Template: RM500U-CN 5G HAT FAQ

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FAQ

 Answer:
  • RM500U-CN: Based on Spreadtrum.
  • RM500Q-GL: Based on Qualcomm, support GNSS positioning, for China.
  • RM500Q-AE/RM502Q-AE: based on Qualcomm, support GNSS positioning, except China.
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 Answer:
AT+QCFG="data_interface"
     AT+QCFG="data_interface",0       //Modify it as USB mode

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 Answer:

Please change the dial mode to the stable router mode by the following commands:

AT+QCFG="nat",1

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 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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 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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 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


 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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 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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 Answer:
It can be inquired at the following website:

https://www.frequencycheck.com

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 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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 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


 Answer:
  • The AA version (with USB function) M.2 B KEY interface module is required. The AP version (PCIE, without USB function) module is not supported.
  • If it is an M.2 B KEY interface and conforms to the line sequence shown in the figure below, the AA version module (with USB function) can be connected and used:

RM520N-GL91.png


 Answer:

5G power consumption is relatively huge, and the host computer's USB port may not be able to carry it, please refer to the USB dual plug cable to provide the module with sufficient power, as shown in the figure:
RM500-CN-5G-HAT-FAQ.jpg

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