WizFi310 can be upgraded using serial interface. These are methods how to upload firmware using serial interface.
WIZnet supports <WizFi310_Update_Tool> for uploading firmware. This tool used XMODEM protocol with WizFi310 and it can be downloaded at WizFi310 Firmware(Using Serial).
Execute “WizFi310_Update_Tool.exe” and select serial port and baud rate. For your information, WizFi310 is set to 115200 for default baudrate.
If you select <Upload> button, This tool will try to upload firmware to WizFi310 as below.
If it is done successfully, you can see message as below.
If this tool is displayed error message as below, you have to check your binary whether it is right.
TeraTerm is terminal emulator. This software is open source software under BSD License. For more detailed information, Refer to it. ( https://ttssh2.osdn.jp/ ) You can download TeraTerm at this URL. ( https://en.osdn.jp/projects/ttssh2/releases/ )
In order to set for upgrading firmware, You can use AT+MUPGRADE command.
After enter AT+MUPGRADE in TeraTerm after WizFi310 restart. It will display 'C' message as below.