Two XA-Z14-CS2PH-W XBee 232 adapters were configured as a coordinator/router pair for a half-duplex wireless serial link. Router-to-coordinator traffic worked, but coordinator-to-router traffic froze about every 10 seconds for several seconds and occasionally lost data. The reported fix combined explicit destination addressing with JV=1 and NW=10.
Identify the Direction-Specific Failure
Test each direction separately. In this case, only coordinator-to-router traffic stalled; router-to-coordinator traffic remained reliable. The failure occurred while manually typing console text, so the available evidence does not support buffer overflow as the cause.
The evidence does not identify a firmware version or establish a definitive root cause. Treat the periodic freeze as the observed symptom rather than proof of a specific internal network or serial fault.
Configure Coordinator Destination Addressing
Set the coordinator destination fields to the router serial-number fields. Copy the router values exactly; do not substitute assumed addresses.
| Coordinator field | Value source |
|---|---|
DH |
Router SH
|
DL |
Router SL
|
Apply the Settings That Resolved the Freezing
- Configure one adapter as the coordinator and the other as the router.
- Read
SHandSLfrom the router. - Write the router's
SHvalue to coordinatorDH, and routerSLto coordinatorDL. - Set
JV=1andNW=10. The evidence does not specify whether these settings were applied to one adapter or both, so verify the intended scope in the configuration interface or product documentation. - Save the configuration, restart or reconnect the adapters as required by the configuration method, and repeat bidirectional testing.
Destination-address changes alone did not resolve the reported problem and sometimes left the nodes unable to see each other. Adding JV=1 and NW=10 resolved the reported failures.
Verify the Wireless Serial Link
Send continuous test data from router to coordinator, then coordinator to router. Monitor the previously failing direction for freezes, missing characters, and loss of node visibility. The source confirms success only for the described console-typing test; validate the adapters again with the actual connected equipment, traffic pattern, and half-duplex control behavior before deployment.
FAQ
How do I address an XBee 232 coordinator to its router?
Set coordinator DH equal to router SH and coordinator DL equal to router SL.
What settings stopped the XBee 232 link from freezing every 10 seconds?
The reported resolution was to use the matching DH/DL destination address and also set JV=1 and NW=10.
Why does my XBee 232 link work in only one direction?
Check each direction independently and verify the coordinator destination address against the router's SH and SL. If the symptom matches this case, also verify JV=1 and NW=10; the evidence does not establish a firmware-specific root cause.