Common questions

This page is an index, not an article. Each question links to the place where it is answered in context, together with everything else you need to know about that topic.

• What do the LEDs mean? → LEDs & troubleshooting
• Does it matter which USB-C port powers it? → Power
• PoE or USB, and what does the jumper do? → Power
• Does the receiver support Wi-Fi? → Getting online
• My phone will not do USB tethering — why? → Getting online
• Where is the web interface? → Configuration — there is none; use the portal or USB
• Which antenna can I use? → Antennas & polarization

• Why is reception poor despite a good mounting height? → Interference
• Why is my node so hot? → Temperature
• Do I need surge protection for an outdoor node? → Surge protection
• What do I print the enclosure in? → Enclosure

• What is the QR code on the back of the case? → Accessing your node
• How does OpenTrafficMap know where my node is? → Show on map & coordinates
• Why is my node not visible on the map? → Show on map & coordinates
• How do I get a readable name instead of a MAC address? → Friendly name

• How do I see the raw packets my node sends? → Subscribe to your node
• Is there a buffer when the node is offline? → Wire format — no, it is a live stream
• How do I monitor my node in Home Assistant? → Monitoring in Home Assistant
• Is there an API for the collected data? → Topics — there is no separate API; the MQTT broker is the interface

• Which cars actually transmit? → Senders
• Is my city covered? → Coverage
• What is a CAM, a DENM, a SPATEM? → Message types
• Is this legal to receive? → How it works — the messages are broadcast unencrypted