SOLVED !
Message form facebook BTT group
PG19 is definitely a GPIO pin. It may not be on the 40 pin GPIO header but any input / output pin on the BTT Pi and CB1 is GPIO.
The formula to convert from PG19 to GPIO is:
[(PG - PA)*32] + {Pin Number}
Where PA = 1, PB =2….so PG = 7
So [(7-1)*32] + 19 = 211
Try using GPIO211
The BTT documentation on this is rubbish and lacking.
result :

Thanks again and happy FAST printing
2 Likes
Push on GitHub with more explanation.
Phat3R
3
Is there any way to make that GPIO211 pin a PWM one rather than just voltage?
Sineos
4
Each pin can work as software PWM pin which usually is the better choice anyway.
If you aim for hardware PWM then the answer is no.
Jfml
5
I have btt pi v1.2 in the board connector that does not activate current or voltage. I have added the content to the print.cfg:
this added in file fanboard.cfg
[mcu host]
serial: /tmp/klipper_host_mcu
[temperature_fan raspberry_pi]
pin: host:gpio211
kick_start_time: 0.8
#shutdown_speed: 0
off_below: 0.1
max_power: 1.0
#fan_speed: 0.6
sensor_type: temperature_host
control: pid
min_temp: 0
max_temp: 85
#max_delta: 5.0
pid_kp: 1.0
pid_ki: 0.5
pid_kd: 2.0
min_speed: 0.1
max_speed: 0.6
target_temp: 38
but it doesn’t start anymore, it stays blue:
Klipper reports: STARTUP
Printer is not ready
The klippy host software is attempting to connect. por favor
retry in a few moments.
my config print.cfg
[include macros_config_pid.cfg]
[virtual_sdcard]
path: /home/biqu/printer_data/gcodes
on_error_gcode: CANCEL_PRINT
[stepper_x]
step_pin: PC2
pin_addr: PB9
enable_pin: !PC3
microsteps: 16
rotation_distance: 40
endstop_pin: ^PA5
position_endstop: 0
position_max: 247
homing_speed: 50
[stepper_y]
step_pin: PB8
pin_addr: PB7
enable_pin: !PC3
microsteps: 16
rotation_distance: 40
endstop_pin: ^PA6
position_endstop: 0
position_max: 217
homing_speed: 50
[stepper_z]
step_pin: PB6
pin_addr: !PB5
enable_pin: !PC3
microsteps: 16
rotation_distance: 8
# position_endstop: 0.0 # disable to use BLTouch
# endstop_pin: ^PA7 # disable to use BLTouch
endstop_pin: probe:z_virtual_endstop # enable to use BLTouch
position_min: -5 # enable to use BLTouch
position_max: 230
[safe_z_home] # enable for BLTouch
home_xy_position: 157.5, 121.5
speed: 200
z_hop: 10
z_hop_speed: 5
[bltouch]
sensor_pin: ^PB1
control_pin: PB0
x_offset: -46
y_offset: -7
#z_offset: 0
[bed_mesh]
speed: 120
horizontal_move_z: 5
mesh_min: 30,30 #18,18 #10,10
mesh_max: 189,189 #210,205
#mesh_pps: 2, 2
Probe_count: 5, 5
algorithm: bicubic
fade_start: 1
fade_end: 10
fade_target: 0
[screws_tilt_adjust]
screw1: 74, 42
screw1_name: Front left
screw2: 245, 42
screw2_name: Front right
screw3: 245, 208
screw3_name: Back right
screw4: 74, 208
screw4_name: Back left
screw_thread: CW-M4
horizontal_move_z: 10
[extruder] #test by my jfml
pressure_advance = 0.04
max_extrude_only_distance: 100.0
step_pin: PB4
pin_addr: PB3
enable_pin: !PC3
microsteps: 16
rotation_distance: 7.76
nozzle_diameter: 0.400
filament_diameter: 1,750
heater_pin: PA1
sensor_type: EPCOS 100K B57560G104F
sensor_pin: PC5
min_temp: 0
max_temp: 260
[heater_bed]
heater_pin: PA2
sensor_type: EPCOS 100K B57560G104F
sensor_pin: PC4
min_temp: 0
max_temp: 95
[fan] #cape fan
pin: PA0
[mcu] # ender board
serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
restart_method: command
[filament_switch_sensor filament_sensor]
pause_on_runout: True
switch_pin: !PA4
[printer]
kinematics: cartesian
max_velocity: 300
max_accel: 3000
max_z_velocity: 5
max_z_accel: 100
[temperature_sensor btt_pi_host]
sensor_type: temperature_host
min_temp: 10
max_temp: 100
[temperature_sensor mcu_temp_ender]
sensor_type: temperature_mcu
min_temp: 0
max_temp: 100
[include fanboard.cfg] here I have added the pi 1.2 motherboard fan configuration
[include mainsail.cfg]
[include Btt_ADXL345.cfg] #configuration btt resonance btt pi jfml
fanboard.cfg
[mcu host]
serial: /tmp/klipper_host_mcu
[temperature_fan raspberry_pi]
pin: host:gpio211
kick_start_time: 0.8
#shutdown_speed: 0
off_below: 0.1
max_power: 1.0
#fan_speed: 0.6
sensor_type: temperature_host
control: pid
min_temp: 0
max_temp: 85
#max_delta: 5.0
pid_kp: 1.0
pid_ki: 0.5
pid_kd: 2.0
min_speed: 0.1
max_speed: 0.6
target_temp: 38
I don’t know where I made the mistake but the pin or connector does not send voltage to the fan.
1 Like
@Jfml :
Could you please put your code snippet between code braces.

The way you did it, information like spaces get lost.
1 Like
Jfml
7
Any idea what the error could be?
Put inside printer.cfg
[mcu host]
serial: /tmp/klipper_host_mcu
Remove from fan…cfg
1 Like
Jfml
10
I have gotten it to work, I needed to create the MCU but I see that it spins slowly. I have measured voltage and it is approximately 3 v
If I set the value in klipperscreen to 0, the rest of the values stop spinning very slowly with only 3 v and the fan It is 5v
EddyMI3D
Split this topic
11