Klippy.log
===== Config file =====
[mcu rpi]
serial = /tmp/klipper_host_mcu
[input_shaper]
shaper_freq_x = 53
shaper_freq_y = 37
shaper_type = mzv
etc etc
mcu 'mcu': Starting serial connect
webhooks client 548334536256: New connection
webhooks client 548334536256: Client info {'program': 'Moonraker', 'version': 'v0.9.2-6-gf735c04'}
Loaded MCU 'mcu' 100 commands (v0.10.0-348-gdc7b02f3 / gcc: (15:7-2018-q2-6) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907] binutils: (2.31.1-11+rpi1+11) 2.31.1)
MCU 'mcu' config: ADC_MAX=4095 BUS_PINS_i2c1=PB6,PB7 BUS_PINS_i2c1a=PB8,PB9 BUS_PINS_i2c2=PB10,PB11 BUS_PINS_spi1=PA6,PA7,PA5 BUS_PINS_spi1a=PB4,PB5,PB3 BUS_PINS_spi2=PB14,PB15,PB13 BUS_PINS_spi2a=PC2,PC3,PB10 BUS_PINS_spi3=PB4,PB5,PB3 BUS_PINS_spi3a=PC11,PC12,PC10 BUS_PINS_spi4=PE13,PE14,PE12 CLOCK_FREQ=180000000 MCU=stm32f446xx PWM_MAX=255 RESERVE_PINS_USB=PA11,PA12 RESERVE_PINS_crystal=PH0,PH1 STATS_SUMSQ_BASE=256 STEPPER_BOTH_EDGE=1
mcu 'rpi': Starting connect
mcu 'rpi': Unable to open port: [Errno 2] No such file or directory: '/tmp/klipper_host_mcu'
some insight as to where to start troubleshooting would be great! thanks