Prometheus Metrics & Grafana

Name: QManager
Author: dr-dolomite

Integrate your cellular modem into your existing monitoring infrastructure.

QManager RM551E Prometheus metrics screen — RM551E: Let a Prometheus server collect signal and health readings, with a ready-made scrape config.

The /metrics Endpoint#

QManager exposes a standard Prometheus scrape endpoint at:

http://<modem_ip>/cgi-bin/quecmanager/metrics

(Or http://<modem_ip>/metrics on RM520N)

No authentication token is required if scraped from trusted internal subnets.

Sample Prometheus Metrics#

PromQL

# HELP qmanager_signal_rsrp Serving cell RSRP in dBm
# TYPE qmanager_signal_rsrp gauge
qmanager_signal_rsrp{carrier="T-Mobile",band="n41",pci="184"} -82

# HELP qmanager_signal_sinr Serving cell SINR in dB
# TYPE qmanager_signal_sinr gauge
qmanager_signal_sinr{carrier="T-Mobile",band="n41"} 22.4

# HELP qmanager_antenna_rsrp Per-antenna RSRP in dBm
# TYPE qmanager_antenna_rsrp gauge
qmanager_antenna_rsrp{antenna="ant0"} -82
qmanager_antenna_rsrp{antenna="ant1"} -84
qmanager_antenna_rsrp{antenna="ant2"} -83
qmanager_antenna_rsrp{antenna="ant3"} -85

# HELP qmanager_traffic_bytes_total Total bytes transferred
# TYPE qmanager_traffic_bytes_total counter
qmanager_traffic_bytes_total{direction="rx"} 1845291048
qmanager_traffic_bytes_total{direction="tx"} 245109281

Grafana & Home Assistant Integration#

Home Assistant: Add the Prometheus sensor integration to trigger automations if signal drops.
Grafana Dashboard: Import QManager's official Grafana dashboard JSON for real-time graphs of RSRP, SINR, throughput, and temperature.