Firmware Migration Scope
The modem is an XBee Pro 2.4 GHz unit being migrated from the 802.15.4 firmware to XBP24-DM DigiMesh firmware. Preserve the source and target selections during troubleshooting; changing additional settings would make it harder to isolate the communication failure.
| State | Protocol or firmware family | Firmware |
|---|---|---|
| Before migration | 802.15.4 | 10CD |
| Migration target | XBP24-DM DigiMesh | 8003 |
Failure Signature and Known Limitation
The write can stop with “Unable to Communicate with COM Port” followed by “Write Parameters…Failed.” The evidence confirms an intermittent write failure but does not establish whether the COM port, development board, modem reset state, or firmware transition is the root cause.
A reset during the initial upgrade interval successfully recovered the reported Series 1 write problem. Treat this as a confirmed workaround for the described development-board setup, not as proof of the underlying cause or a universal procedure for every XBee model.
Development-Board Recovery Procedure
- Connect the modem through the development board and select XBP24-DM firmware 8003 as the write target.
- Start the firmware upgrade.
- Watch the development-board indicators. When a light turns on for the few-second interval observed at the start of the upgrade, press the board’s reset button during that interval.
- Allow the firmware operation to continue and check whether the write completes without the COM-port and parameter-write failure messages.
Verification and Escalation Data
Verify that the programming application reports a completed write and that the modem now identifies the selected XBP24-DM firmware 8003. If the failure remains intermittent, record the exact stage at which it occurs, whether the indicator illuminated, and whether reset was pressed during that interval. The available evidence does not specify COM-port settings, development-board model, software version, or another supported recovery sequence, so do not substitute guessed values.
FAQ
How do I recover an XBee Pro firmware write that says Unable to Communicate with COM Port?
On the reported development-board setup, start the upgrade and press the reset button while a board light is illuminated for a few seconds near the beginning. Then confirm that the write proceeds without “Write Parameters…Failed.”
Can XBee Pro firmware 10CD be changed to DigiMesh firmware 8003?
The reported migration was from 802.15.4 firmware 10CD to XBP24-DM DigiMesh firmware 8003, and the firmware was ultimately written successfully using the reset workaround.
What causes the XBP24-DM 8003 parameter-write failure?
The evidence does not identify a root cause. It only confirms that timing a development-board reset during the initial indicator-light interval allowed the write to complete.