To communicate with an ESP32 the ESP-IDF (Espressif IoT Development Framework) can be used. This framework provides a collection of useful scripts to communicate with your ESP device. The framework is supported on Windows, Linux and macOS.
You can download the ESP-IDF repository and extract the contents into a folder.
Note that you need to have python 3 installed. For example by using
brew install python on macOS. In addition, the
esptool library is required by running
pip install esptool in your terminal.
Reading the Partition Table
The partition table is located at
0x8000 (32768) on older, and on
0x9000 (36384) on newer systems. Its length is always
0xc00 (3072) bytes.
With the esptool.py, this can be read out, for example by the command
python $(IDF_PATH)/components/esptool_py/esptool/esptool.py read_flash 0x9000 0xc00 ptable.img
To create a “human” readable csv file, you can use the
python $(IDF_PATH)/components/partition_table/gen_esp32part.py ptable.img > ptable.csv
In my case, the partition table looks as follows:
Foto von Vishnu Mohanan auf Unsplash