host_performs_slave_ota: Failed to activate OTA (using partition-method) (EHM-116)

[Justin08784]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

c6 should boot into the newest firmware (esp_hosted slave example v2.6.0) that has been conveyed via OTA (using the partition-method in the "host_performs_slave_ota" example).

Actual behavior (suspected bug)

c6 does NOT boot into the newest firmware that has been conveyed via OTA.

The following RPC fails ret = esp_hosted_slave_ota_activate();, resulting in the following error message in the log: E (12843) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED.

HW: Firebeetle 2 (esp32p4 with esp32c6 wifi coprocessor)

Error logs or terminal output

Uh what happened? Did the slave activate the new fw? (2.6.0)

Leaving...
Hard resetting via RTS pin...
Executing action: monitor
Running idf_monitor in directory /Users/shinej/umich-cs/eecs473/host_performs_slave_ota
Executing "/Users/shinej/.espressif/python_env/idf5.5_py3.13_env/bin/python /Users/shinej/umich-cs/eecs473/esp-idf-v5.5.1/tools/idf_monitor.py -p /dev/cu.usbmodem1401 -b 115200 --toolchain-prefix riscv32-esp-elf- --target esp32p4 --revision 1 --decode-panic backtrace /Users/shinej/umich-cs/eecs473/host_performs_slave_ota/build/host_performs_slave_ota.elf /Users/shinej/umich-cs/eecs473/host_performs_slave_ota/build/bootloader/bootloader.elf -m '/Users/shinej/.espressif/python_env/idf5.5_py3.13_env/bin/python' '/Users/shinej/umich-cs/eecs473/esp-idf-v5.5.1/tools/idf.py'"...
--- esp-idf-monitor 1.8.0 on /dev/cu.usbmodem1401 115200
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
I (299) app_init: CompiESP-ROM:esp32p4-eco2-20240710
Build:Jul 10 2024
rst:0x17 (CHIP_USB_UART_RESET),boot:0xc (SPI_FAST_FLASH_BOOT)
Core0 Saved PC:0x4fc1c31c
Core1 Saved PC:0x4fc012ca
SPI mode:DIO, clock div:1
load:0x4ff33ce0,len:0x164c
load:0x4ff29ed0,len:0xdfc
--- 0x4ff29ed0: esp_bootloader_get_description at /Users/shinej/umich-cs/eecs473/esp-idf-v5.5.1/components/esp_bootloader_format/esp_bootloader_desc.c:39
load:0x4ff2cbd0,len:0x336c
--- 0x4ff2cbd0: esp_flash_encryption_enabled at /Users/shinej/umich-cs/eecs473/esp-idf-v5.5.1/components/bootloader_support/src/flash_encrypt.c:89
entry 0x4ff29eda
--- 0x4ff29eda: call_start_cpu0 at /Users/shinej/umich-cs/eecs473/esp-idf-v5.5.1/components/bootloader/subproject/main/bootloader_start.c:25
I (27) boot: ESP-IDF v5.5.1 2nd stage bootloader
I (28) boot: compile time Oct 16 2025 06:42:03
I (28) boot: Multicore bootloader
I (29) boot: chip revision: v1.0
I (30) boot: efuse block revision: v0.3
I (34) boot.esp32p4: SPI Speed      : 80MHz
I (38) boot.esp32p4: SPI Mode       : DIO
I (42) boot.esp32p4: SPI Flash Size : 8MB
I (45) boot: Enabling RNG early entropy source...
I (50) boot: Partition Table:
I (52) boot: ## Label            Usage          Type ST Offset   Length
I (59) boot:  0 nvs              WiFi data        01 02 00009000 00004000
I (65) boot:  1 otadata          OTA data         01 00 0000d000 00002000
I (72) boot:  2 phy_init         RF data          01 01 0000f000 00001000
I (78) boot:  3 ota_0            OTA app          00 10 00010000 00200000
I (85) boot:  4 ota_1            OTA app          00 11 00210000 00200000
I (91) boot:  5 storage          Unknown data     01 83 00410000 001e0000
I (98) boot:  6 slave_fw         Unknown data     01 40 005f0000 00200000
I (105) boot: End of partition table
I (109) esp_image: segment 0: paddr=00010020 vaddr=40050020 size=2c704h (182020) map
I (141) esp_image: segment 1: paddr=0003c72c vaddr=30100000 size=00044h (    68) load
I (143) esp_image: segment 2: paddr=0003c778 vaddr=4ff00000 size=038a0h ( 14496) load
I (148) esp_image: segment 3: paddr=00040020 vaddr=40000020 size=4f22ch (324140) map
I (198) esp_image: segment 4: paddr=0008f254 vaddr=4ff038a0 size=0d1a8h ( 53672) load
I (209) esp_image: segment 5: paddr=0009c404 vaddr=4ff10a80 size=02750h ( 10064) load
I (215) boot: Loaded app from partition at offset 0x10000
I (216) boot: Disabling RNG early entropy source...
I (229) cpu_start: Multicore app
--- Error: read failed: [Errno 6] Device not configured
--- Waiting for the device to reconnect
I (1635) sdio_wrapper: SDIO master: Slot 1, Data-Lines: 4-bit Freq(KHz)[40000 KHz]
I (1635) sdio_wrapper: GPIOs: CLK[18] CMD[19] D0[14] D1[15] D2[16] D3[17] Slave_Reset[54]
I (1639) sdio_wrapper: Queues: Tx[20] Rx[20] SDIO-Rx-Mode[1]
Name:
Type: SDIO
Speed: 40.00 MHz (limit: 40.00 MHz)
Size: 0MB
CSD: ver=1, sector_size=0, capacity=0 read_bl_len=0
SCR: sd_spec=0, bus_width=0
TUPLE: DEVICE, size: 3: D9 01 FF
TUPLE: MANFID, size: 4
  MANF: 0092, CARD: 6666
TUPLE: FUNCID, size: 2: 0C 00
TUPLE: FUNCE, size: 4: 00 00 02 32
TUPLE: CONFIG, size: 5: 01 01 00 02 07
TUPLE: CFTABLE_ENTRY, size: 8
  INDX: C1, Intface: 1, Default: 1, Conf-Entry-Num: 1
  IF: 41
  FS: 30, misc: 0, mem_space: 1, irq: 1, io_space: 0, timing: 0, power: 0
  IR: 30, mask: 1,   IRQ: FF FF
  LEN: FFFF
TUPLE: END
I (1717) sdio_wrapper: Function 0 Blocksize: 512
I (1721) sdio_wrapper: Function 1 Blocksize: 512
I (1725) H_SDIO_DRV: Card init success, TRANSPORT_RX_ACTIVE
I (1731) transport: set_transport_state: 1
I (1734) transport: Waiting for esp_hosted slave to be ready
I (1804) H_SDIO_DRV: SDIO Host operating in STREAMING MODE
I (1804) H_SDIO_DRV: Open data path at slave
I (1804) H_SDIO_DRV: Starting SDIO process rx task
I (1832) H_SDIO_DRV: Received ESP_PRIV_IF type message
I (1832) transport: Received INIT event from ESP32 peripheral
I (1832) transport: EVENT: 12
I (1834) transport: Identified slave [esp32c6]
I (1838) transport: EVENT: 11
I (1840) transport: capabilities: 0xd
I (1844) transport: Features supported are:
I (1848) transport: 	 * WLAN
I (1850) transport: 	   - HCI over SDIO
I (1854) transport: 	   - BLE only
I (1857) transport: EVENT: 13
W (1860) transport: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (1878) transport: === ESP-Hosted Version Warning ===
I (1883) transport: ESP board type is : 13

