Installation instructions assume Python3 on Raspberry Pi OS 11 (Bullseye) or Raspbian version 10 (Buster).
Raspberry Pi OS 11 (Bullseye)
Raspbian OS 10 (Buster)
Raspbian OS 9 (Stretch) - Support ended on June 30, 2022. Upgrade to Bullseye.
Disclaimer: You could damage your raspberry pi if you do not insert a voltage divider between the echo pin on the sensor and the GPIO pin on the Raspberry Pi. If you choose to do this you do it at your own risk. Please make sure you understand GPIO information on your pi.
Before installing Raspi-Sump you must setup your hardware.
Use two resistors to create a voltage divider from the Sensor to the Pi. There are various combinations of resistors that you can use, a google search for Voltage Divider Calculator will allow you to calculate which combination you can use to bring the voltage down from the echo pin to 3.3V. I used a 470 Ohm and 1K Ohm resistor to bring the voltage down on the GPIO pin to 3.4 which is within a tolerable 5% level. I could have also used a 1K and 2K resistor to give me 3.333V.
Four wires connected as follows from the sensor to the pi (note, this will require some soldering). A floppy disk power connector fits nicely on the sensor. If you are just testing then a breadboard works great for quick and easy connections.
-
VCC pin to 5V pin on Pi (pin 2)
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Ground pin to Ground on Pi (pin 6)
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Trig pin to GPIO
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Echo pin to GPIO (need 470R resistor and 1K resistor to create a voltage divider.) In short, the 470 Ohm and 1K Ohm resistor are connected to one another with the Echo wire soldered between both of them to the GPIO pin. The other end of the 1K resistor is then soldered to the Ground wire.
see https://www.linuxnorth.org/raspi-sump/ for information on pins I used and more details about the hardware setup.
Google soldering resistors for good information on how to do this if you have never done it.
Note: Your account must have sudo access to install Raspi-Sump.
Now that your hardware is setup and properly connected to the gpio pins, login to your Raspberry Pi.
Check that your user account is a member of the gpio group. This is needed for accessing the gpio pins.
groups
You should see all groups your account belongs to. If gpio is not listed run the following command ($USER will be replaced with your account name);
sudo usermod -aG gpio $USER
Logout and log back into your account for the groups to take effect.
Install Pip, RPi.GPIO and Matplotlib
sudo apt update && sudo apt -y upgrade
sudo apt install python3-pip python3-rpi.gpio python3-matplotlib
RPi.GPIO is the library that controls the sensor.
Matplotlib is used to generate charts.
The Pip package manager is required to install Raspi-Sump in the next step.
The following will automatically install hcsr04sensor if it is not already installed on your Pi.
sudo pip3 install --no-binary :all: raspisump
Navigate to /home/$USER/raspi-sump/ and move the sample config file to this directory.
cd /home/$USER/raspi-sump
mv sample_config/raspisump.conf .
The /home/$USER/raspi-sump folder is setup as follows on install;
-
raspi-sump/sample_config/raspisump.conf (all configurations for raspisump).
-
raspi-sump/csv (location of waterlevel readings to csv file)
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raspi-sump/charts (location of charts if using rsumpchart.py)
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raspi-sump/logs (location of rsumpmonitor.py logs if using raspisump as a continuous process)
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raspi-sump/web (all files needed for the optional pi webserver install)
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"depracated" raspi-sump/cron (example crontab for scheduling readings)
- NOTE that cron has been replaced with systemd.
**Note take care with your raspisump.conf file if you are using Gmail or any other mail system that requires authentication. Your username and password will be viewable in the file. You should have a strong password on your account.. The installer also tightens file security on the file automatically.
All configurations are recorded in /home/$USER/raspi-sump/raspisump.conf
See the configuration file for explanations of variables. You can choose to take imperial (inches) or metric (centimetres) water level readings.
Enable lingering. This will ensure the raspisump service you configure on the next step will remain running when you are logged out. This only needs to be done once.
sudo loginctl enable-linger $USER
Reboot the pi to ensure logind has activated lingering.
sudo reboot
To start Raspi-Sump you will need to enable it with systemd. The first time you install Raspi-Sump you will need to run this command for systemd to find the service files located in /home/$USER/.config/systemd/user
systemctl --user daemon-reload
Start the raspisump service
systemctl --user start raspisump
Configure raspisump to start after reboots
systemctl --user enable raspisump
To monitor the log file in the csv folder while raspi-sump is running;
tail -f 'waterlevel-20230523.csv'
If you ever need to stop raspisump
systemctl --user stop raspisump
Prevent Raspi-Sump from running at boot time
systemctl --user disable raspisump
If you make a change to the raspisump.conf file, you must restart raspisump
systemctl --user restart raspisump
View the current status of the raspisump process
systemctl --user status raspisump
You can automate the creation of charts at 15 minute intervals with systemd for later viewing on the pi webserver which will be configured later in this document. The first time it runs your webchart folder directory will be automatically created.
