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PAN9520 ETU Evaluation Tool
The related settings are configured by the "phy_init_data" binary. Panasonic provides two
version of this file (FCC/IC and RED), which can be used for this purpose. For more information
please refer to the "PAN9520 Module Integration Guide".
Make sure that a "phy_init" binary is flashed that complies with the regulations to address
"0xF000".
Default Settings in the "factory_param" Binary
3.17.3.1
For a convenient usage of the pre-built AT software with the PAN9520 ETU, it is recommended
to replace the file factory_param.bin. This configures the default settings for e.g. the pin
assignment. On the PAN9520 ETU, the standard UART1 pins (GPIO 17 to 20) are connected to
the FT232 USB to UART interface. In contrast, the default WROVER factory.bin configures
GPIO 21 as pin RX instead of GPIO 18. By flashing an adapted binary, the on-board
USB-to-UART1 interface can be used for controlling the AT software.
The "factory_param" binary is located in the folder ESP32-S2-WROVER_AT_BIN_VX.X.X.X >
customized_partitions (AT binary download folder). It is recommended to edit a copy of the
existing binary by using a tool like e.g. "HxD".
Other methods are also possible, but require the AT source code to be downloaded (for details
please refer to
v2.1.0.0_esp32s2/Compile_and_Develop/How_to_create_factory_parameter_bin.html#modify-
factory-param-data).
Adapting Binary
The following requirement must be met:
✓ A Hex Editor is installed. In the following the tool "HxD" is used.
1. Navigate to the folder customized_partitions.
2. Open either factory_param.bin or factory_param_WROVER.bin with HxD.
3. Optional: Save a copy of the file with a new name.
User Guide Rev. 1.0
https://docs.espressif.com/projects/esp-at/en/release-
3 PAN9520 ETU
Page 31 of 35
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