mcu 'PIS': Unable to connect

[EnginGitg]

I followed the guides but it doesn't work. I have a raspberry pi 3a using fluid connected to ender 3 and pis.
Why is my serial usb-1a86 while yalls is rp2040?

Klipper is saying: mcu 'PIS': Unable to connect

PIS.cfg file:

`[mcu PIS]

Obtain definition by "ls -l /dev/serial/by-id/" then unplug to verify

serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0

[adxl345]
cs_pin: PIS:gpio13
#spi_bus: spi1a
spi_software_sclk_pin: PIS:gpio10
spi_software_mosi_pin: PIS:gpio11
spi_software_miso_pin: PIS:gpio12
axes_map: x,-z,y

[resonance_tester]
accel_chip: adxl345

accel_chip: adxl345

probe_points:
100,100,20 # an example
`

Printer.cfg file:

`# This file contains pin mappings for the stock 2020 Creality Ender 3

V2. To use this config, during "make menuconfig" select the

STM32F103 with a "28KiB bootloader" and serial (on USART1 PA10/PA9)

communication.

If you prefer a direct serial connection, in "make menuconfig"

select "Enable extra low-level configuration options" and select

serial (on USART3 PB11/PB10), which is broken out on the 10 pin IDC

cable used for the LCD module as follows:

3: Tx, 4: Rx, 9: GND, 10: VCC

Flash this firmware by copying "out/klipper.bin" to a SD card and

turning on the printer with the card inserted. The firmware

filename must end in ".bin" and must not match the last filename

that was flashed.

See docs/Config_Reference.md for a description of parameters.

[stepper_x]
step_pin: PC2
dir_pin: PB9
enable_pin: !PC3
microsteps: 16
rotation_distance: 40
endstop_pin: ^PA5
position_endstop: 0
position_min: 0
position_max: 230
homing_speed: 50

[stepper_y]
step_pin: PB8
dir_pin: PB7
enable_pin: !PC3
microsteps: 16
rotation_distance: 40
endstop_pin: ^PA6
position_endstop: -12
position_min: -12
position_max: 230
homing_speed: 50

[stepper_z]
step_pin: PB6
dir_pin: !PB5
enable_pin: !PC3
microsteps: 16
rotation_distance: 8
endstop_pin: probe:z_virtual_endstop
#position_endstop: 0.0
position_min: -4
position_max: 250

[stepper_z1]
step_pin: PA14
dir_pin: !PA13
enable_pin: !PC3
microsteps: 16
rotation_distance: 8
endstop_pin: probe:z_virtual_endstop

[extruder]
max_extrude_only_distance: 100.0
step_pin: PB4
dir_pin: PB3
enable_pin: !PC3
microsteps: 16
rotation_distance: 7.71
nozzle_diameter: 0.400
filament_diameter: 1.750
max_extrude_only_distance: 100
pressure_advance: 0.065
heater_pin: PA1
sensor_type: EPCOS 100K B57560G104F
sensor_pin: PC5
control: pid

tuned for stock hardware with 200 degree Celsius target

pid_Kp: 21.527
pid_Ki: 1.063
pid_Kd: 108.982
min_temp: 0
max_temp: 260

[heater_bed]
heater_pin: PA2
sensor_type: EPCOS 100K B57560G104F
sensor_pin: PC4
control: pid

tuned for stock hardware with 50 degree Celsius target

pid_Kp: 54.027
pid_Ki: 0.770
pid_Kd: 948.182
min_temp: 0
max_temp: 130

[fan]
pin: PA0

[mcu]
serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
restart_method: command

[printer]
kinematics: cartesian
max_velocity: 300
max_accel: 3000
max_z_velocity: 5
max_z_accel: 100

[bltouch]
sensor_pin: ^PB1
control_pin: PB0
x_offset: -36
y_offset: 0
#z_offset: 0

[safe_z_home]
home_xy_position: 151,115 # Nozzle coordinates
speed: 250
z_hop: 10
z_hop_speed: 5

[bed_mesh]
speed: 250
horizontal_move_z: 5
mesh_min: 40,40 # Probe coordinates
mesh_max: 190, 190
probe_count: 3,3

[screws_tilt_adjust]
screw1: 71,35 # Probe coordinates
screw1_name: front left screw
screw2: 230,35
screw2_name: front right screw
screw3: 230,200
screw3_name: rear right screw
screw4: 71,200
screw4_name: rear left screw
horizontal_move_z: 5.
speed: 250.
screw_thread: CCW-M4

[z_tilt]
z_positions: 39, 212.5
330, 212.5
points: 59, 117.5
230, 117.5
speed: 100
retries: 5
retry_tolerance: 0.05

[virtual_sdcard]
path: ~/printer_data/gcodes

[display_status]

[pause_resume]

[input_shaper]
shaper_freq_x: 40.4
shaper_type_x: 2hump_ei
shaper_freq_y: 53.6
shaper_type_y: 2hump_ei

[mcu rpi]
serial: /tmp/klipper_host_mcu

#[adxl345]
#cs_pin: rpi:None

#[resonance_tester]
#accel_chip: adxl345
#probe_points:

115,115,20

[include macros.cfg]
[include PIS.cfg]

## <---------------------- SAVE_CONFIG ---------------------->
## DO NOT EDIT THIS BLOCK OR BELOW. The contents are auto-generated.
##
## [bltouch]
## z_offset = 0.700
##
## [bed_mesh default]
## version = 1
## points =
## 0.000000, -0.017500, -0.052500
## 0.002500, -0.007500, -0.027500
## 0.002500, 0.002500, 0.027500
## tension = 0.2
## min_x = 40.0
## algo = lagrange
## y_count = 3
## mesh_y_pps = 2
## min_y = 40.0
## x_count = 3
## max_y = 190.0
## mesh_x_pps = 2
## max_x = 190.0
`

[bepstein111]

Do you have the NIS not the PIS? Many of the AliExpress pages selling the NIS call it the PIS even though it's not. See NIS here: https://github.com/FYSETC/Nozzle-Input-Shaper