vanturtlefan 1.0.0

Library to interface with a VanTurtle analog fan controller over I2C

VanTurtleFan

VanTurtleFan is a Python library designed to interface with a VanTurtle analog fan controller over I2C. It provides an easy-to-use API to control fan speed, direction, and power state.

Features

• Turn fans on or off.
• Adjust fan speed.
• Reverse airflow direction.
• Reset fan states.
• Read if the fan is in auto hold mode.

Requirements

• I2C bus support on your device (Raspberry Pi, Arduino,ESP32, etc)
• Python 3.5 or higher
• smbus library installed

Installation

To install the library, use the following command:

pip install vanturtlefan

Usage

Here is an example of how to use the VanTurtle_Fan class:

from fan_vanturtle import VanTurtle_Fan

# Initialize the VanTurtle_Fan controller
# Bus 1 is the default on raspberry pi 5
# 0x27 is the address if all DIP switches are set to off
fans = VanTurtle_Fan(bus=1, address=0x27)

# Turn on the first fan (left on the PCB, labelled "FAN ONE")
fans.onoff(VanTurtle_Fan.FAN_ONE)
# Turn on the second fan
fans.onoff(VanTurtle_Fan.FAN_TWO)

# Reverse airflow direction
fans.reverse(VanTurtle_Fan.FAN_ONE)
# Increase the speed
fans.faster(VanTurtle_Fan.FAN_TWO)
# Decrease the speed
fans.slower(VanTurtle_Fan.FAN_TWO)

# Check if the fan is in temperature hold mode
print(fans.is_autohold(VanTurtle_Fan.FAN_ONE))
# Enable temperature hold mode
fans.auto(VanTurtle_Fan.FAN_ONE)

# Make a beeping noise
fans.beep(VanTurtle_Fan.FAN_ONE)

Troubleshooting

Make sure that the RJ45 cables are connected correctly and that the pins on one end are in the same order as on the other.

Check that the LEDs on the board are turning on when executing a command. If they remain off your commands might not be reaching the controller of there is less than 3.3 volts on the VCC. If both LEDs are continuously on but faint, the controller has power but has not been initialised over I2C yet.

Addresses

Move the DIP switches on the to change the I2C address of the controller. This allows you to use multiple fan controllers on the same bus if you'd like.

Use the table below to find your address, or scan for it.

1 (A0)	2 (A1)	3 (A3)	Address
On (up)	On (up)	On (up)	20
Off (down)	On (up)	On (up)	21
On (up)	Off (down)	On (up)	22
Off (down)	Off (down)	On (up)	23
On (up)	On (up)	Off (down)	24
Off (down)	On (up)	Off (down)	25
On (up)	Off (down)	Off (down)	26
Off (down)	Off (down)	Off (down)	27

License

This project is licensed under the MIT License. See the LICENSE file for details.