Hello guys,
before opening an issue on Github I would like to ask the community whether this issue is already known.
I got curious about the new OpenThread implementation in ESPHome and used this as an excuse to buy another ZBDongle-E to use with the ESP32-H2 I already have.
I flashed the Thread RCP firmware onto the ZBDongle-E and installed the OT Border Router Addon onto my HAOS installatiion.
Everything seems to work fine, the Addon is up and HA has detected the Border Router.
I extracted the Thread network details from HA and configured ESPHome with that.
Unfortunately I keep getting the following error message:
E (809) OPENTHREAD: esp_openthread_auto_start(144): Cannot convert OpenThread pre-shared commissioner key
I already tried to configure the Thread network details via TLV and each detail individually like its described in the documentation.
My ESPHome config is minimal, see below (changed all secrets):
esphome:
name: "threadtest"
friendly_name: ThreadTest
esp32:
board: esp32-h2-devkitm-1
framework:
type: esp-idf
network:
enable_ipv6: true
openthread:
channel: 15
network_name: ha-thread-7c63
network_key: 0xcb3017cd1f04780fe13d9cf09868cf07
pan_id: 0x7c63
ext_pan_id: 0xac0c5f513aa872832
pskc: 0x059830cc6db739dc7f17b14dae895c14
force_dataset: true
Current versions in use:
ot-rcp-v2.4.5.0-zbdonglee-460800.gbl
HA 2025.6.3 on HAOS 15.2
OT Border Router Addon 2.13.0
ESPHome 2025.6.2 - ESP-IDF 5.3.2
Logs from the ESP:
[21:09:06]ESP-ROM:esp32h2-20221101
[21:09:06]Build:Nov 1 2022
[21:09:06]rst:0xc (SW_CPU),boot:0xc (SPI_FAST_FLASH_BOOT)
[21:09:06]Saved PC:0x400031b6
[21:09:06]SPIWP:0xee
[21:09:06]mode:DIO, clock div:1
[21:09:06]load:0x408460e0,len:0x1894
[21:09:06]load:0x4083cad0,len:0xf20
[21:09:06]load:0x4083efd0,len:0x2dc0
[21:09:06]entry 0x4083cad0
[21:09:06]I (27) boot: ESP-IDF 5.3.2 2nd stage bootloader
[21:09:06]I (27) boot: compile time Jun 29 2025 19:03:17
[21:09:06]I (29) boot: chip revision: v0.1
[21:09:06]I (30) boot: efuse block revision: v0.2
[21:09:06]I (34) boot.esp32h2: SPI Speed : 64MHz
[21:09:06]I (39) boot.esp32h2: SPI Mode : DIO
[21:09:06]I (44) boot.esp32h2: SPI Flash Size : 4MB
[21:09:06]I (48) boot: Enabling RNG early entropy source...
[21:09:06]I (54) boot: Partition Table:
[21:09:06]I (57) boot: ## Label Usage Type ST Offset Length
[21:09:06]I (65) boot: 0 otadata OTA data 01 00 00009000 00002000
[21:09:06]I (72) boot: 1 phy_init RF data 01 01 0000b000 00001000
[21:09:06]I (80) boot: 2 app0 OTA app 00 10 00010000 001c0000
[21:09:06]I (87) boot: 3 app1 OTA app 00 11 001d0000 001c0000
[21:09:06]I (94) boot: 4 nvs WiFi data 01 02 00390000 0006d000
[21:09:06]I (102) boot: End of partition table
[21:09:06]I (107) esp_image: segment 0: paddr=00010020 vaddr=420b0020 size=24aa4h (150180) map
[21:09:06]I (176) esp_image: segment 1: paddr=00034acc vaddr=40800000 size=0b54ch ( 46412) load
[21:09:06]I (200) esp_image: segment 2: paddr=00040020 vaddr=42000020 size=a3558h (669016) map
[21:09:06]I (473) esp_image: segment 3: paddr=000e3580 vaddr=4080b54c size=00fb0h ( 4016) load
[21:09:06]I (477) esp_image: segment 4: paddr=000e4538 vaddr=4080c500 size=01b80h ( 7040) load
[21:09:06]I (490) boot: Loaded app from partition at offset 0x10000
[21:09:06]I (491) boot: Disabling RNG early entropy source...
[21:09:06]I (503) cpu_start: Unicore app
[21:09:06]I (512) cpu_start: Pro cpu start user code
[21:09:06]I (512) cpu_start: cpu freq: 96000000 Hz
[21:09:06]I (513) app_init: Application information:
[21:09:06]I (515) app_init: Project name: threadtest
[21:09:06]I (520) app_init: App version: 2025.6.2
[21:09:06]I (525) app_init: Compile time: Jun 29 2025 18:59:57
[21:09:06]I (531) app_init: ELF file SHA256: 6b9f3a14a...
[21:09:06]I (536) app_init: ESP-IDF: 5.3.2
[21:09:06]I (541) efuse_init: Min chip rev: v0.0
[21:09:06]I (546) efuse_init: Max chip rev: v0.99
[21:09:06]I (551) efuse_init: Chip rev: v0.1
[21:09:06]I (555) heap_init: Initializing. RAM available for dynamic allocation:
[21:09:06]I (563) heap_init: At 40816A20 len 00036960 (218 KiB): RAM
[21:09:06]I (569) heap_init: At 4084D380 len 00002B60 (10 KiB): RAM
[21:09:06]I (576) spi_flash: detected chip: generic
[21:09:06]I (580) spi_flash: flash io: dio
[21:09:06]I (584) sleep: Configure to isolate all GPIO pins in sleep state
[21:09:06]I (590) sleep: Enable automatic switching of GPIO sleep configuration
[21:09:06]I (598) main_task: Started on CPU0
[21:09:06]I (625) main_task: Calling app_main()
[21:09:06]I (747) main_task: Returned from app_main()
[21:09:06]I (757) OPENTHREAD: Host connection mode none
[21:09:06]I (768) phy: phy_version: 310,2, 463a420, Aug 15 2024, 18:52:11
[21:09:06]I (769) phy: libbtbb version: a024da6, Aug 15 2024, 18:52:23
[21:09:06]I(778) OPENTHREAD:[I] CslTxScheduler: Bus TX Time: 0 usec, Latency: 0 usec. Calculated CSL Frame Request Ahead: 20000 usec
[21:09:06]I(783) OPENTHREAD:[I] ChildSupervsn-: Timeout: 0 -> 190
[21:09:06]I (789) OPENTHREAD: OpenThread attached to netif
[21:09:06]E (796) OPENTHREAD: esp_openthread_auto_start(144): Cannot convert OpenThread pre-shared commissioner key
[21:09:06]ESP_ERROR_CHECK failed: esp_err_t 0xffffffff (ESP_FAIL) at 0x42008fb0
[21:09:06]file: "src/esphome/components/openthread/openthread_esp.cpp" line 120
[21:09:06]func: void esphome::openthread::OpenThreadComponent::ot_main()
[21:09:06]expression: esp_openthread_auto_start((error == OT_ERROR_NONE) ? &dataset : NULL)
[21:09:06]
[21:09:06]abort() was called at PC 0x40805f31 on core 0
Any ideas?
Thanks in advance!