⑪ Cooling fan Cool down the Raspberry Pi and 5G module at the same time
⑫ Indicator Check the module running status anytime, anywhere

Pinout Definition

After connecting to Raspberry Pi, these pins (TX, RX, D4 and D6) can be connected or not through the DIP switch:
M.2-TO-4G-5G-HAT-Pin-defined.jpg

4G/5G modules function testing

Category 4G/5G Module Network Communication GNSS Positioning Voice calls through
Earphone Port		 Dual SIMs UART Interface External Power Supply?
5G SIM8202G-M2 5G/4G/3G Support Support Support Support Optional, but recommended
5G SIM8200EA-M2 5G/4G/3G Support Support Support Support Optional, but recommended
5G RM500U-CN 5G/4G/3G NOT Support NOT Support Support Support Recommended
5G RM500Q-GL 5G/4G/3G Support NOT Support Support NOT Support Recommended
5G RM500Q-AE 5G/4G/3G Support NOT Support NOT Support NOT Support Recommended
5G RM502Q-AE 5G/4G/3G Support NOT Support NOT Support NOT Support Recommended
LTE-A EM06-E LTE-A/4G/3G NOT Support NOT Support NOT Support NOT Support Optional
LTE-A A7906E LTE-A/4G/3G NOT Support NOT Support NOT Support NOT Support Optional
4G SIM7600G-H-M2 4G/3G/2G Support Support NOT Support Support Optional

4G/5G Module Compatibility

If you need to use the M.2 TO 4G/5G HAT for other 4G/5G modules, you can refer to the M.2 connection diagram below, check whether there is any pin conflict, and then connect to test:
M.2-Compatibility.jpg

Working With Windows

Install drivers

  • After connecting the RM500U-CN 5G HAT to the computer through a double-ended usb3.0 data cable, there will be a series of devices without drivers installed on other devices:

RM500U-driver-manager.png

  • Download the driver to your computer and unzip the compressed package.
  • Enter the RM500U_Driver directory.
  • Click setup.exe to install the driver. After the installation is complete, the device manager will generate the following devices:

RM500U-driver-finish.png

Common AT commands

EM25X、EM06E and RM50X series 4G/5G module support AT command control, some basic AT commands are shown in the table below:

RM500U AT LOG.png
Command Description Return Value
AT AT test command OK
ATE ATE1 sets echo
ATE0 turns off echo		 OK
AT+CGMI Query module manufacture OK
AT+CGMM Query module model OK
AT+CGSN Query product serial number OK
AT+CSUB Query module version and chip OK
AT+CGMR Query the firmware version serial number OK
AT+IPR? Set the module hardware serial port baud rate +IPREX:
OK
AT+CFUN=1,1 reset module OK
AT+QUIMSLOT? Query SIM card selection:
Return 1, select SIM card 1;
Return 2, select SIM card 2		 +QUIMSLOT: 1/2
OK
AT+CPIN? Query the status of the SIM card and return READY, indicating that the SIM card can be recognized normally +CPIN: READY
AT+COPS? Query the current operator, the operator information will be returned after normal networking +COPS:
OK
AT+C5GREG? Query 5G network registration status +C5GREG:
OK
AT+QENG="servingcell" Query UE system information
AT+CNMP Network mode selection command:
"mode_pref"：Automatic
"nr5g_band" ： 5G NR
"lte_band"：LTE only
"gw_band"：WCDMA only
... ....		 OK

Open the device manager, find the port number corresponding to AT Port; then open the sscom software, select the corresponding port and baud rate, check AddCrLf; click the sscom EXIT button and pull out the preset It is best to open the serial port and send the corresponding AT command to test.

SIM Card Selection

The 5G HAT has two SIM card slots onboard, a dual SIM card, and single standby, which can be switched and enabled by AT command.

  • SIM card 1 is selected by default, You can use the following command to query and confirm:
AT+QUIMSLOT?
  • To switch SIM card 2, please use the following command:
AT+QUIMSLOT=2
  • Switch back to SIM card 1, please use the following command:
AT+QUIMSLOT=1
  • Check whether the corresponding card slot recognizes the SIM card:
AT+CPIN?
RM500U-CN and RM500Q-GL support Dual SIMs, but RM500Q-AE and RM502Q-AE modules do not support dual SIM cards.

