ESP-WROOM-02 Hardware and Firmware Release Information

[lucyelectric]

Hello,
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 earlier units 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 module, 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.

Many thanks for your help in advance,
Phil.

[chegewara]

1. The module is esp8266 and forum is esp32
2. It looks like the 1st module is original espressif and 2nd is some clone, which may be worse quality