I (1887) transport: Base transport is set-up, TRANSPORT_TX_ACTIVE
I (1893) H_API: Transport active
I (1896) transport: Slave chip Id[12]
I (1899) transport: raw_tp_dir[-], flow_ctrl: low[60] high[80]
I (1904) transport: transport_delayed_init
I (1908) esp_cli: Remove any existing deep_sleep cmd in cli
I (1914) esp_cli: Registering command: crash
I (1918) esp_cli: Registering command: reboot
I (1922) esp_cli: Registering command: mem-dump
I (1926) esp_cli: Registering command: task-dump
I (1930) esp_cli: Registering command: cpu-dump
I (1934) esp_cli: Registering command: heap-trace
I (1939) esp_cli: Registering command: sock-dump
I (1943) esp_cli: Registering command: host-power-save
I (1948) hci_stub_drv: Host BT Support: Disabled
I (1952) H_SDIO_DRV: Received INIT event
I (1956) H_SDIO_DRV: Event type: 0x22
I (1959) H_SDIO_DRV: Write thread started
I (1963) host_performs_slave_ota: ESP-Hosted initialized successfully
I (2407) host_performs_slave_ota: Host firmware version: 2.6.0
I (2407) host_performs_slave_ota: Slave firmware version: 2.5.12
W (2408) host_performs_slave_ota: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (2427) host_performs_slave_ota: === ESP-Hosted Version Warning ===
I (2433) host_performs_slave_ota: Using Partition OTA method
I (2438) ota_partition: Starting Partition OTA from partition: slave_fw
I (2445) ota_partition: Found partition: slave_fw, size: 2097152 bytes
I (2451) ota_partition: Image header: magic=0xe9, segment_count=5, hash_appended=1
I (2458) ota_partition: Segment 0: data_len=305556, load_addr=0x420e0020
I (2465) ota_partition: Found app description: version='2.6.0', project_name='network_adapter'
I (2473) ota_partition: Segment 1: data_len=22108, load_addr=0x40800000
I (2479) ota_partition: Segment 2: data_len=893192, load_addr=0x42000020
I (2486) ota_partition: Segment 3: data_len=112024, load_addr=0x4080565c
I (2492) ota_partition: Segment 4: data_len=14524, load_addr=0x40820c00
I (2499) ota_partition: Total image size: 1347505 bytes
I (2503) ota_partition: Firmware verified - Size: 1347505 bytes, Version: 2.6.0
I (2512) ota_partition: Current slave firmware version: 2.5.12
I (2516) ota_partition: New slave firmware version: 2.6.0
I (2521) ota_partition: Version differs - proceeding with OTA from 2.5.12 to 2.6.0
I (2528) ota_partition: Proceeding with OTA - Firmware size: 1347505 bytes
E (12829) rpc_rsp: OTA write failed
I (12829) ota_partition: Partition OTA completed successfully - Sent 1347505 bytes
I (12830) host_performs_slave_ota: OTA completed successfully
E (12843) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED
I (12844) main_task: Returned from app_main()

