3 SHT42 Setup (or the problems)
Before starting I have checked the continuity, with everything off, the cable that joins UTOC and SHT, between the 24v pins, groud, H and L…
1 - SSH to Rpi
2 - cd ~/klipper/
3 - make clean
4 - make menuconfig
5 - Select these options:
A- Enable extra low level configuration options
B- Micro controller Architecture (..stm32...)
C- Procesor model (STM32F072)
D- No bootloader
E- Clock Refecnce (8 Mhz...)
F- Comunication Bus (Can Bus PA8/PA9)
G- 250000 Can bus speed
H- GPIO not chequed
6 - Quit, saving changes
7 - Compile firmware: make -j4
8 - Login in RPI FTP, and save file created /klipper/out/klipper.bin in HD
9 - With STM32, burn the firmware created (klipper.bin) in SHT42
9.1 - Place jumper
9.2 - Open CubeProgramer
9.3 - Full chip erase
9.4 - Select file created
9.5 - Start Programing
9.6 - Pop message all ok
9.7 - Disconnect in Cubeprogramer
9.8 - And disconect SHT42 from PC
12 - Retire jumper for programing.
13 - With a multimeter check resistance between, and its 0
14 - Place terminator jumpers, and recheck resistance, and now its 119 Ohm
11 - Conect Utoc to SHT with harness do it… checking 2, 3,… x times. Seems OK
12 - Power on printer… after a seconds too many light power on…
13 - Login SSH in Rpi
14 - Recheck CAN0 its up:
15 - Run UUID script: ~/klippy-env/bin/python ~/klipper/scripts/canbus_query.py can0
16 - After some seconds… 0 uuids found
