Ma situation
Bonjour à tous,
J’ai récemment ajouté un ventillateur pour refroidir le boitier de mon raspberry car mon boitié maison intègre un écran en plus du rapsberry ce qui génère un peut trop de chaleur pour une dissipation naturelle.
J’ai donc opté pour deux petit ventilateurs 5V que j’ai intégré dans le boitié.
Les ventilateurs étant bruyant si ils fonctionnent en continu j’ai mis en place un script Python pour les réguler.
Je me suis inspiré de ce site :
P.S.: J’ai adapté le script pour qu’il adapte la puissance du ventilateur de façon plus autonome.
Si ça intéresse quelqu’un je me le code du script à la fin du post.
Mon problème
Je voudrais récupéré dans HA l’état des ventilateurs, ou plus précisement la puissance fournie.
Le script permet d’alimenter les ventillateurs via un PIN avec une puissance variant entre 0 et 5V (5V étant le max que peut fournir le PIN)
Ma configuration
| version | core-2021.2.3 |
|---|---|
| installation_type | Home Assistant Supervised |
| dev | false |
| hassio | true |
| docker | true |
| virtualenv | false |
| python_version | 3.8.7 |
| os_name | Linux |
| os_version | 5.10.11-v7+ |
| arch | armv7l |
| timezone | Europe/Paris |
Home Assistant Community Store
| GitHub API | ok |
|---|---|
| Github API Calls Remaining | 4980 |
| Installed Version | 1.10.1 |
| Stage | running |
| Available Repositories | 810 |
| Installed Repositories | 5 |
Home Assistant Cloud
| logged_in | false |
|---|---|
| can_reach_cert_server | ok |
| can_reach_cloud_auth | ok |
| can_reach_cloud | ok |
Hass.io
| host_os | Raspbian GNU/Linux 10 (buster) |
|---|---|
| update_channel | stable |
| supervisor_version | supervisor-2021.02.6 |
| docker_version | 20.10.3 |
| disk_total | 7.0 GB |
| disk_used | 4.5 GB |
| healthy | true |
| supported | failed to load: Unsupported |
| supervisor_api | ok |
| version_api | ok |
| installed_addons | File editor (5.2.0), MariaDB (2.2.1), Let’s Encrypt (4.11.0), Samba share (9.3.0), Mosquitto broker (5.1), Spotify Connect (0.8.2) |
Lovelace
| dashboards | 1 |
|---|---|
| resources | 2 |
| views | 7 |
| mode | storage |
Spotify
| api_endpoint_reachable | ok |
|---|
Le scrip modifié
#!/usr/bin/python
#-*- coding: utf-8 -*-
# Change made by Matt
# Old behavior: Fan min speed is define in table
# New behavior: Fan is stopped if temperature is below trigger
# Fan speed is automatically adjusted according if temperature is inscreasing up to max speed define
import RPi.GPIO as GPIO
import time
import sys
# Configuration
FAN_PIN = 21 # BCM pin used to drive transistor's base
WAIT_TIME = 5 # [s] Time to wait between each refresh
FAN_MIN = 20 # [%] Fan minimum speed.
PWM_FREQ = 25 # [Hz] Change this value if fan has strange behavior
# Configurable temperature and fan speed steps
tempSteps = [50, 70] # [°C]
speedSteps = [30, 80] # [%]
# Fan speed will change only of the difference of temperature is higher
# than hysteresis
hyst = 1
# Setup GPIO pin
GPIO.setmode(GPIO.BCM)
GPIO.setup(FAN_PIN, GPIO.OUT, initial=GPIO.LOW)
fan = GPIO.PWM(FAN_PIN, PWM_FREQ)
fan.start(0)
i = 0
cpuTemp = 0
fanSpeed = 0
cpuTempOld = 0
fanSpeedOld = 0
firstRun = 0 # 0:fan stopped | 1: fan start | 2:fan running
fanSpeedIncrement = 5
updateCpuTemp = 0
# We must set a speed value for each temperature step
if len(speedSteps) != len(tempSteps):
print("Numbers of temp steps and speed steps are different")
exit(0)
try:
while 1:
# Read CPU temperature
cpuTempFile = open("/sys/class/thermal/thermal_zone0/temp","r")
cpuTemp = float(cpuTempFile.read()) / 1000
cpuTempFile.close()
#print("Temperature cpu lue: %1",cpuTemp)
#Below first value, fan is stopped
if (cpuTemp < tempSteps[0]) and (firstRun != 0):
fanSpeed = 0
updateCpuTemp = 1
firstRun = 0
#print("Fan Stop")
#First run: fan is set to max speed to make shure fan start
elif firstRun == 0:
fanSpeed = speedSteps[1]
firstRun = 1
updateCpuTemp = 1
#print("First run: temperature : " , cpuTemp , " | fan speed : " , fanSpeed)
else:
#Fan speed is set to an approximate power regarding the min and max temps defined
if firstRun == 1:
#If max temp reach set fan to MAX
if cpuTemp > tempSteps[1]:
fanSpeed = speedSteps[1]
else:
#Set fan speed linear integrate bewteen MIN and MAX
currentPercentToMaxTemp = (cpuTemp - tempSteps[0]) / (tempSteps[1] - tempSteps[0])
fanSpeed = round((speedSteps[1] - speedSteps[0]) * currentPercentToMaxTemp + speedSteps[0])
#print("fan speed", fanSpeed)
firstRun = 2
updateCpuTemp = 1
#print("Second run: temperature : " , cpuTemp , " | fan speed: " , fanSpeed)
else:
#print("Other run - Old: ", cpuTempOld , " New: ", cpuTemp)
#Only update fan speed if temperature difference is higher than hyst
if abs(cpuTemp - cpuTempOld) > hyst:
#print("Trigger reach")
if (cpuTemp > cpuTempOld) and (fanSpeed < speedSteps[len(tempSteps) - 1]):
fanSpeed = fanSpeedOld + fanSpeedIncrement
#print("Temperature increase: " , cpuTemp , " | new speed: " , fanSpeed)
elif (cpuTemp < cpuTempOld) and (fanSpeed > speedSteps[0]):
fanSpeed = fanSpeedOld - fanSpeedIncrement
#print("Temperature decrease: " , cpuTemp , " | new speed: " , fanSpeed)
updateCpuTemp = 1
if fanSpeed != fanSpeedOld:
fan.ChangeDutyCycle(fanSpeed)
fanSpeedOld = fanSpeed
#print("Fan speed updated!")
if updateCpuTemp == 1:
cpuTempOld = cpuTemp
updateCpuTemp = 0
time.sleep(WAIT_TIME)
# If a keyboard interrupt occurs (ctrl + c), the GPIO is set to 0 and
# the program exits.
except KeyboardInterrupt:
print("Fan ctrl interrupted by keyboard")
GPIO.cleanup()
sys.exit()