Pico Relay B

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Pico RTC DS3231
Pico RTC DS3231
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Overview

Industrial 8-Channel Relay Module For Raspberry Pi Pico, Power Supply Isolation, Photocoupler Isolation.

Features

  • Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal.
  • Onboard photocoupler isolation, prevent interference from external high-voltage circuit connected to the relay.
  • High-quality relay, contact rating: 10A 250V AC or ≤10A 30V DC.
  • ABS protection enclosure with rail-mount support, easy to install, safe to use.
  • Breakout USB port and BOOT pin, make it easy to debug without disassembling the enclosure.
  • PWR indicator, RGB LED, and passive buzzer outside the enclosure.

Specifications

  • Operating voltage: 5V
  • Communication Protocol: USB
  • Communication interface: Micro USB
  • Relay channel: 8 ch
  • Contact form: 1NO 1NC
  • Dimension: 88（H）x 122（V） mm

Pinout

Pico-Relay-B-details-inter.jpg

Pico User Guide

Hardware connection

Relay B Pico Description
VCC VSYS Power input
GND GND Ground
CH1 GP21 Control pin of Channel 1
CH2 GP20 Control pin of Channel 2
CH3 GP19 Control pin of Channel 3
CH4 GP18 Control pin of Channel 4
CH5 GP17 Control pin of Channel 5
CH6 GP16 Control pin of Channel 6
CH7 GP15 Control pin of Channel7
CH8 GP14 Control pin of Channel 8
RGB GP13 Control pin of RGB LED
BUZZER GP6 Control pin of buzzer

Connection

Pico-Relay-B-details-3.jpg
Download the SSCOM serial port debugging assistant and open it on the computer, open the corresponding port number, set the baud rate to 115200, and click the corresponding function to send the corresponding command.
Pico-Relay-B Guide003.jpg

Setup environment

1. For the Raspberry Pi environment setting, please refer to link.
2. For the Windows environment setting, please refer to link.

Raspberry Pi

1. Open a terminal of Raspberry Pi.
2. Download and unzip the demo codes to the directory Pico C/C++ SDK.

sudo apt-get install p7zip-full
cd ~
sudo wget  https://files.waveshare.com/upload/a/a1/Pico-Relay-B_code.7z
 
7z x Pico-Relay-B_code.7z -o./Pico-Relay-B_code
cd ~/Pico-Relay-B_code
cd c/build/

C

1. Hold the BOOTSEL button of Pico, and connect the USB interface of Pico to Raspberry Pi then release the button.
2. Go into the build directory and add the SDK path. 

cd ~/Pico-Relay-B_code/c/
cd build
export PICO_SDK_PATH=../../pico-sdk

3. Run the command cmake to generate the Makefile file. 

cmake ..

4. Run the command make to build and generate the executable file. 

make -j9

4. after building, a uf2 file is generated. Press and hold the button of the Pico board, connect it to Raspberry Pi by USB cable, and then release the button. Copy the main.uf2 file generated to the recognized movable disk (RPI-RP2). 

cp main.uf2 /media/pi/RPI-RP2/

Send hexadecimal commands to Relay via serial port for control of: 

01: Relay switch #1
02: No.2 relay switch
03: No.3 relay switch
04: Relay switch #4
05: No.5 relay switch
06: No.6 relay switch
07: No.7 relay switch
08: No.8 relay switch
09: Relay fully off
0A: Relay fully open

Python codes

Use in Windows

  • 1. Press and hold the BOOTSET button on the Pico board, connect the Pico to the USB port of the computer through the Micro USB cable, and release the button after the computer recognizes a removable hard disk (RPI-RP2).
  • 2. Copy the rp2-pico-20210418-v1.15.uf2 file in the python directory to the recognized removable disk (RPI-RP2).
  • 3. Open Thonny IDE (Note: Use the latest version of Thonny, otherwise there is no Pico support package, the latest version under Windows is v3.3.3).
  • 4. Click Tools -> Settings -> Interpreter, and select Pico and the corresponding port as shown in the figure.

Pico-lcd-0.96-img-config.png

  • 5. File -> Open -> the corresponding .py file, click to run, as shown in the following figure:

Pico-Thonny-v1.15.jpg

  • After running, you can send the command directly in the Shell, the command is as follows:
1: Relay switch No. 1
2: Relay switch No. 2
3: Relay switch No. 3
4: Relay switch No. 4
5: Relay switch No. 5
6: No. 6 relay switch
7: Relay switch No. 7
8: No. 8 relay switch
9: The relay is fully closed
10: The relay is fully open

Run in Raspberry Pi

  • Hold the BOOTSET key of the Pico board, then connect the Pico to Raspberry Pi by USB cable, then release the key.
  • Once the removable disk (RPI-RPI2) is recognized, copy the rp2-pico-20210418-v1.15.uf2 file to pico.
  • Open the Thonny IDE in Raspberry Pi, update it if it doesn't support Pico.
  • Configure the port by choosing MicroPython(Raspberry Pi and ttyACM0 port) in Tools -> Options... -> Interpreter.

Pico-lcd-0.96-img-config2.png
If your Thonny doesn't support Pico, you can update it with the following command:

sudo apt upgrade thonny
  • Choose File -> Open...-> python/ and select the corresponding .py file to run the codes.
  • After running, you can send the command directly in the Shell, the command is as follows:
1: Relay switch No. 1
2: Relay switch No. 2
3: Relay switch No. 3
4: Relay switch No. 4
5: Relay switch No. 5
6: No. 6 relay switch
7: Relay switch No. 7
8: No. 8 relay switch
9: The relay is fully closed
10: The relay is fully open


Document

Demo codes

Software

Support

If you require technical support, please go to the Support page and open a ticket.

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