SHT36 V3 Onboard DIP Switches and Firmware Instructions

Selecting the Firmware Type

Please confirm the connection method first

• For CAN connections: select CAN firmware.
• For RS232 connections: select RS232 Firmware.
• For RRF-CAN functionality: select RRF-CAN firmware.
• Only one of the three firmware types can be selected. Do not flash multiple types simultaneously.

Firmware Type	Applicable Scenario	Advantages	Confirmation Before Selection	Operation
CAN Firmware	When CAN connection is needed	Supports CAN bus communication	Confirm the CAN baud rate matches the host and other devices	See CAN firmware steps below
RS232 Firmware	When RS232 connection is needed	Suitable for direct serial connection	Confirm RS232 wiring and host serial port configuration	See RS232 firmware steps below
RRF-CAN Firmware	When using RRF-CAN functionality	Supports RRF-CAN operating mode	Follow the corresponding DIP switch and flashing steps	See RRF-CAN firmware steps below

Factory Firmware

The SHT36 V3 comes pre-flashed with Katapult (CAN) firmware from the factory, with a default baud rate of 1M. For other configurations (e.g., CAN baud rate 500K), re-flash the firmware by following the steps below.

Firmware Flashing Steps and DIP Switch Settings

1. CAN Firmware (Klipper)

• DIP Switch Settings:

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• Flashing Preparation: Before flashing. Please ensure the CAN cable is connected between the tool board and the mainboard. And connect the 12V-24V power supply.

2. RS232 Firmware (Klipper)

• DIP Switch Settings:
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• Flashing Steps: First, flash the compiled firmware through the USB port of the tool board. Then connect the RS232 cable.

3. RRF-CAN Firmware

• DIP Switch Settings:
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• Flashing Steps: Flash the RRF firmware through the USB port of the tool board. Then connect the CAN cable.