root@lp-arm-4:~# raspistill -o image_$(date +%s).jpg -w 480 -h 360
mmal: Cannot read camera info, keeping the defaults for OV5647
mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)
mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)
mmal: Failed to create camera component
mmal: main: Failed to create camera component
mmal: Only 76M of gpu_mem is configured. Try running "sudo raspi-config" and ensure that "memory_split" has a value of 128 or greater
One of the issue that i face with my raspberry pi 4 SD card. I removed it when it was in the pi case. Which broke the SD card chip in half internally.
Lesson : Always remove the SD carefully.
broke my 32 GB SD card while removing from Pi. I tried formatting with fdisk, mkfs.ext4 and Windows but none of them worked.
I have attached screenshot of fdisk /dev/sda where I have created 1 partition but when i try to delete the same it’s giving error No partition is defined yet!
import Adafruit_DHT
import time
DHT_SENSOR = Adafruit_DHT.DHT11
DHT_PIN = 4
#while loop is there because sometime it does not get the temp.
while True:
humidity, temperature = Adafruit_DHT.read(DHT_SENSOR, DHT_PIN)
if humidity is not None and temperature is not None:
print("Temp={0:0.1f}C Humidity={1:0.1f}%".format(temperature, humidity))
else:
print("Sensor failure. Check wiring.");
time.sleep(1);
run:
python3 temp.py
For DHT22 sensor:
temp-dht22.py
import Adafruit_DHT
import time
DHT_SENSOR = Adafruit_DHT.DHT22
DHT_PIN = 4
humidity, temperature = Adafruit_DHT.read(DHT_SENSOR, DHT_PIN)
if humidity is not None and temperature is not None:
#print("Temp={0:0.1f}C Humidity={1:0.1f}%".format(temperature, humidity))
print("{0},{1}".format(temperature, humidity))
Note : This does not work because IO pins does not enough power to run fan.
fan.py
import RPi.GPIO as GPIO
from time import sleep
import sys
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(8, GPIO.OUT, initial=GPIO.LOW)
if sys.argv[1] == "on":
GPIO.output(8, GPIO.HIGH)
print("on")
else:
GPIO.output(8, GPIO.LOW)
print("off")
Dockerfile
FROM python:slim-buster
WORKDIR /fan
RUN apt update && \
apt install python-rpi.gpio python3-rpi.gpio -y
COPY fan.py .
Docker build
docker build -t fan .
Docker run command switch on
docker run -it --device /dev/gpiomem fan python2 fan.py on
Docker run command switch off
docker run -it --device /dev/gpiomem fan python2 fan.py off
fan.sh
#!/bin/bash
cpu=$(</sys/class/thermal/thermal_zone0/temp)
cpu_temp=$(echo "$cpu/1000" | /usr/bin/bc)
echo $cpu_temp
if(("cpu_temp" >= "65"))
then
echo "more 65 on fan"
docker run -it --device /dev/gpiomem fan python2 fan.py on
else
echo "less 65 off fan"
docker run -it --device /dev/gpiomem fan python2 fan.py off
fi
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt update && sudo apt install -y kubelet kubeadm kubectl
echo '[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --cgroup-driver=systemd"
Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
# This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically
EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
# This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should use
# the .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file.
EnvironmentFile=-/etc/default/kubelet
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS' > /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
systemctl daemon-reload
systemctl restart kubelet
