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Set environment

Install platform IO cli​

export PATH=$PATH:~/.platformio/penv/bin

printf("Restarting now.\n");
fflush(stdout);
esp_restart();

IDF_PATH=~/.platformio/packages/framework-espidf/

You may have to add pyserial: sudo pip3 install pyserial

Read device info: python3 $IDF_PATH/components/esptool_py/esptool/esptool.py --port /dev/cu.usbserial-A5XK3RJT flash_id

Read partition table

python3 $IDF_PATH/components/esptool_py/esptool/esptool.py --port /dev/cu.usbserial-A5XK3RJT read_flash 0x8000 0xc00 ptable.img

We can now check the content of the ptable.img file python3 $IDF_PATH/components/partition_table/gen_esp32part.py ptable.img

Here is an example of the result:

# Espressif ESP32 Partition Table
# Name, Type, SubType, Offset, Size, Flags
nvs,data,nvs,0x9000,20K,
otadata,data,ota,0xe000,8K,
app0,app,ota_0,0x10000,1280K,
app1,app,ota_1,0x150000,1280K,
spiffs,data,spiffs,0x290000,1472K,

Mac OS - OsX​

You may encounter a problem uploading the file to ESP32 that uses the new chip USB/UART CH9102x.

A fatal error occurred: Failed to write to target RAM (result was 01070000)

You may find more information about solving this problem at:

https://blog.squix.org/2021/08/ch9102-driver-issues-failed-to-write-to-target-ram.html

It is related to those issues:

This driver may help on Big Sur b tu fails for the last Monterey version CH9102_Mac_Driver.zip

Code: https://github.com/WCHSoftGroup/ch34xser_macos

On M1 we may have to explicitely accept kext (kernel extensions): https://support.apple.com/guide/security/kernel-extensions-sec8e454101b/1/web/1#sec8697bc589

FS​

Create a folder at the first level called data.

To upload the data

pio run --target uploadfs

Alternative web server​

https://github.com/me-no-dev/ESPAsyncWebServer#using-platformio

Searching libraries​

https://platformio.org/lib/search?query=si7021

OTA​

pio run -t upload --upload-port square.local pio run -t uploadfs --upload-port square.local