ESP32 host(gateway) report OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure(esp32h2 is rcp device) (IDFGH-13109)

[wensenl]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

esp-idf-v5.1.4

Espressif SoC revision.

ESP32/ESP32H2

Operating System used.

macOS

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

None

Development Kit.

Self developed motherboard（base ）

Power Supply used.

External 5V

What is the expected behavior?

Hope there is no error（OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure） reported.

What is the actual behavior?

Steps to reproduce.

1. gateway host is esp32，rcp is esp32h2，gateway is zigbee ESP_ZB_DEVICE_TYPE_COORDINATOR. rcp is esp-idf-v5.1.4/examples/openthread/ot_rcp
2. Zigbee device is esp32h2. Zigbee device is ESP_ZB_DEVICE_TYPE_ROUTER. Networking of 4 Zigbee devices.
3. When they are working, the gateway randomly prints the following error. error is:
   W(822185) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
   [comm_mqtt.c:134]^heartbeat response
   W(832285) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
4. The further away the gateway and device are from each other, the more errors will be printed

Debug Logs.

[comm_mqtt.c:154]^puback, packet id: 168

[comm_mqtt.c:134]^heartbeat response

W(1483125) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
W(1488485) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
connect error, errno: 113
success to establish tcp, fd=0
W (1497925) ESP_ZB_GATEWAY: Network(0x02f3) closed, devices joining not allowed.
W (1497945) ESP_ZB_GATEWAY: Network(0x02f3) is open for 180 seconds
W(1497975) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
W(1498485) OPENTHREAD:[W] P-RadioSpinel-: Handle transmit done failed: ChannelAccessFailure
W (1498505) ESP_ZB_GATEWAY: Network(0x02f3) is open for 180 seconds
[comm_mqtt.c:134]^heartbeat response

_core_sysdep_network_tcp_send, nwk select timeout
[comm_mqtt.c:89]^[1500.550][LK-0315] MQTT connect packet send timeout: 5000

More Information.

No response

[gytxxsy]

A fix is missing in v5.1.4 and you can switch to release/v5.1 to resolve this issue. If you do not want to switch to the branch, you can manually add a line of code to fix the problem:
https://github.com/espressif/esp-idf/blob/release/v5.1/components/openthread/src/spinel/esp_radio_spinel.cpp#L272

Of course, if you want to manually add a line of code, you need to set CONFIG_OPENTHREAD_MAC_MAX_CSMA_BACKOFFS_DIRECT to a specific number (recommended setting is 4) because this macro is not added in esp-idf-v5.1.4. For example:

s_transmit_frame.mInfo.mTxInfo.mMaxCsmaBackoffs = 4;

[chshu]

@wensenl Hope #14056 (comment) resolved your issue, feel free to reopen if any follow up questions.