DWM1001-DEV Tag Cannot Detect Anchors (AN: cnt=0)
Issue Summary
• Setting up a UWB-based real-time location system (RTLS) using DWM1001-DEV .
• Tag and Anchors are set to the same PAN ID (0x1234) .
• However, the Tag is unable to detect any Anchors .
• Running la (list anchors) returns AN: cnt=0.
• Running les and lep also shows no detected anchors .
• Both Tag and Anchors remain in a uwbmac: disconnected state.
Troubleshooting Steps Taken
- Verified PAN ID for both Tag and Anchors (si command)
• PAN ID confirmed as 0x1234 on both devices.
• Tag is in tn mode (passive)
• Anchor is in an mode (active) .
• No connection established (uwbmac: disconnected) .
- Reduced distance between Tag and Anchors (within 1-2 meters)
• Still AN: cnt=0 in la command .
- Rebooted both Tag and Anchors (reset command)
• No changes. Tag still cannot detect Anchors .
- Restarted UWB module on Tag (nmt restart)
• After restarting, ran la, les again → No detected Anchors.
- Performed a Factory Reset on Tag (nvm erase && reset)
• Reconfigured PAN ID (nvm cfg panid 0x1234 && nvm save && reset).
• Settings applied correctly, but no improvement .
Current System Status
| Device | PAN ID | Mode | Connection Status |
|---|---|---|---|
| Tag | 0x1234 | tn (Passive) | uwbmac: disconnected |
| Anchor | 0x1234 | an (Active) | uwbmac: disconnected |
• Despite having the same PAN ID, the Tag is unable to discover any Anchors.
• Running la, lep, les does not return any detected Anchors.
• Tag remains in a disconnected state.
Questions
-
What could be causing the AN: cnt=0 issue?
-
Why is the Tag unable to detect Anchors even after nmt restart ?
-
Is there a way to force the Tag to search and connect to Anchors manually ?
-
Would updating to the latest firmware resolve this issue?
Any insights or suggestions would be greatly appreciated!
Has anyone encountered a similar issue, or does anyone have a potential solution?
Thanks in advance for your help! 