Need help to understand RF Calibration init data management and it's process for ESP32

[Ritesh]

Hi,

Recently, I started to look for PHY init data management into ESP32 w.r.t. Calibration process as well.

I have looked into make menuconfig configurations and found total 3 configurations for RF Phy Init Data configuration.

1) Default RF Calibration at boot time
2) Customize RF init data using Partition
3) Maximum TX Power Parameter Settings.

So, I have also looked into latest ESP32 Tool in which there is one tab for RF config.

I just have one question that RF config parameters for ESP8266 and ESP32 are same or different?

Also, RF data bin generated using ESP32 Flash Download tool is different then phy_init_data.bin file which is generated while compiling ESP32 application with customize RF PHY init Data Partition?

Because, I have looked HEX content of both file and found that phy_init_data.bin file is 144 bytes while RF binary generated using ESP32 Flash Download is 128 bytes.

Also, it will be good to provide some links to understand RF Calibration process for ESP32.

[Ritesh]

Anyone has idea for this?

[Ritesh]

Does anyone has any idea how RF PHY calibration is working with its different configurations? I need to understand it in details from both software and hardware perspective.

Please provide me document link or any other reference link to understand it in details.