Question 1

How do I flash an ESP8266 using esptool-ck on Linux?

Accepted Answer

Connect your board to a serial port like /dev/ttyUSB0, then run commands such as 'esptool -cp /dev/ttyUSB0 -cf firmware.bin'. Use -cd for board-specific reset if needed, and refer to the examples in the README for address and baud rate settings.

Question 2

Esptool-ck vs esptool.py: which should I use for ESP8266?

Accepted Answer

Esptool-ck offers direct ELF file integration and board-specific resets, making it suitable for custom setups, while esptool.py is more actively maintained and supports multiple ESP chips. For ESP8266 with unique reset requirements, esptool-ck is a good choice, but for broader compatibility, esptool.py is often preferred.

Question 3

What boards support automatic reset with esptool-ck?

Accepted Answer

It supports boards like NodeMCU, wifio, ck, and dtrset, as listed in the README. Use the -cd option followed by the board name to automate reset and bootloader entry during flashing.

Question 4

How to erase flash memory on a NodeMCU using esptool-ck?

Accepted Answer

Run a command like 'esptool -cp /dev/ttyUSB0 -cd nodemcu -ce' to fully erase flash. For partial erasure, use -cz with a size parameter, ensuring alignment to 4kB boundaries as specified in the README.

Question 5

Can esptool-ck be used with ESP32?

Accepted Answer

No, esptool-ck is specifically for ESP8266 and does not support ESP32. For ESP32 development, use esptool.py or other tools from Espressif that are designed for newer chip families.

Question 6

How do I combine bootloader and application sections into one image?

Accepted Answer

After opening an ELF file with -eo and starting a firmware image with -bo, use -bs to add sections, then -bp to pad the image to a specific size. This allows merging sections, as detailed in the -bp option description for combining bootloader with applications.

ESPTool-ck

What is ESPTool-ck?

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