Katapult Firmware

Notes

• Katapult is the BL firmware
• SHT36_V3 supports CAN and RS232
• Only CAN firmware is provided here, with rates of 500K and 1M

Entering Flash Mode

Tip

The arrow points to the BOOT button

• Enter Flash Mode:
  • Completely power off the tool board.
  • Press and hold the BOOT button (location shown below). While holding, connect it to your computer via a Type-C data cable.
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Flashing the Firmware

• Windows Flashing Tutorial
• Host PC Flashing Tutorial

• Firmware download address for SHT36 V3
• You can obtain the firmware via the following links:

• Download Firmware Package - Directly download the latest firmware archive
• Repository Address - Visit the firmware repository

• The firmware location is:

FLY-Firmware/ToolBoard/SHT36

• Prepare a data cable with data transfer capability
• Download the firmware to your computer
• Connect the BOOT jumper or press and hold the button while connecting to the computer. At this point, the RPI-RP2 disk will appear
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• Remove the BOOT jumper or release the button!!!
• Copy the firmware to be flashed into the disk. Please note that only firmware with the UF2 file extension can be used!!! (Do not modify the file extension—it will not work)
• Reference
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• After copying the firmware, the RPI-RP2 disk will automatically disappear, indicating that the firmware flashing is complete!

1. Install the Flashing Tool

   • Enter the following command in SSH
   • Only required for the first flash; no need to execute again later

   cd ~/klipper/lib/rp2040_flash/ && make

2. Execute the following command to check if the connection is successful.

   • Enter lsusb

   • If there is no 2e8a:0003 device, try re-entering flashing mode

   • Due to system version differences, it may display other names. If 2e8a:0003 is present, it indicates entry into flashing mode.

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   Note

   Proceed to the next step only when 2e8a:0003 is present.

3. Pull the Pre-compiled Firmware

   • These are all pre-compiled firmware files
   • Note: The host machine must have internet access to install
   • Execute the following command on the host machine to download the firmware package:

   cd && git clone https://cnb.cool/3dmellow/FLY-Firmware.git

   • If the firmware package has already been downloaded, it is recommended to update it before proceeding with the remaining steps:

   cd ~/FLY-Firmware && git pull

4. Flash the firmware

Tip

Only one firmware needs to be flashed

• Below is the command to flash the firmware for 500K CAN rate:

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36V3_katapult_CAN_500K.uf2

• Below is the command to flash the firmware for 1M CAN rate:

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36V3_katapult_CAN_1M.uf2

5. If the following prompt appears, the flashing was successful:

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Tip

After flashing is complete, you need to completely power off the board once.

Verifying Firmware Startup

• If the firmware starts normally, the LED will begin to blink.

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