nt2mqtt
WPILib FRC Network Tables to MQTT
Goals
- Stream live data from the robot to Grafana during test/practice
- Useful for troubleshooting and testing
- Same data being sent to the dashboard
- Store data for later analysis
- Lower-resolution version of the streaming data
- Use Grafana for post-match analysis of critical systems and sensors
- Time syncronization to correlate data with points during the match
- Leverage Grafana annotations API to highlight segment of data during the match(?)
Overview
The general flow is as follows:
flowchart
NT["Network Tables"]--NT Protocol-->Bridge
Bridge--MQTT Protocol-->Mosquitto
Mosquitto--Live Stream API-->Grafana
Mosquitto--Telegraf MQTT Sub-->Telegraf
Telegraf--HTTP API-->InfluxDB
InfluxDB--Stored Metrics Query-->Grafana
Reference Links
- Streaming MQTT sensor data: https://grafana.com/blog/2021/08/12/streaming-real-time-sensor-data-to-grafana-using-mqtt-and-grafana-live/
- MQTT data sourcehttps://grafana.com/grafana/plugins/grafana-mqtt-datasource/
- Streaming Telegraf data: https://grafana.com/tutorials/stream-metrics-from-telegraf-to-grafana/
- Annotations: https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/annotate-visualizations/