ESP-WROOM-02 Hardware/Firmware Release Information

[lucyelectric]

We have used many ESP-WROOM-02 WiFi Modules since about 2015, (approx 1500+ modules).

Recent batch purchases have revealed a new style module package (well at least the printing on the can is quite different) and also what we believe to be new Firmware revision being reported.

The Firmware version on the earlier modules is reporting as: 1.5.3.0
On the newer purchased modules we are seeing a version of 1.6.2.0 being reported.

We have some connection issues with the newer style WiFi module, specifically with the "AT+CWLIF" command where on the newer module the IP address of the connected equipment on the WiFi network (e.g. my Laptop) is not returned when we send this command, the response from the WiFi module is just returns OK every time.
Any thoughts on this please?

Where can I find details of the Firmware release notes detailing the Firmware changes made. ?

Also I would like to be able to confirm if there have been any Hardware changes to the module ?


Attached: I have attached 2 photos, for the older style and newer style module packages.


Kind Regards,
Phil.

[Her Mary]

v1.5.3 seems to be a very old version. Maybe you can find release notes on GitHub. https://github.com/espressif/ESP8266_NONOS_SDK/releases