sht36-42.md

MELLOW FLY SHT 36/42

Important notes about this board.

The pins PC15, PB1 are not suitable for Klicky/Endstop and should be avoided.

The probe port only supplies 5v so may not work with certain inductive probes.

• Pinda / BlTouch style probes will work fine

Flashing the canboot firmware via DFU on SHT36/42 (ST32F072C8)

Before proceeding it is critical that your CAN network is configured for your printer, failure to setup the network will cause a problem when you try to connect devices :) click here and select your controller for setup instructions!

Generate the CANboot firmware file

1. clone the CanBoot repository to your pi

   cd ~/
   git clone https://github.com/Arksine/CanBoot

2. run the following

   cd CanBoot
   make menuconfig

3. Configure your makefile for the SHT 36 / 42 with STM32F072

   

   Exit using ESC or Q, confirm with yes(Y)

4. Build the firmware

   make clean
   
   make

   

Hook up the Board for flashing

1. Add the boot jumper to the pins highlighted below

   

2. Connect your device to your PI via USB

3. Verify the device is in bootloader mode by using lsusb

   • you should see something like

      Bus 001 Device 005: ID 0483:df11 STMicroelectronics STM Device in DFU Mode

4. Flash the canboot bootloader to the board YOUR DeviceID (0483:df11) may be different CHECK IT! (see step 2)

5. ERASE AND FLASH THE CANBOOT FIRMWARE

   sudo dfu-util -a 0 -D ~/CanBoot/out/canboot.bin --dfuse-address 0x08000000:force:mass-erase:leave -d 0483:df11

   

   NOTE: If you see an error after the above, don't worry its fine, provided you have the "File Downloaded Sucessfully" and text above

6. Power off the SHT, remove the boot jumper, and insert the CANBUS cable

7. You can now power up your printer with the toolhead board attached via the appropriate wiring scheme using the H L 24v and gnd wires.

8. Wait for the device to boot and ensure your CAN0 network is up and you can see the device

   ~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0

   or

   ~/CanBoot/scripts/flash_can.py -i can0 -q

   You should see something like

   "Found canbus_uuid=XXXXXXXXXX, Application: CanBoot"

9. Assuming the above gave you a UUID you can now flash Klipper to your board via CanBoot... (if not see the troubleshooting section here)

   cd ~/klipper
   make menuconfig

   Enable low level configuratation set the following.

   

   Hit Q to exit and select Y to save changes.

   make clean
   make

   You can now flash the board

   python3 ~/CanBoot/scripts/flash_can.py -i can0 -f ~/klipper/out/klipper.bin -u MYUUID
   

   

   If all is well you now have a klipper firmware on your SHT.

   To verify this you can query the canbus uuid with

   ~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0

   You should see something like

   "Found canbus_uuid=XXXXXXXXXX, Application: Klipper"

Need a config here you go

Enjoy!

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