Identify ESP chip and flash using esptool

Here to identify ESP chip and flash using esptool.py

First, you have to identify the USB port connect to ESP. In Linux/Raspberry Pi

- Before connect your ESP device to USB, run following command to clear dmesg buffer:

$ sudo dmesg -c

- Connect your ESP32 device to USB, and then run dmesg:

$ dmesg

-  You will find some like "cp210x converter now attached to ttyUSB0". Where /dev/ttyUSB0 is the USB port connected to ESP device.

TO Read Chip ID, enter the command:

$ esptool.py --chip auto --port /dev/ttyUSB0 chip_id

TO read SPI flash manufacturer and device ID, enter the command:

$ esptool.py --chip auto --port /dev/ttyUSB0 flash_id

Here is the output for ESP32-DevKitC V4 with ESP32-D0WD-V3 (revision 3) chip and 8MB flash.

ESP8266 with ESP8266EX chip and 4MB flash.

ESP32-S2-Saola-1 with ESP32-S2 chip and 4MB flash.

ESP32-C3-DevKitM-1 with unknown ESP32-C3 (revision 3) and 4MB flash.