Steps to reproduce the behavior

Get c6 firmware: idf.py create-project-from-example "espressif/esp_hosted=2.6.0:slave"
Get host_performs_slave_ota example: idf.py create-project-from-example "espressif/esp_hosted:host_performs_slave_ota"

Move slave "network_adapter.bin" into host_performs_slave_ota/... and follow the steps for partition method exactly.

Project release version

latest

System architecture

ARM 64-bit (Apple M1/M2, Raspberry Pi 4/5)

Operating system

MacOS

Operating system version

Sequoia 15.3.1

Shell

ZSH

Additional context

No response

[mantriyogesh]

Hello @Justin08784 ,

This is expected problem, as the older esp-hosted slave firmwares did not support the new esp_hosted_slave_ota_activate() api. however, old slaves auto reboot after receiving esp_hosted_slave_ota_end(). So now if you check the slave log, it would have already upgraded to 2.6.0. Can you please confirm?

E (12843) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED

can be ignored only for this transition.

but i am still concerned for

E (12829) rpc_rsp: OTA write failed

can you please send both side logs?

[mantriyogesh]

c6 does NOT boot into the newest firmware that has been conveyed via OTA.

I see. let me reproduce this.

[mantriyogesh]

c6 does NOT boot into the newest firmware that has been conveyed via OTA.

This seems serious. Ideally C6 should have booted from other partition if failure sensed.
Can you please just reset the P4 by On/Off switch?

What is the log on P4 on bootup (after this failed attempt)?

[Justin08784]

Yes of course. Here I flash the ota program to the host and do a single continuous monitor. I disconnect usb power to the Firebeetle at --- Waiting for the device to reconnect......, and the reconnect it immediately after. As you can see, the version on the c6 has stayed at 2.5.12.

