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+-- Forum: Technical Support (https://www.kincony.com/forum/forumdisplay.php?fid=20)
+--- Forum: KC868-A16 (https://www.kincony.com/forum/forumdisplay.php?fid=25)
+--- Thread: Kincony A16 does not enter programming mode (/showthread.php?tid=8050)
Kincony A16 does not enter programming mode - pgarbacz - 05-04-2025
Hello,
I recently bought KC868-A16 unit and just installed that in my electric box. I supplied 12V, connected the USB cable and tried to program it with ESPHOME firmware.
The problem I'm facing is that the unit is not showing up as COM port in Windows. Steps I took to enter the programming mode I guess should be:
1. connect USB-C to the computer
2. press and hold S2
3. connect 12V power
This should make the unit switching to upload, shouldn't it?
I tried also alternative path. I connected the unit through ethernet (on WiFi there is no custom KC868-like network so I guess maybe through ethernet it should work). The unit got assigned an IP address (checked it on the router) and can be pinged properly.
When trying to open http://units-ip/ page nothing shows up. I also guess there should be some standard firmware UI accessible under this address, shouldn't it?
How do I proceed? Please support.
RE: Kincony A16 does not enter programming mode - admin - 05-04-2025
you can install USB driver firstly, here is download link: https://www.kincony.com/download/CH341SER.zip
RE: Kincony A16 does not enter programming mode - cturqueti - 06-26-2025
I had the same problem. When I tried to program using VSCode + PlatformIO, it didn't accept programming, it gave me a flash size error, I got another prototyping board with the same processor and programmed it. I went back to the board, tried to reset the flash, but without success. After many attempts, I managed to program, then after some programming the defect returned, I tried to do the same procedure and I can't program anymore. The cable is fine because I have serial communication with the PC. I've already updated the driver and it didn't work.
LOG:
Processing nodemcu-esp32 (platform: espressif32; board: esp32dev; framework: arduino)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (2024.9.30) > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
- framework-arduinoespressif32 @ 3.1.0+sha.22a3b096
- tool-esptoolpy @ 4.8.0
- tool-mkfatfs @ 2.0.1
- tool-mklittlefs @ 3.2.0
- tool-riscv32-esp-elf-gdb @ 11.2.0+20220823
- tool-xtensa-esp-elf-gdb @ 11.2.0+20230208
- toolchain-xtensa-esp-elf @ 13.2.0+20240530
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 29 compatible libraries
Scanning dependencies...
Dependency Graph
|-- ArduinoOTA @ 3.1.0
|-- WiFi @ 3.1.0
Building in release mode
Retrieving maximum program size .pio\build\nodemcu-esp32\firmware.elf
Checking size .pio\build\nodemcu-esp32\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [= ] 13.6% (used 44420 bytes from 327680 bytes)
Flash: [===== ] 47.8% (used 626068 bytes from 1310720 bytes)
Configuring upload protocol...
AVAILABLE: cmsis-dap, esp-bridge, esp-prog, espota, esptool, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa
CURRENT: upload_protocol = esptool
Looking for upload port...
Auto-detected: COM5
Uploading .pio\build\nodemcu-esp32\firmware.bin
esptool.py v4.8.0
Serial port COM5
Connecting....
Chip is ESP32-D0WD-V3 (revision v3.1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
Traceback (most recent call last):
MAC: 14:33:5c:45:9d:70
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool.py", line 37, in <module>
Uploading stub...
esptool._main()
Running stub...
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\__init__.py", line 1314, in _main
Stub running...
main()
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Configuring flash size...
