Espressif Systems ESP Faq page 170

Chapter 5. Hardware related
5.1.9 Do ESP products support Zephyr?
• Please refer to Espressif's Support for Zephyr
products. While there are only a few functional modules have been adapted so far, other modules will be
updated further later. For feature requests, you may check or ask on the
• You can also find information about ESP products in sections like
Zephyr Docs <https://docs.zephyrproject.org/latest/introduction/index.html>.
5.1.10 How to identify the chip revision from the chip silk marking?
You can do it by checking the second character of main die line on the chip silk marking.
The mapping between the chip revision of all our chips and the second character of main die lie can be found in the
table below:
Espressif Systems
Chip Series Chip Revision
ESP32 v0.0
v1.0
v1.1
v3.0
v3.1
ESP32-S2 v0.0
v1.0
ESP32-C3 v0.0
v0.1
v0.2
v0.3
v0.4
ESP32-S3 v0.0
v0.1
v0.2
ESP32-C2/ESP8684 v0.0
v1.0
v1.1
v1.2
ESP32-C6 v0.0
ESP32-H2 v0.0
v0.1
Submit Document Feedback
for detailed information about the support for Zephyr in ESP
Zephyr GitHub issue
XTENSA Boards
Marking Indicator
A
B
F
E
G
A
B
A
B
C
D
E
A
B
C
A
AA
B
C
A
A
B
153
first.
and RISCV Boards in
Release master