# QMI interface unresponsive for first command

**URL:** https://forum.sierrawireless.com/t/qmi-interface-unresponsive-for-first-command/25432
**Category:** MC/EM Series
**Created:** [November 3, 2021, 7:05am UTC](https://forum.sierrawireless.com/t/qmi-interface-unresponsive-for-first-command/25432 "2021-11-03T07:05:45Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [November 3, 2021, 2:21pm UTC](https://forum.sierrawireless.com/t/qmi-interface-unresponsive-for-first-command/25432/2 "2021-11-03T14:21:48Z")

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are you using the MBPL USB driver?

> [@Example on establishing data connection by AT!SCACT via MBPL R20 driver](https://forum.sierrawireless.com/t/example-on-establishing-data-connection-by-at-scact-via-mbpl-r20-driver/24130):
>
> Here is an example to establish data connection by AT!SCACT via MBPL R20 driver: Module: WP7609 FW: R13 MBPL: R20 PC Environment: Ubuntu 18 need to install the MBPL R20 driver for qmi\_wwan and qcserial (MBPL\_Drivers\_USB\_R20\_ENG1-src.tar.gz) avoid the Ubuntu changing the network name: ln -s /dev/null /etc/systemd/network/99-default.link sudo apt-get install libqmi-utils sudo apt-get install udhcpc now insert the USB to PC sudo chmod 777 /sys/class/net/wwan0/qmi/raw\_ip …

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