How to query the 13 digits of IOT card with at command?

To query the 13 bit of the Internet of Things card by using the AT command, you can follow the following steps:

1. Connect the IOT card: Insert the IOT card into a device that supports SIM card, such as a mobile phone, modem or USB converter.

2. Establish serial port connection: connect the device to the computer through USB or serial port. You may need to install the corresponding driver.

3. Open terminal software: use terminal emulation software (such as SecureCRT, Putty or Tera Term) to open serial connection.

4. Enter the command mode: send the "AT" command at the terminal. If the terminal replies "OK", it means that the command mode has been successfully started.

5. Inquire about the digits of the Internet of Things card 13: Enter the "AT+CIMI" command and send it to the device. This command will return the 13 digits of the IOT card.

Please note thAT before using the at command to query the 13 bit of the Internet of Things card, you need to ensure that the device is connected correctly and the correct serial port parameters are configured. In addition, there may be some differences between different devices and IOT platforms, so you may need to refer to the documentation of relevant devices and platforms to obtain accurate commands and operation steps.

If you encounter any problems or the query is unsuccessful, it is recommended that you refer to the documentation of the equipment and the Internet of Things platform, or consult relevant technical support personnel.