systemctl --user start rsumpwebchart.timer
systemctl --user enable rsumpwebchart.timer
Prevent charts from being automatically created
systemctl --user stop rsumwebchart.timer
Prevent charts from being activated at boot time
systemctl --user disable rsumpwebchart.timer
View the current status of the chart timer
systemctl --user status rsumpwebchart.timer
To test that emails are working run the command 'emailtest';
emailtest
Raspi-Sump can send email tests at predefined intervals. See the raspisump.conf file option 'heartbeat' and 'heartbeat_interval'.
In /home/$USER/raspi-sump/raspisump.conf, this section configures the email heartbeat once per week.
# Set a heartbeat sms or email interval in order to regularly test that your
# notifications are working as intended.
# 0 = No notifications
# 1 = Send notifications
heartbeat = 1
# Set the frequency of the sms/email heartbeat notifications.
# Values can be set to any number and are in minutes.
# For reference;
# daily = 1439 minutes
# weekly = 10079 minutes
# Monthly = 43199 minutes
heartbeat_interval = 10079
The following instructions allow you to configure your raspberry pi to view graphs of sump pit activity through your web browser. This is accomplished by configuring a local webserver on your pi.
Once complete you will be able to view sump pump activity by connecting to http://ip_address_of_your_pi
If you have not done so in a while run the following command to update your Pi. This command updates repository information and then upgrades packages that are installed on your Pi. If you did this already earlier in the instructions then it is not necessary to do again.
sudo apt update && sudo apt -y upgrade
These instructions will install the Lighttpd webserver on your Pi
Install the Lighttpd webserver on your Raspberry Pi as follows.
sudo apt install lighttpd
Change to the web server root folder at /var/www/html
cd /var/www/html
Create the symlinks for your folders to be viewable with the web server. $USER will be replaced with your account name.
sudo ln -s /home/$USER/raspi-sump/web/index.html index.html
sudo ln -s /home/$USER/raspi-sump/web/css css
sudo ln -s /home/$USER/raspi-sump/web/images images
sudo ln -s /home/$USER/raspi-sump/charts charts
Enable directory listing for historical charts
sudo lighttpd-enable-mod dir-listing
Restart the web server
sudo systemctl restart lighttpd
Open a web browser to http://ip_of_your_pi. Having configured the rsumpwebchart.timer earlier, a new webchart will be created every 15 minutes for viewing. This will also copy historical information that you can access from the link in the web page.
If you find typing the systemctl commands cumbersome you can make it easier by creating aliases. An alias is shortcut you can type that will initiate a long command.
Aliases are added to the .bash_aliases file in your home folder as follows
cd /home/$USER
nano .bash_aliases
Copy and paste the following aliases for Raspi-Sump systemd commands in the file. Make sure there are no spaces at the beginning of each line after pasting.
alias sumpon="systemctl --user start raspisump && systemctl --user start rsumpwebchart.timer"
alias sumpoff="systemctl --user stop raspisump && systemctl --user stop rsumpwebchart.timer"
alias sumpstats="systemctl --user status raspisump"
alias sumpchartstats="systemctl --user status rsumpwebchart.timer"
alias sumpboot="systemctl --user enable raspisump && systemctl --user enable rsumpwebchart.timer"
alias sumpnoboot="systemctl --user disable raspisump && systemctl --user disable rsumpwebchart.timer"
alias sumprestart="systemctl --user restart raspisump"
Save the file, logout and log back in to activate the new aliases.
-
Start raspisump and rsumpwebchart.timer
sumpon -
Stop raspisump and rsumpwebchart.timer
sumpoff -
Show status of the raspisump service
sumpstats -
Show status of the rsumpwebchart timer
sumpchartstats -
Enable raspisump and rsumpchart.timer on boot
sumpboot -
Disable raspisump and rsumpchart.timer on boot
sumpnoboot -
Restart raspisump after making a
raspisump.conffile changesumprestart
For help with any issues that may arise, run the following command;
rsumpsupport
This will create a file support_date_time.txt in the /home/__username__/raspi-sump/support directory that can be attached to a support request.
For support open an issue on the Github Issue Tracker or consider joining our discord server.
For Discord simply send an email to alaudet@linuxnorth.org and request an invite link.