user@macbook host_performs_slave_ota % idf.py flash monitor
Executing action: flash
Serial port /dev/cu.usbmodem11401
Connecting...
Detecting chip type... ESP32-P4
Running ninja in directory /path/to/host/host_performs_slave_ota/build
Executing "ninja flash"...
[1/7] Partition OTA: Dynamically selecting newest firmware
-- Partition: Dynamically searching for newest firmware...
-- Partition: Searching in /path/to/host/host_performs_slave_ota/components/ota_partition/slave_fw_bin
-- Partition: File /path/to/host/host_performs_slave_ota/components/ota_partition/slave_fw_bin/network_adapter.bin timestamp: 1760611194
-- Partition: Selected newest firmware: network_adapter.bin
-- Partition: Saved firmware selection for partition flashing
-- Partition: Firmware selection completed
[2/7] cd /path/to/host/host_perf...forms_slave_ota/build/host_performs_slave_ota.bin
host_performs_slave_ota.bin binary size 0x94490 bytes. Smallest app partition is 0x200000 bytes. 0x16bb70 bytes (71%) free.
[1/1] cd /path/to/host/host_perf...erforms_slave_ota/build/bootloader/bootloader.bin
Bootloader binary size 0x5810 bytes. 0x7f0 bytes (8%) free.
[6/7] Partition OTA: Flashing selected firmware to partition
-- -----------------------------------------------------
-- Partition: Flashing network_adapter.bin
-- Path: /path/to/host/host_performs_slave_ota/components/ota_partition/slave_fw_bin/network_adapter.bin
-- Offset: 0x5F0000
-- -----------------------------------------------------
-- esptool.py v4.10.0
Found 2 serial ports
Serial port /dev/cu.usbmodem11401
Connecting...
Detecting chip type... ESP32-P4
Chip is ESP32-P4 (revision v1.0)
Features: High-Performance MCU
Crystal is 40MHz
USB mode: USB-Serial/JTAG
MAC: xx:xx:xx:xx:xx:xx
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 2000000
Changed.
Configuring flash size...
Flash will be erased from 0x005f0000 to 0x00738fff...
Compressed 1347504 bytes to 809032...
Writing at 0x00734aca... (100 %)
Wrote 1347504 bytes (809032 compressed) at 0x005f0000 in 10.2 seconds (effective 1060.2 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
-- ✅ Successfully flashed network_adapter.bin to partition!
[6/7] cd /path/to/host/esp-idf-v...5.5.1/components/esptool_py/run_serial_tool.cmake
esptool.py --chip esp32p4 -p /dev/cu.usbmodem11401 -b 460800 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 8MB 0x2000 bootloader/bootloader.bin 0x10000 host_performs_slave_ota.bin 0x8000 partition_table/partition-table.bin 0xd000 ota_data_initial.bin
esptool.py v4.10.0
Serial port /dev/cu.usbmodem11401
Connecting....
Chip is ESP32-P4 (revision v1.0)
Features: High-Performance MCU
Crystal is 40MHz
USB mode: USB-Serial/JTAG
MAC: xx:xx:xx:xx:xx:xx
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800
Changed.
Configuring flash size...
Flash will be erased from 0x00002000 to 0x00007fff...
Flash will be erased from 0x00010000 to 0x000a4fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000d000 to 0x0000efff...
SHA digest in image updated
Compressed 22544 bytes to 13851...
Writing at 0x00002000... (100 %)
Wrote 22544 bytes (13851 compressed) at 0x00002000 in 0.4 seconds (effective 446.7 kbit/s)...
Hash of data verified.
Compressed 607376 bytes to 273089...
Writing at 0x0009e00d... (100 %)
Wrote 607376 bytes (273089 compressed) at 0x00010000 in 4.7 seconds (effective 1042.2 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 158...
Writing at 0x00008000... (100 %)
Wrote 3072 bytes (158 compressed) at 0x00008000 in 0.1 seconds (effective 422.9 kbit/s)...
Hash of data verified.
Compressed 8192 bytes to 31...
Writing at 0x0000d000... (100 %)
Wrote 8192 bytes (31 compressed) at 0x0000d000 in 0.1 seconds (effective 579.3 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
Executing action: monitor
Running idf_monitor in directory /path/to/host/host_performs_slave_ota
Executing "/Users/user/.espressif/python_env/idf5.5_py3.13_env/bin/python /path/to/host/esp-idf-v5.5.1/tools/idf_monitor.py -p /dev/cu.usbmodem11401 -b 115200 --toolchain-prefix riscv32-esp-elf- --target esp32p4 --revision 1 --decode-panic backtrace /path/to/host/host_performs_slave_ota/build/host_performs_slave_ota.elf /path/to/host/host_performs_slave_ota/build/bootloader/bootloader.elf -m '/Users/user/.espressif/python_env/idf5.5_py3.13_env/bin/python' '/path/to/host/esp-idf-v5.5.1/tools/idf.py'"...
--- esp-idf-monitor 1.8.0 on /dev/cu.usbmodem11401 115200
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H

