Web-Flashtool

The Web Flash Tool allows you to transfer the firmware for the OBP40 to the device via a USB connection using a web browser. To do this, connect the OBP40 to a PC or laptop via the USB-C port and launch the Chrome or Edge web browser. The OBP40 has an integrated USB-to-serial converter for data transfer. Only the firmware can be transferred using the USB-C cable.

Note

Web browsers other than Chrome or Edge are not currently supported, as the functionality for accessing a serial interface is not implemented in other web browsers.

Warning

Please note that the Web-Flashtool can only be used with an OBP40 V1 with a Crow Panel 4.2, which uses an ESP32-S3 N8R8 processor and a GDEY042T81 e-paper display. If you are using other hardware, you will need to compile a customized firmware version for your specific hardware. Follow the instructions in the Compile and download chapter.

The following items are needed for the flashing process:

  • OBP40 (Crow Panal 4.2 with ESP32-S3 N8R8, E-Paper GDEY042T81)

  • USB-C to USB-A connection cable < 1.5m

  • PC with Chrome or Edge browser

1. Put OBP40 into flash mode

First, plug the USB cable into your PC without connecting it to the OBP40. Then, open the back of the OBP40. On the circuit board, in the upper right corner, you’ll find a button labeled BOOT. Press the BOOT button. Keep it pressed, then plug the USB connector into the circuit board. Afterward, you can release the BOOT button.

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Fig.: Circuit board pinout

2. Launch Flashtool

Next, visit the website of Online-Flashtools.

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Image: Homepage Web-Flashtool

Then press Connect and select the appropriate serial interface. The interfaces may be labeled differently depending on your operating system.

  • Windows: USB JTAG/serial debug unit COMx

  • Linux: /dev/ttyACMx

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Fig.: Selection of the interface

Note

Note that other serial interfaces may also be in use in the system. Select the interface that appears in the system after connecting the OBP40 to the USB port. Do not use existing interfaces, as they are already in use.

3. Firmware transfer
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Fig.: Start flashing process

Start the installation process via INSTALL OBP40 V2 FIRMWARE. A message will be displayed after successful transfer.

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Fig.: Firmware transfer

4. OBP40 starten

Temporarily disconnect the USB cable from the board and then reconnect it. After a short time, a display page should appear. Depending on the settings, the OBP logo and the QR code for Wi-Fi access may be displayed beforehand.

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Fig.: Display page