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RM551E Series (Custom OpenWRT)

Installation on RM551E (Custom OpenWRT)

Step-by-step setup guide for Quectel RM551E modems running dedicated custom on-modem OpenWRT.

4 min read · Updated

Installation on RM551E (Custom OpenWRT)

This guide covers installing QManager on the Quectel RM551E series modem, which operates with a dedicated on-board custom OpenWRT baseband environment (unlike the RM520N which runs native Qualcomm SDXLEMUR Linux). Once installed, the modem can sit in a standalone 5G-to-Ethernet board and plug into the WAN port of any router.

Prerequisites#

  1. An RM551E modem running on-board custom OpenWRT.
  2. SSH access to your modem (ssh root@192.168.224.1).
  3. An active internet connection (or see Manual Offline Installation).
  4. curl installed (opkg update && opkg install curl). Note: The installer strictly requires curl (tools like BusyBox wget or uclient-fetch are not supported).

One-Line Automated Installation#

Open your terminal or SSH client, connect to your RM551E modem, and execute:

Shell
curl -sL https://raw.githubusercontent.com/dr-dolomite/QManager/main/qmanager-installer.sh | sh

What the Installer Does Automatically#

  1. Queries the GitHub Releases API to identify the latest compatible release tarball.
  2. Downloads qmanager.tar.gz and verifies its SHA-256 integrity hash.
  3. Decompresses the frontend assets into /www/qmanager (or /www root if selected).
  4. Installs CGI endpoints into /www/cgi-bin/quecmanager/.
  5. Configures uhttpd web server to handle JSON API requests and static routing.
  6. Sets up procd services for the connection watchdog and live signal background broker.

Selecting Release Channels#

By default, the installer grabs the newest available release. You can specify channel flags if desired:

Install Latest Stable Release Only#

Shell
curl -sL https://raw.githubusercontent.com/dr-dolomite/QManager/main/qmanager-installer.sh | sh -s -- --channel stable

Pin a Specific Version Tag (e.g. v0.1.35)#

Shell
curl -sL https://raw.githubusercontent.com/dr-dolomite/QManager/main/qmanager-installer.sh | sh -s -- --tag v0.1.35

Post-Installation Verification#

  1. Open your web browser and navigate to:

    http://192.168.224.1

    (Stock on-modem RM551E default IP address)

  2. If prompted, log in with your modem root credentials.

  3. The dashboard will automatically probe the serial port (/dev/ttyUSB2 or /dev/cdc-wdm0) and begin streaming real-time signal metrics!

Uninstalling QManager#

To completely remove QManager and all associated services from your RM551E modem:

Shell
curl -sL https://raw.githubusercontent.com/dr-dolomite/QManager/main/qmanager-installer.sh | sh -s -- --uninstall