Raspberry Pi

RPi Benchmark

sudo curl https://raw.githubusercontent.com/TheRemote/PiBenchmarks/master/Storage.sh | sudo bash

Setting up Dynamic DNS using DDClient

# Configuration file for ddclient generated by debconf
#Edit the configuration file: sudo nano /etc/ddclient.conf
# /etc/ddclient.conf
use=web, web=checkip.dyndns.org/
login=<dynu username>
password='<dynu password>�

Testing your DDClient configuration

You can check if the pre-defined use values can detect your WAN IP by running this command:
sudo ddclient -query
If your server is connected with a wireless connection, the output should look something like this:
use=if, if=eth0 address is NOT FOUND
use=if, if=lo address is
use=if, if=wlan0 address is
use=web, web=dnspark address is NOT FOUND
use=web, web=dyndns address is
use=web, web=loopia address is
To test your ddclient configuration with really verbose output, printing all possible configuration parameters and their values, you can use this command:
sudo /usr/sbin/ddclient -daemon 30 -debug -verbose > temp

Forwarding RPi IP address to Dynudns

You can make a script in Raspberry Pi and setup a cron job to run every 5 minutes to keep your hostnames updated to the most current IP address.
1. You can make a directory to put the files in.
cd ~
mkdir dynudns
cd dynudns
vi dynu.sh
2. Move to dynu.sh and make the script. Copy and paste the following into the file and save it.
echo url=�http://api.dynu.com/nic/update?hostname=<domain>.dynu.com&password=<password>� | curl -a -k -a -o /home/pi/dynudns/dynu.log -K �
echo >> /home/pi/dynudns/dynu.log
echo �Time: $(date)� >> /home/pi/dynudns/dynu.log
*/10 * * * * bash -l -c /home/pi/dynudns/dynu.sh >/dev/null 2>&1
3. Make dynu.sh executable.
chmod 700 dynu.sh
4. Use a cron job to make the script run every 5 minutes.
crontab -e
copy and paste the below to the bottom of the crontab:
*/10 * * * * bash -l -c /home/pi/dynudns/dynu.sh >/dev/null 2>&1
To verify that the command was added to the cronjob you can list the cron jobs to make sure it is there:
crontab -l
It should show
*/10 * * * * bash -l -c /home/pi/dynudns/dynu.sh >/dev/null 2>&1
You can adjust the update interval by modifying the */10 to */60 for every 60 minutes or whatever interval you need.

Adding Image Uploads to Weather Underground

1. Create a script to upload the images, create a new file called �wunder.sh� and enter the following in the file:
a. #!/bin/bashfilename=��http://localhost:8082/html/cam.jpg�
lftp ftp://$username:$password@$hostname -e �put $filename ; quit�
2. Save and exit
3. Make the script file executable:
a. sudo chmod +x wunder.sh
b. Copy the file to /home/pi with cp wunder.sh /home/pi/
4. Create a PYTHON script file:
a. sudo nano wunder.py
b. Add to the file the following:
i. #!/usr/bin/env pythonimport shutil
import os
os.system(�bash -c /home/pi/wunder.sh�)
5. Make the PYTHON script executable:
a. sudo chmod -x wunder.py
6. Add to the CRONTAB an updating call to the script:
1. sudo crontab -u pi -e (-u for User that is pi and -e for Edit)
2. Add the following for 15-min updates intervals:
*/15 * * * * python /home/pi/wunder.py >> /home/pi/script.log &
7. Finished

Camera Installation


General Utilities

1. Check how much RAM is installed:
free -h
total used free shared buff/cache available
Mem: 3.8Gi 470Mi 1.7Gi 136Mi 1.6Gi 3.1Gi
Swap: 99Mi 0B 99Mi

2. Check Disk Free Space
DF -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 117G 7.4G 105G 7% /
devtmpfs 1.8G 0 1.8G 0% /dev
tmpfs 2.0G 24M 1.9G 2% /dev/shm
tmpfs 2.0G 8.6M 1.9G 1% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/mmcblk0p1 253M 53M 200M 21% /boot
tmpfs 391M 0 391M 0% /run/user/1000

MariaDB Notes

Editing the database schema:
1. First log on to MYSQL:
a. sudo mysql -u<username> -p
b. enter <password>
2. General utilities:
a. SHOW DATABASES; # lists all databases created
b. DESCRIBE <table>; # e.g. socdata in records
3. Select a database to work on:
a. USE <database>;
b. SELECT * FROM <tablename> # shows all rows
c. ALTER <tablename> ADD COLUMN <name> <type> #e.g. ALTER socdata ADD COLUMN kwh float
d. UPDATE <<databasename>.<tablename> SET <columnname>=�value� WHERE <columnname>=�value� && date=�2021-05-15 15:25:00″
4. Access database:
a. sudo mysql -uroot -p
5. Show databases:
a. show databases;
6. Connect to database:
a. use �database name�;
7. Show Tables:
a. show tables;
8. Show Columns:
a. show columns from �database name�;
9. Show Rows:
a. select * from �database name�;
10. Add a Column
a. ALTER TABLE battery_data ADD COLUMN batterycharge FLOAT;

Argon One M.2 Case – auto power on after power failure

1. Install i2c tools
a. sudo apt-get install i2c-tools
2. Modify i2c settings for case by entering this at the command-line and you have an auto-power-up Pi:
a. i2cset -y 1 0x01a 0xfe