I (291) cpu_start: cpu freq: 360000000 Hz
I (291) app_init: Application information:
I (292) app_ESP-ROM:esp32p4-eco2-20240710
Build:Jul 10 2024
rst:0x17 (CHIP_USB_UART_RESET),boot:0xc (SPI_FAST_FLASH_BOOT)
Core0 Saved PC:0x4fc1c31a
Core1 Saved PC:0x4fc012cc
SPI mode:DIO, clock div:1
load:0x4ff33ce0,len:0x164c
load:0x4ff29ed0,len:0xdfc
--- 0x4ff29ed0: esp_bootloader_get_description at /path/to/host/esp-idf-v5.5.1/components/esp_bootloader_format/esp_bootloader_desc.c:39
load:0x4ff2cbd0,len:0x336c
--- 0x4ff2cbd0: esp_flash_encryption_enabled at /path/to/host/esp-idf-v5.5.1/components/bootloader_support/src/flash_encrypt.c:89
entry 0x4ff29eda
--- 0x4ff29eda: call_start_cpu0 at /path/to/host/esp-idf-v5.5.1/components/bootloader/subproject/main/bootloader_start.c:25
I (27) boot: ESP-IDF v5.5.1 2nd stage bootloader
I (28) boot: compile time Oct 16 2025 06:42:03
I (28) boot: Multicore bootloader
I (29) boot: chip revision: v1.0
I (30) boot: efuse block revision: v0.3
I (34) boot.esp32p4: SPI Speed      : 80MHz
I (38) boot.esp32p4: SPI Mode       : DIO
I (42) boot.esp32p4: SPI Flash Size : 8MB
I (45) boot: Enabling RNG early entropy source...
I (50) boot: Partition Table:
I (52) boot: ## Label            Usage          Type ST Offset   Length
I (59) boot:  0 nvs              WiFi data        01 02 00009000 00004000
I (65) boot:  1 otadata          OTA data         01 00 0000d000 00002000
I (72) boot:  2 phy_init         RF data          01 01 0000f000 00001000
I (78) boot:  3 ota_0            OTA app          00 10 00010000 00200000
I (85) boot:  4 ota_1            OTA app          00 11 00210000 00200000
I (91) boot:  5 storage          Unknown data     01 83 00410000 001e0000
I (98) boot:  6 slave_fw         Unknown data     01 40 005f0000 00200000
I (105) boot: End of partition table
I (109) esp_image: segment 0: paddr=00010020 vaddr=40060020 size=2d7f4h (186356) map
I (142) esp_image: segment 1: paddr=0003d81c vaddr=30100000 size=00044h (    68) load
I (144) esp_image: segment 2: paddr=0003d868 vaddr=4ff00000 size=027b0h ( 10160) load
I (148) esp_image: segment 3: paddr=00040020 vaddr=40000020 size=534f8h (341240) map
I (201) esp_image: segment 4: paddr=00093520 vaddr=4ff027b0 size=0e78ch ( 59276) load
I (213) esp_image: segment 5: paddr=000a1cb4 vaddr=4ff10f80 size=027b0h ( 10160) load
I (219) boot: Loaded app from partition at offset 0x10000
I (220) boot: Disabling RNG early entropy source...
I (233) cpu_start: Multicore app
--- Error: read failed: [Errno 6] Device not configured
--- Waiting for the device to reconnect
I (1635) sdio_wrapper: SDIO master: Slot 1, Data-Lines: 4-bit Freq(KHz)[40000 KHz]
I (1635) sdio_wrapper: GPIOs: CLK[18] CMD[19] D0[14] D1[15] D2[16] D3[17] Slave_Reset[54]
I (1639) sdio_wrapper: Queues: Tx[20] Rx[20] SDIO-Rx-Mode[1]
Name:
Type: SDIO
Speed: 40.00 MHz (limit: 40.00 MHz)
Size: 0MB
CSD: ver=1, sector_size=0, capacity=0 read_bl_len=0
SCR: sd_spec=0, bus_width=0
TUPLE: DEVICE, size: 3: D9 01 FF
TUPLE: MANFID, size: 4
  MANF: 0092, CARD: 6666
TUPLE: FUNCID, size: 2: 0C 00
TUPLE: FUNCE, size: 4: 00 00 02 32
TUPLE: CONFIG, size: 5: 01 01 00 02 07
TUPLE: CFTABLE_ENTRY, size: 8
  INDX: C1, Intface: 1, Default: 1, Conf-Entry-Num: 1
  IF: 41
  FS: 30, misc: 0, mem_space: 1, irq: 1, io_space: 0, timing: 0, power: 0
  IR: 30, mask: 1,   IRQ: FF FF
  LEN: FFFF
TUPLE: END
I (1717) sdio_wrapper: Function 0 Blocksize: 512
I (1721) sdio_wrapper: Function 1 Blocksize: 512
I (1725) H_SDIO_DRV: Card init success, TRANSPORT_RX_ACTIVE
I (1731) transport: set_transport_state: 1
I (1734) transport: Waiting for esp_hosted slave to be ready
I (1804) H_SDIO_DRV: SDIO Host operating in STREAMING MODE
I (1804) H_SDIO_DRV: Open data path at slave
I (1804) H_SDIO_DRV: Starting SDIO process rx task
I (1832) H_SDIO_DRV: Received ESP_PRIV_IF type message
I (1832) transport: Received INIT event from ESP32 peripheral
I (1832) transport: EVENT: 12
I (1834) transport: Identified slave [esp32c6]
I (1838) transport: EVENT: 11
I (1840) transport: capabilities: 0xd
I (1844) transport: Features supported are:
I (1848) transport:      * WLAN
I (1850) transport:        - HCI over SDIO
I (1854) transport:        - BLE only
I (1857) transport: EVENT: 13
W (1860) transport: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (1878) transport: === ESP-Hosted Version Warning ===
I (1883) transport: ESP board type is : 13

