Difference between revisions of "RPi Relay Board (B)"
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* [[:File:RPi_Relay_Board_(B)_Schematic.pdf|Schematic]] | * [[:File:RPi_Relay_Board_(B)_Schematic.pdf|Schematic]] | ||
* [https://www.waveshare.com/w/upload/c/c2/RPi_Relay_Board_B.7z Demo Code] | * [https://www.waveshare.com/w/upload/c/c2/RPi_Relay_Board_B.7z Demo Code] | ||
+ | ==Others== | ||
+ | * [https://github.com/SimonCahill/waveshare_8ch_relay_examples Examples shared by Simon] | ||
==Related Guides== | ==Related Guides== | ||
* [[Libraries Installation for RPi]] | * [[Libraries Installation for RPi]] |
Revision as of 12:57, 14 October 2022
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Introduction
We provide Raspberry Pi and Jetson Nano demo for this module
Interface introduce
The correspondence between relay channels and Pi pins:
Channel number | RPi pin number | wiringPi | BCM | Description |
Channel label | 29 | P21 | 5 | Channel 1 |
Channel label | 31 | P22 | 6 | Channel 2 |
Channel label | 33 | P23 | 13 | Channel 3 |
Channel label | 36 | P27 | 16 | Channel 4 |
Channel label | 35 | P24 | 19 | Channel 5 |
Channel label | 38 | P28 | 20 | Channel 6 |
Channel label | 40 | P29 | 21 | Channel 7 |
Channel label | 37 | P25 | 26 | Channel 8 |
【Note】The silk screen marking on the PCB corresponds to the BCM code.
The use of yellow jumpers
Relay_JMP is the relay control pin selection jumpers. When the jumpers are connected, the Raspberry Pi can be used to control the relays.
Using with Raspberry Pi
Install library
BCM2835
# Open the Raspberry Pi terminal and run the following commands wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.68.tar.gz tar zxvf bcm2835-1.68.tar.gz cd bcm2835-1.68/ sudo ./configure && sudo make && sudo make check && sudo make install # For more information, please refer to the official website: http://www.airspayce.com/mikem/bcm2835/
WiringPi
# Open the Raspberry Pi terminal and run the following commands sudo apt-get install wiringpi #For Raspberry Pi systems after May 2019 (If your system is earlier than this before, you may not need to execute), you may need to upgrade: wget https://project-downloads.drogon.net/wiringpi-latest.deb sudo dpkg -i wiringpi-latest.deb gpio -v # Run gpio -v and version 2.52 will appear. If it does not appear, the installation is wrong # Bullseye branch system use the following command: git clone https://github.com/WiringPi/WiringPi cd WiringPi ./build gpio -v # Run gpio -v and version 2.60 will appear. If it does not appear, it means that there is an installation error
Python
# python2 sudo apt-get update sudo apt-get install python-pip sudo pip install RPi.GPIO # python3 sudo apt-get update sudo apt-get install python3-pip sudo pip3 install RPi.GPIO
Test demo
Execute the following commands on the terminal, download the demo and extract it to the specified directory
wget https://www.waveshare.com/w/upload/b/b4/RPi_Relay_Board_B.zip unzip -o RPi_Relay_Board_B.zip -d ./RPi_Relay_Board_B sudo chmod 777 -R RPi_Relay_Board_B cd RPi_Relay_Board_B/RaspberryPi/
BCM2835 demo
Enter the Linux terminal and execute the following command in the terminal:
cd bcm2835 make sudo ./Relay_demo
Expected result: The relays on the module are closed in turn, and then disconnected in turn. Each relay has a corresponding indicator light, which can be known by observing the status of the indicator light. When the user wants to stop running the program, press Ctrl+C to stop the running of the program
WiringPi demo
Enter the Linux terminal and execute the following command in the terminal:
cd wiringPi make sudo ./Relay_demo
Expected result: The relays on the module are closed in turn, and then disconnected in turn. Each relay has a corresponding indicator light, which can be known by observing the status of the indicator light. When the user wants to stop running the program, press Ctrl+C to stop the running of the program
Python demo
Enter the Linux terminal and execute the following command in the terminal:
cd python sudo python Relay_demo.py
Expected result: The relays on the module are closed in turn, and then disconnected in turn. Each relay has a corresponding indicator light, which can be known by observing the status of the indicator light. When the user wants to stop running the program, press Ctrl+C to stop the running of the program
Web control
The web page control of this demo is based on the python web framework to control the relay.
Enter the Linux terminal and execute the following command in the terminal:
sudo apt-get install python-bottle cd python-bottle sudo python main.py
Enter the IP address of the Raspberry Pi in the address bar of Google Chrome (other browsers may not be compatible), port number 8080
Using with Jetson nano
Install library
sudo apt-get update sudo apt-get install python3-pip sudo pip3 install Jetson.GPIO sudo groupadd -f -r gpio sudo usermod -a -G gpio your_user_name sudo cp /opt/nvidia/jetson-gpio/etc/99-gpio.rules /etc/udev/rules.d/ sudo udevadm control --reload-rules && sudo udevadm trigger
Test demo
Download the program and enter the specified directory
sudo apt-get install p7zip wget https://www.waveshare.com/w/upload/c/c2/RPi_Relay_Board_B.7z 7zr x RPi_Relay_Board_B.7z -r -o./RPi_Relay_Board_B sudo chmod 777 -R RPi_Relay_Board_B cd RPi_Relay_Board_B/JetsonNano/
C demo
Enter the Linux terminal and execute the following command in the terminal:
cd C make sudo ./main
Expected result: The relays on the module are closed in turn, and then disconnected in turn. Each relay has a corresponding indicator light, which can be known by observing the status of the indicator light. When the user wants to stop running the program, press Ctrl+C to stop the running of the program
Python demo
Enter the Linux terminal and execute the following command in the terminal:
cd python sudo python relay_demo.py
Expected result: The relays on the module are closed in turn, and then disconnected in turn. Each relay has a corresponding indicator light, which can be known by observing the status of the indicator light. When the user wants to stop running the program, press Ctrl+C to stop the running of the program
Web control
The web page control of this demo is based on the python web framework to control the relay.
Enter the Linux terminal and execute the following command in the terminal:
sudo apt-get install python-bottle cd python-bottle sudo python main.py
Enter the IP address of the Raspberry Pi in the address bar of Google Chrome (other browsers may not be compatible), port number 8080
Resources
Others
Related Guides
FAQ
Support
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