RNDIS dial-up Internet access

  • Download and install the driver
  • Open the RM50X AT port and send the following commands to dial up the Internet:
AT+QENG="servingcell"
AT+QCFG="usbnet",3
AT+CFUN=1,1
  • And then you can find that there are some unrecognized devices in the Device Manager on the computer, such as RNDIS (with exclamation mark).
  • Right-click the 'RNDIS', search "Update Divers" and select "Let me pick from a list of available drivers on my computer", then select "Network adapters" from the device list.
  • Select "Microsoft" in the manufacturer list of the Network adapters window, and then select "Remote NDIS Compatible Device" in the list on the right, which is the remote NDIS compatible device.
  • Click 'Next' and wait for the installation to finish, the RNDIS Kitl device will be installed successfully.
  • RNDIS Dial-up01.png
  • RNDIS windows dial (2).png
  • RNDIS Dial-up02.png
  • RNDIS Dial-up03.png
  • RNDIS Dial-up04.png

Working with Raspberry pi

RM500U is based on the Zhanrui platform, and the dial-up Internet access in the Raspbian system of the Raspberry Pi is unstable; it is recommended to use Openwrt, Ubuntu and other mainstream Linux systems

Ubuntu system use

 sudo apt-get install screenfetch
 screen fetch
 uname -r

800px-RM500U ubuntu uname.png

The USB device descriptor needs to be loaded for the first use

In order to identify a module, the module's VID and PID information needs to be added to the file [kernel]

  • Check the VID and PID of RM500U
 lsusb

RM500U ubuntu lsusb.png

  • Install gcc and make tools
 sudo apt-get install gcc
 sudo apt-get install make
  • Add VID and PID
wget https://www.waveshare.net/w/upload/9/9e/RM500U_FOR_RPI_Ubuntu22.04.zip
unzip RM500U_FOR_RPI_Ubuntu22.04.zip
sudo chmod 777 -R RM500U_FOR_RPI_Ubuntu22.04
cd RM500U_FOR_RPI_Ubuntu22.04
sudo ./install.sh
  • After successfully adding the PID and restarting the Raspberry Pi, enter the following command on the command line interface and five device symbols USB0-USB4 will appear
 ls /dev/ttyUSB*

RM500U ubuntu ttyUSB.png

ECM dial-up

  • open minicom
 sudo apt-get install minicom
 sudo minicom -D /dev/ttyUSB2
  • Send the following commands in minicom for ECM dialing
 AT+CPIN?
 AT+QENG="serving cell"
 AT+QCFG="usbnet",1
 AT+QNETDEVCTL=2,3,1
 AT+CFUN=1,1

RM500U RNDIS DIAL.png

  • After configuring the ECM mode, CTRL+A->X->Yes to exit minicom
  • Use the following commands to get IP and set DNS:
 sudo dhclient -v enxe2f1fbfdd5e7
 sudo apt-get install udhcpc
 sudo udhcpc -i enxe2f1fbfdd5e7
 sudo route add -net 0.0.0.0 enxe2f1fbfdd5e7
  • After dialing, the Raspberry Pi can see that enxe2f1fbfdd5e7 has obtained the ip through the following command (different systems are different, the actual obtained IP shall prevail):
 ifconfig

RM500U ubuntu ifconfig.png

  • Test enxe2f1fbfdd5e7 network status
  ping -I enxe2f1fbfdd5e7 www.baidu.com

RM500U ubuntu ping.png


5G network speed test

In the speed measurement part, because the Raspberry Pi comes with a Gigabit Ethernet port, and there are few USB network cards above Gigabit, we use the SpeedTest For Python tool to perform speed measurement by the commands. Connect to the terminal of OpenWrt and enter the commands one by one to measure the speed: 

## Raspberry Pi OS
sudo apt install speedtest-cli
speedtest      # or use speedtest_cli

or 

## OpenWRT
opkg update   
opkg install python3
opkg install python3-pip
pip install speedtest_cli 
speedtest      # or use speedtest_cli

5G HAT Minicom Serial Port Debugging

4G/5G Modules UART Interface Support

SIM8202G-M2, RM500U-CN, and SIM7600G-H-M2 Support UART Interface, Other 4G/5G Modules NOT Support!

For SIM8202G-M2 and SIM8200EA-M2 these two 5G modules, the UART interface is closed by default and needs to be opened through AT commands: 

AT+CCUART=1

Raspberry Pi Serial Port Enable

Since the Raspberry Pi serial port is used for terminal debugging by default, if you need to use the serial port, you need to modify the Raspberry Pi settings. Execute the following command to enter the Raspberry Pi configuration: 

sudo raspi-config

Select Interfacing Options ->Serial ->NO ->YES to disable serial debugging.
Serial port.png
Open the /boot/config.txt file, and find the following configuration statement to enable the serial port, if not, add it at the end of the file: 

enable_uart=1

Restart to take effect:

1. Insert the module into the Raspberry Pi, and turn the S_TX and S_RX of the DIP switch to ON:
Minicom-serial.png
2. Install minicom, minicom is a serial debugging tool for the Linux platform:

sudo apt-get install minicom

3. Open ttyS0 through minicom——ttyS0 is the serial port of Raspberry Pi 3B/3B+/4B, the default baud rate is 115200;

sudo minicom -D /dev/ttyS0

4. For Raspberry Pi 2B/zero, the user serial device number is ttyAMA0; you can use the following command line to confirm, serial0 is the selected serial device number, as shown below:
RM500U-CN 5G HAT 9.png

Working with Jetson Nano

Hardware Connection

Connect the RM500U-CN with a double-ended usb3.0 data cable, and connect an external 5V power supply to the Type-C power supply port of the RM500U-CN 5G HAT, as shown in the figure:
RM500U-jetson.png

Load USB Device Descriptor

In order to identify the module, the module's VID and PID information needs to be added to the file [kernel]

  • View VID and PID of RM500U
lsusb

Usb-load.png
Added VID sum PID

sudo apt-get install unzip
wget https://www.waveshare.com/w/upload/9/93/RM500U_CN_For_Jetson_nano.zip
unzip RM500U_CN_For_Jetson_nano.zip
sudo chmod 777 -R RM500U_CN_For_Jetson_nano
cd RM500U_CN_For_Jetson_nano
sudo ./install.sh
sudo reboot
Please do not delete or modify the four directory files of option directory, default.script and install.sh, otherwise it will affect the loading of device descriptors!