I (1887) transport: Base transport is set-up, TRANSPORT_TX_ACTIVE
I (1893) H_API: Transport active
I (1896) transport: Slave chip Id[12]
I (1899) transport: raw_tp_dir[-], flow_ctrl: low[60] high[80]
I (1905) transport: transport_delayed_init
I (1908) esp_cli: Remove any existing deep_sleep cmd in cli
I (1914) esp_cli: Registering command: crash
I (1918) esp_cli: Registering command: reboot
I (1922) esp_cli: Registering command: mem-dump
I (1926) esp_cli: Registering command: task-dump
I (1930) esp_cli: Registering command: cpu-dump
I (1935) esp_cli: Registering command: heap-trace
I (1939) esp_cli: Registering command: sock-dump
I (1943) esp_cli: Registering command: host-power-save
I (1948) hci_stub_drv: Host BT Support: Disabled
I (1953) H_SDIO_DRV: Received INIT event
I (1956) H_SDIO_DRV: Event type: 0x22
I (1960) H_SDIO_DRV: Write thread started
I (1963) host_performs_slave_ota: ESP-Hosted initialized successfully
I (2407) host_performs_slave_ota: Host firmware version: 2.6.0
I (2407) host_performs_slave_ota: Slave firmware version: 2.5.12
W (2408) host_performs_slave_ota: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (2427) host_performs_slave_ota: === ESP-Hosted Version Warning ===
I (2433) host_performs_slave_ota: Using Partition OTA method
I (2438) ota_partition: Starting Partition OTA from partition: slave_fw
I (2445) ota_partition: Found partition: slave_fw, size: 2097152 bytes
I (2451) ota_partition: Image header: magic=0xe9, segment_count=5, hash_appended=1
I (2458) ota_partition: Segment 0: data_len=305556, load_addr=0x420e0020
I (2465) ota_partition: Found app description: version='2.6.0', project_name='network_adapter'
I (2473) ota_partition: Segment 1: data_len=22108, load_addr=0x40800000
I (2479) ota_partition: Segment 2: data_len=893192, load_addr=0x42000020
I (2486) ota_partition: Segment 3: data_len=112024, load_addr=0x4080565c
I (2492) ota_partition: Segment 4: data_len=14524, load_addr=0x40820c00
I (2499) ota_partition: Total image size: 1347505 bytes
I (2503) ota_partition: Firmware verified - Size: 1347505 bytes, Version: 2.6.0
I (2512) ota_partition: Current slave firmware version: 2.5.12
I (2516) ota_partition: New slave firmware version: 2.6.0
I (2521) ota_partition: Version differs - proceeding with OTA from 2.5.12 to 2.6.0
I (2528) ota_partition: Proceeding with OTA - Firmware size: 1347505 bytes
E (12842) rpc_rsp: OTA write failed
I (12842) ota_partition: Partition OTA completed successfully - Sent 1347505 bytes
I (12842) host_performs_slave_ota: OTA completed successfully
E (12856) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED
I (12856) main_task: Returned from app_main()
--- Error: read failed: [Errno 6] Device not configured
--- Waiting for the device to reconnect......
I (1629) sdio_wrapper: SDIO master: Slot 1, Data-Lines: 4-bit Freq(KHz)[40000 KHz]
I (1629) sdio_wrapper: GPIOs: CLK[18] CMD[19] D0[14] D1[15] D2[16] D3[17] Slave_Reset[54]
I (1633) sdio_wrapper: Queues: Tx[20] Rx[20] SDIO-Rx-Mode[1]
Name:
Type: SDIO
Speed: 40.00 MHz (limit: 40.00 MHz)
Size: 0MB
CSD: ver=1, sector_size=0, capacity=0 read_bl_len=0
SCR: sd_spec=0, bus_width=0
TUPLE: DEVICE, size: 3: D9 01 FF
TUPLE: MANFID, size: 4
  MANF: 0092, CARD: 6666
TUPLE: FUNCID, size: 2: 0C 00
TUPLE: FUNCE, size: 4: 00 00 02 32
TUPLE: CONFIG, size: 5: 01 01 00 02 07
TUPLE: CFTABLE_ENTRY, size: 8
  INDX: C1, Intface: 1, Default: 1, Conf-Entry-Num: 1
  IF: 41
  FS: 30, misc: 0, mem_space: 1, irq: 1, io_space: 0, timing: 0, power: 0
  IR: 30, mask: 1,   IRQ: FF FF
  LEN: FFFF
TUPLE: END
I (1711) sdio_wrapper: Function 0 Blocksize: 512
I (1715) sdio_wrapper: Function 1 Blocksize: 512
I (1719) H_SDIO_DRV: Card init success, TRANSPORT_RX_ACTIVE
I (1725) transport: set_transport_state: 1
I (1728) transport: Waiting for esp_hosted slave to be ready
I (1798) H_SDIO_DRV: SDIO Host operating in STREAMING MODE
I (1798) H_SDIO_DRV: Open data path at slave
I (1798) H_SDIO_DRV: Starting SDIO process rx task
I (1826) H_SDIO_DRV: Received ESP_PRIV_IF type message
I (1826) transport: Received INIT event from ESP32 peripheral
I (1826) transport: EVENT: 12
I (1828) transport: Identified slave [esp32c6]
I (1832) transport: EVENT: 11
I (1834) transport: capabilities: 0xd
I (1838) transport: Features supported are:
I (1842) transport:      * WLAN
I (1844) transport:        - HCI over SDIO
I (1848) transport:        - BLE only
I (1851) transport: EVENT: 13
W (1854) transport: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (1872) transport: === ESP-Hosted Version Warning ===
I (1877) transport: ESP board type is : 13

