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Cold down the temperature of OPi automatically.
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| #!/usr/bin/python3 | |
| # opi_fan.py - Cold down the temperature of OPi automatically. | |
| # SPDX-License-Identifier: MIT (https://ncurl.xyz/s/o_o6DVqIR) | |
| # https://gist.github.com/supersonictw/046e10024038c18ccb46cbf3f1a88b79 | |
| fromsysimportargv | |
| fromtimeimportsleep | |
| fromgpiodimport ( | |
| request_lines, | |
| LineSettings | |
| ) | |
| fromgpiod.lineimport ( | |
| Direction, | |
| Value, | |
| ) | |
| """ /usr/local/sbin/opi_fan | |
| #!/bin/sh | |
| BASE_DIR="/opt/opi_fan" | |
| INTERPRETER="$BASE_DIR/venv/bin/python" | |
| CONTROLLER="$BASE_DIR/main.py" | |
| "$INTERPRETER" "$CONTROLLER" $1 | |
| """ | |
| """ /lib/systemd/system/opi_fan.service | |
| [Unit] | |
| Description=Cold down the temperature of OPi automatically. | |
| After=multi-user.target | |
| [Service] | |
| Type=simple | |
| ExecStart=/usr/local/sbin/opi_fan daemon | |
| [Install] | |
| WantedBy=multi-user.target | |
| """ | |
| CHECK_TIME_GAP=60 | |
| FAN_CONTROL_PIN=6 | |
| FAN_ENABLE_TEMPERATURE=60 | |
| COLD_TEMPERATURE_GAP=10 | |
| SYS_GPIO_CHIP_FILE="/dev/gpiochip0" | |
| SYS_TEMPERATURE_FILE="/sys/devices/virtual/thermal/thermal_zone0/temp" | |
| classFan: | |
| def__init__(self)->None: | |
| self.request=request_lines( | |
| SYS_GPIO_CHIP_FILE, | |
| consumer="opi_fan", | |
| config={ | |
| FAN_CONTROL_PIN:LineSettings( | |
| direction=Direction.OUTPUT, | |
| output_value=Value.INACTIVE | |
| ) | |
| }, | |
| ) | |
| defenable(self): | |
| self.request.set_value( | |
| FAN_CONTROL_PIN, | |
| Value.ACTIVE, | |
| ) | |
| defdisable(self): | |
| self.request.set_value( | |
| FAN_CONTROL_PIN, | |
| Value.INACTIVE, | |
| ) | |
| defcleanup(self): | |
| self.disable() | |
| self.request.release() | |
| deftemperature_read(): | |
| withopen(SYS_TEMPERATURE_FILE,"r")asf: | |
| temperature=f.read() | |
| returnint(temperature)/1000 | |
| deftemperature_loop(): | |
| whiletemperature_read()> (FAN_ENABLE_TEMPERATURE-COLD_TEMPERATURE_GAP): | |
| sleep(CHECK_TIME_GAP) | |
| deftask_cold(): | |
| fan=Fan() | |
| try: | |
| fan.enable() | |
| whileTrue: | |
| sleep(CHECK_TIME_GAP) | |
| exceptKeyboardInterrupt: | |
| print("Task interrupted.") | |
| finally: | |
| fan.cleanup() | |
| deftask_daemon(): | |
| fan=Fan() | |
| whileTrue: | |
| iftemperature_read()<FAN_ENABLE_TEMPERATURE: | |
| sleep(CHECK_TIME_GAP) | |
| continue | |
| fan.enable() | |
| temperature_loop() | |
| fan.disable() | |
| deftask_temp(): | |
| temperature=temperature_read() | |
| print(f"{temperature:.1f}°C") | |
| if__name__=='__main__': | |
| command_tasks= { | |
| "cold":task_cold, | |
| "daemon":task_daemon, | |
| "temp":task_temp, | |
| } | |
| iflen(argv)>1andargv[1]incommand_tasks: | |
| command_tasks[argv[1]]() | |
| else: | |
| print("No task specified.") |
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