After successfully adding the PID and restarting Jetson nano, enter the following command in the command line interface to display five device symbols USB0-USB4 

ls /dev/ttyUSB*

Jetson-nano-vid.png

RNDIS

  • Enable minicom.
sudo apt-get install minicom
sudo minicom -D /dev/ttyUSB2
  • Send the following command ECM in minicom.
AT+CPIN?
AT+QCFG="usbnet",3
AT+CFUN=1,1

Rndis-dial.png
After the module restarts, and the NET light is on, use the following command to check the network status (optional). 

AT+QENG="servingcell"

Get the IP and set the DNS with the following commands: 

sudo dhclient -v usb1
sudo apt-get install udhcpc
sudo udhcpc -i usb1
sudo route add -net 0.0.0.0 usb1

After dialing, you can see that usb1 gets the IP through the following command: 

ip route

Ip-route.png
Test usb1 networking status.

 ping -I usb1 www.baidu.com

Ip-route2.png

About Speed

Due to many inconsistencies between actual and laboratory conditions, the 5G speed will not be ideal and stable at 100MBPS. There are the following points:

  • Base station distance, the closer to the 5G base station, the better the signal and the faster the speed;
  • Base station load, the fewer people using it, the faster the speed will be, and the rush hour will be slower;
  • Number of base stations: Due to spectrum relationships, the same amount of 4G coverage requires double the number of 5G base stations
  • Operator: You need to confirm whether your 5G card is limited in speed, you can periodically ask the operator to reset your network
  • Indoors are worse than outdoor: building penetration loss, and indoor diffraction loss

PS: The current number of base stations still does not have good coverage, and the speed measurement in different locations is not the same.


Resources

Program

Assembly drawing

Software

Datasheet

Related Application Cases

FAQ

Question:1. Which platform is the RM500U-CN based on?

 Answer:
RM500U-CN is based on UNISOC platform, mainly used in China
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Question:2. After receiving the Raspberry Pi, it keeps restarting, what is the reason?

 Answer:
The 5G module consumes a lot of power, especially at the moment of network access; the Raspberry Pi has limited power supply capacity, and can be powered by a 5V (3A) power supply through the onboard TYPE-C interface.
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Question:3. Can't access the Internet after restarting the Raspberry Pi?

 Answer:
When using an external power supply, after restarting the Raspberry Pi, the RM500U does not restart. At this time, you can restart the RM500U with the command and so on.

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Question:4. What should I do if the NET light is off and I have not registered to the network?

 Answer:
  • Connected to the SIM Card and Skyline, required to connect to the Four-Root Skyline
  • After confirming the connection, please use the following AT Log check box:
AT+CPIN?
AT+COPS?
AT+QCSQ
AT+QENG="servingcell

RM.png


Question:5. What dial types does the RM500X have?

 Answer:
There are the following dial types: 
AT+QCFG="usbnet",0 driver type is NDIS(QMI));
AT+QCFG="usbnet",1 The driver type is ECM;
AT+QCFG="usbnet",2 The driver type is MBIM; (RM5XXQ support)
AT+QCFG="usbnet",3 The driver type is RNDIS
AT+QCFG="usbnet",5 The driver type is NCM;

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Question:6. The module has been powered on, why does the input command not respond?

 Answer:
Use the following command to turn on the echo, and press Enter after entering: (Blind typing is required here) 
ATE1

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Question:7. How to check the frequency band of the operator?

 Answer:
It can be inquired at the following website:

https://www.frequencycheck.com

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Question:8. Why does the USB power supply fail to power off when the computer is used, but the power goes off when the Raspberry Pi is used, and the NET light does not light up for a while?

 Answer:
The USB power supply capability of the Raspberry Pi is worse than that of the computer. It needs to be connected to an external power supply. Please set the switch to EXT PWR, and connect the HAT interface to a 5V 3A power supply:

RM500U-CN 5G HAT.png

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Question:9. How to confirm the raspberries pie hardware serial port is ttyS0 or ttyAMA0

 Answer:
  • Raspberry PI 2B/zero, the user serial port device number is ttyAMA0;

ls -l /dev/serial*

  • The following command line can be used to confirm that serial0 is the serial port device number selected, as shown in the figure below:

RM500U-CN 5G HAT 9.png


Support

If you require technical support, please go to the Support page and open a ticket.

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