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\__init__.py", line 1036, in main
WARNING: Could not auto-detect Flash size (FlashID=0x0, SizeID=0x0), defaulting to 4MB
operation_func(esp, args)
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\cmds.py", line 491, in write_flash
if set_flash_size and set_flash_size > flash_end:
^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: '>' not supported between instances of 'int' and 'NoneType'
*** [upload] Error 1
======================================================================================= [FAILED] Took 7.03 seconds =======================================================================================
Environment Status Duration
------------- -------- ------------
nodemcu-esp32 FAILED 00:00:07.031
================================================================================== 1 failed, 0 succeeded in 00:00:07.031 ==================================================================================
RE: Kincony A16 does not enter programming mode - cturqueti - 06-26-2025
I had the same problem. When I tried to program using VSCode + PlatformIO, it didn't accept programming, it gave me a flash size error, I got another prototyping board with the same processor and programmed it. I went back to the board, tried to reset the flash, but without success. After many attempts, I managed to program, then after some programming the defect returned, I tried to do the same procedure and I can't program anymore. The cable is fine because I have serial communication with the PC. I've already updated the driver and it didn't work.
LOG:
Processing nodemcu-esp32 (platform: espressif32; board: esp32dev; framework: arduino)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (2024.9.30) > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
- framework-arduinoespressif32 @ 3.1.0+sha.22a3b096
- tool-esptoolpy @ 4.8.0
- tool-mkfatfs @ 2.0.1
- tool-mklittlefs @ 3.2.0
- tool-riscv32-esp-elf-gdb @ 11.2.0+20220823
- tool-xtensa-esp-elf-gdb @ 11.2.0+20230208
- toolchain-xtensa-esp-elf @ 13.2.0+20240530
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 29 compatible libraries
Scanning dependencies...
Dependency Graph
|-- ArduinoOTA @ 3.1.0
|-- WiFi @ 3.1.0
Building in release mode
Retrieving maximum program size .pio\build\nodemcu-esp32\firmware.elf
Checking size .pio\build\nodemcu-esp32\firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [= ] 13.6% (used 44420 bytes from 327680 bytes)
Flash: [===== ] 47.8% (used 626068 bytes from 1310720 bytes)
Configuring upload protocol...
AVAILABLE: cmsis-dap, esp-bridge, esp-prog, espota, esptool, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa
CURRENT: upload_protocol = esptool
Looking for upload port...
Auto-detected: COM5
Uploading .pio\build\nodemcu-esp32\firmware.bin
esptool.py v4.8.0
Serial port COM5
Connecting....
Chip is ESP32-D0WD-V3 (revision v3.1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
Traceback (most recent call last):
MAC: 14:33:5c:45:9d:70
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool.py", line 37, in <module>
Uploading stub...
esptool._main()
Running stub...
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\__init__.py", line 1314, in _main
Stub running...
main()
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Configuring flash size...
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\__init__.py", line 1036, in main
WARNING: Could not auto-detect Flash size (FlashID=0x0, SizeID=0x0), defaulting to 4MB
operation_func(esp, args)
File "C:\Users\Carlos\.platformio\packages\tool-esptoolpy@src-55e1438d6344232122195269b383659a\esptool\cmds.py", line 491, in write_flash
if set_flash_size and set_flash_size > flash_end:
^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: '>' not supported between instances of 'int' and 'NoneType'
*** [upload] Error 1
======================================================================================= [FAILED] Took 7.03 seconds =======================================================================================
Environment Status Duration
------------- -------- ------------
nodemcu-esp32 FAILED 00:00:07.031
================================================================================== 1 failed, 0 succeeded in 00:00:07.031 ==================================================================================
RE: Kincony A16 does not enter programming mode - cturqueti - 06-26-2025
Hello, the product arrived. When I tried to program using VSCode + PlatformIO, it did not accept programming, there was a flash size error, I got another prototyping board with the same processor and programmed it. I went back to the board, tried to reset the flash, but without success. After many attempts, I managed to program, then after some programming the defect returned, I tried to do the same procedure and I can no longer program. The cable is fine because I have serial communication with the PC.
RE: Kincony A16 does not enter programming mode - admin - 06-27-2025
already repied in another thread.