I (1881) transport: Base transport is set-up, TRANSPORT_TX_ACTIVE
I (1887) H_API: Transport active
I (1890) transport: Slave chip Id[12]
I (1893) transport: raw_tp_dir[-], flow_ctrl: low[60] high[80]
I (1898) transport: transport_delayed_init
I (1902) esp_cli: Remove any existing deep_sleep cmd in cli
I (1908) esp_cli: Registering command: crash
I (1912) esp_cli: Registering command: reboot
I (1916) esp_cli: Registering command: mem-dump
I (1920) esp_cli: Registering command: task-dump
I (1924) esp_cli: Registering command: cpu-dump
I (1928) esp_cli: Registering command: heap-trace
I (1933) esp_cli: Registering command: sock-dump
I (1937) esp_cli: Registering command: host-power-save
I (1942) hci_stub_drv: Host BT Support: Disabled
I (1946) H_SDIO_DRV: Received INIT event
I (1950) H_SDIO_DRV: Event type: 0x22
I (1953) H_SDIO_DRV: Write thread started
I (1957) host_performs_slave_ota: ESP-Hosted initialized successfully
I (2401) host_performs_slave_ota: Host firmware version: 2.6.0
I (2401) host_performs_slave_ota: Slave firmware version: 2.5.12
W (2402) host_performs_slave_ota: === ESP-Hosted Version Warning ===
Version on Host is NEWER than version on co-processor
RPC requests sent by host may encounter timeout errors
or may not be supported by co-processor
W (2421) host_performs_slave_ota: === ESP-Hosted Version Warning ===
I (2427) host_performs_slave_ota: Using Partition OTA method
I (2432) ota_partition: Starting Partition OTA from partition: slave_fw
I (2439) ota_partition: Found partition: slave_fw, size: 2097152 bytes
I (2445) ota_partition: Image header: magic=0xe9, segment_count=5, hash_appended=1
I (2452) ota_partition: Segment 0: data_len=305556, load_addr=0x420e0020
I (2459) ota_partition: Found app description: version='2.6.0', project_name='network_adapter'
I (2467) ota_partition: Segment 1: data_len=22108, load_addr=0x40800000
I (2473) ota_partition: Segment 2: data_len=893192, load_addr=0x42000020
I (2480) ota_partition: Segment 3: data_len=112024, load_addr=0x4080565c
I (2486) ota_partition: Segment 4: data_len=14524, load_addr=0x40820c00
I (2493) ota_partition: Total image size: 1347505 bytes
I (2497) ota_partition: Firmware verified - Size: 1347505 bytes, Version: 2.6.0
I (2506) ota_partition: Current slave firmware version: 2.5.12
I (2510) ota_partition: New slave firmware version: 2.6.0
I (2515) ota_partition: Version differs - proceeding with OTA from 2.5.12 to 2.6.0
I (2522) ota_partition: Proceeding with OTA - Firmware size: 1347505 bytes
E (12832) rpc_rsp: OTA write failed
I (12833) ota_partition: Partition OTA completed successfully - Sent 1347505 bytes
I (12833) host_performs_slave_ota: OTA completed successfully
E (12847) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED
I (12847) main_task: Returned from app_main()

[mantriyogesh]

Thanks for confirming. Working on it to fix this.

[mantriyogesh]

Hello @Justin08784 ,

iTerm2 Session 17 Oct 2025 at 9:11:44 PM.rtf

surprisingly i did not experience

E (12832) rpc_rsp: OTA write failed

Error,

E (12847) host_performs_slave_ota: Failed to activate OTA: ESP_ERR_NOT_SUPPORTED

is kind of expected from 2.5.12 to 2.6.x.

I had attached the logs for your refernce (tried to keep colored logs in rtf, but it is equally hard to interpret i realised later!)

Can you send me the slave side logs and host side logs ?
Also slave network_adapter.bin from 2.5.12 , if you have one? ( Already built on my own, but do not see issue on that)

[mantriyogesh]

Procedure:

1. build & flash slave from 2.5.12 on C6 (on ESP32-P4 function EV board using serial - ESP-Prog)
2. build latest c6 from. latest component
3. copy latest built slave in components/ota_partition/slave_fw_bin/latest.bin
4. at p4, on latest checkedout example of host_performs_slave_ota,
   idf.py fullclean , idf.py set-target esp32p4, idf.py menuconfig chnage to partition method, idf.py -p <host_port> flash monitor
5. first time p4 did ota fullly without ota_write failure. Failed only activate command. manual reboot p4. second boot, p4 identified c6 as 2.6.1 already, no need to do ota.

[mantriyogesh]

Can you please send me the full logs at slave and host in normal text including commands?

[Justin08784]

@mantriyogesh
I own two Firebeetle 2 dev kits. Dev kit A that I am testing this OTA method on (https://www.dfrobot.com/product-2950.html) does not expose a programming interface for the C6. Thus, the only way I can put new firmware onto the c6 is via OTA. Dev kit B (https://www.waveshare.com/esp32-p4-module-dev-kit.htm) does expose a programming interface, and thus OTA is not necessary since I can idf.py flash directly onto the c6 via UART.

I have followed your steps exactly on dev kit A except for step 1 (which I cannot follow as explained).
I also had to make the following modification in the host_performs_slave_ota example:

shinej@Eunsoos-MacBook-Pro-232 host_performs_slave_ota % git diff components/common_ota_scripts/flash_selected_firmware.cmake
diff --git a/examples/host_performs_slave_ota/components/common_ota_scripts/flash_selected_firmware.cmake b/examples/host_performs_slave_ota/components/common_ota_scripts/flash_selected_firmware.cmake
index eadc3ea..203caa2 100644
--- a/examples/host_performs_slave_ota/components/common_ota_scripts/flash_selected_firmware.cmake
+++ b/examples/host_performs_slave_ota/components/common_ota_scripts/flash_selected_firmware.cmake
@@ -40,7 +40,7 @@ endif()
 execute_process(
     COMMAND ${PYTHON} -m esptool
         -b 2000000
-        write-flash
+        write_flash
         --force
         ${SLAVE_FW_OFFSET} "${SELECTED_FIRMWARE_PATH}"
     RESULT_VARIABLE FLASH_RESULT

Here are the build/flash logs for the slave and host. As far as I know, I cannot access the slave's serial debug.
log_host.txt
log_slave.txt

[mantriyogesh]

The ESP (irrespective slave/host) serial flashing involves two things:

1. All necessary pins in correct mode, which is Download mode.
   Please refer Download mode at section3.1 Chip Boot Mode Control in https://documentation.espressif.com/esp32-c6_datasheet_en.pdf

and C6_CHIP_PU in https://dl.espressif.com/dl/schematics/esp32-p4-function-ev-board-schematics_v1.52.pdf

2. ESP32-P4 controls the EN pin of ESP32-C6.To avoid ESP32-P4 avoid controlling EN of ESP32-C6, you can put ESP32-P4 itself into download mode by simple command,

esptool.py -p <host_serial_port> --before default_reset --after no_reset run

See https://github.com/espressif/esp-hosted-mcu/blob/main/docs/esp32_p4_function_ev_board.md#5-flashing-esp32-c6

Regarding,

-        write-flash
+        write_flash

It is depending upon the esptool version, IMO. But thank you for letting us know this. helpful for us.

regarding original issue,

In the slave log, I can only see the buiild log.

Is there prior OTA failure log (both logs at the same time would help to cross relate). Can you please send me the slave firmware using https://wetransfer.com/ ? Please note, I would need your existing binary and not 2.6.1 so as i can reproduce.

E (12385) rpc_rsp: OTA write failed

is still a mystery for me, to crack.