Tilt Sensor

Tilt Sensor Tilt Sensor

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Primary Attribute Category: Sensor, Modules {{{userDefinedInfo}}}: {{{userdefinedvalue}}} Brand: Waveshare

Website International: Waveshare website Chinese: 官方中文站点

Onboard Interfaces I/Os

Related Products

Overview

Specifications

• Voltage: 3C ~ 5.5V
• Output Type: TTL
• Dimension: 53.0mm * 18.0mm
• Fixed Hole Dimension: 2.00mm

Principle: The tilt sensor is essentially a ball switch that closes and loosens when the environment it is in vibrates or tilts.

Applications

• Shake detection
• Guard alarm
• Smart car
• Electric bricks

Pinouts

• VCC ↔ 3.0V ~ 5.5V
• GND ↔ power supply ground
• DOUT ↔ MCU.IO (digital output)

Get Started at Pico

Pico Getting Started

Firmware Download

• MicroPython Firmware Download

• C_Blink Firmware Download

Introduction

Raspberry Pi Pico Basics

MicroPython Series

Install Thonny IDE

In order to facilitate the development of Pico/Pico2 boards using MicroPython on a computer, it is recommended to download the Thonny IDE

• Download Thonny IDE and follow the steps to install, the installation packages are all Windows versions, please refer to Thonny's official website for other versions
  • Thonny IDE official download link
  • Thonny IDE download link
  • Thonny official website
• After installation, the language and motherboard environment need to be configured for the first use. Since we are using Pico/Pico2, pay attention to selecting the Raspberry Pi option for the motherboard environment
  

• Configure MicroPython environment and choose Pico/Pico2 port
  
  • Connect Pico/Pico2 to your computer first, and in the lower right corner of Thonny left-click on the configuration environment option --> select Configture interpreter
  • In the pop-up window, select MicroPython (Raspberry Pi Pico), and choose the corresponding port

Flash Firmware

• Click OK to return to the Thonny main interface, download the corresponding firmware library and burn it to the device, and then click the Stop button to display the current environment in the Shell window
• Note: Flashing the Pico2 firmware provided by Micropython may cause the device to be unrecognized, please use the firmware below or in the package
  • Pico firmware library
  • Pico2 firmware library
• How to download the firmware library for Pico/Pico2 in windows: After holding down the BOOT button and connecting to the computer, release the BOOT button, a removable disk will appear on the computer, copy the firmware library into it
• How to download the firmware library for RP2040/RP2350 in windows: After connecting to the computer, press the BOOT key and the RESET key at the same time, release the RESET key first and then release the BOOT key, a removable disk will appear on the computer, copy the firmware library into it (you can also use the Pico/Pico2 method)
  

MicroPython Series

【MicroPython】 machine.Pin class function details
【MicroPython】machine.PWM class function details
【MicroPython】machine.ADC class function details
【MicroPython】machine.UART class function details
【MicroPython】machine.I2C class function details
【MicroPython】machine.SPI class function details
【MicroPython】rp2.StateMachine class function details

C/C++ Series

For C/C++, it is recommended to use Pico VS Code for development. This is a Microsoft Visual Studio Code extension designed to make it easier for you to create, develop, and debug projects for the Raspberry Pi Pico series development boards. No matter if you are a beginner or an experienced professional, this tool can assist you in developing Pico with confidence and ease. Here's how to install and use the extension.

• Official website tutorial: https://www.raspberrypi.com/news/pico-vscode-extension/
• This tutorial is suitable for Raspberry Pi Pico, Pico2 and the RP2040 and RP2350 series development boards developed by Waveshare
• The development environment defaults to Windows. For other environments, please refer to the official tutorial for installation

Install VSCode

1. First, click to download pico-vscode package, unzip and open the package, double-click to install VSCode
   
   Note: If vscode is installed, check if the version is v1.87.0 or later
   
   

Install Extension

1. Click Extensions and select Install from VSIX
   
   
2. Select the package with the vsix suffix and click Install
   
   
3. Then vscode will automatically install raspberry-pi-pico and its dependency extensions, you can click Refresh to check the installation progress
   
   
4. The text in the right lower corner shows that the installation is complete. Close VSCode
   

Configure Extension

1. Open directory C:\Users\username and copy the entire .pico-sdk to that directory
   
   
2. The Copy is completed
   
   
3. Open vscode and configure the paths for the Raspberry Pi Pico extensions
   
   The configuration is as follows:

   Cmake Path:
   ${HOME}/.pico-sdk/cmake/v3.28.6/bin/cmake.exe
   
   Git Path:
   ${HOME}/.pico-sdk/git/cmd/git.exe    
   
   Ninja Path:
   ${HOME}/.pico-sdk/ninja/v1.12.1/ninja.exe
   
   Python3 Path:
   ${HOME}/.pico-sdk/python/3.12.1/python.exe             
   

New Project

1. The configuration is complete, create a new project, enter the project name, select the path, and click Create to create the project
   To test the official example, you can click on the Example next to the project name to select
   
   
2. The project is created successfully
   
   
3. Select the SDK version
   
   
4. Select Yes for advanced configuration
   
   
5. Choose the cross-compilation chain, 13.2.Rel1 is applicable for ARM cores, RISCV.13.3 is applicable for RISCV cores. You can select either based on your requirements
   
   
6. Select default for CMake version (the path configured earlier)
   
   
7. Select default for Ninjaversion
   
   
8. Select the development board
   
   
9. Click Complie to compile
   
   
10. The uf2 format file is successfully compiled
    
    

Import Project

1. The Cmake file of the imported project cannot have Chinese (including comments), otherwise the import may fail
2. To import your own project, you need to add a line of code to the Cmake file to switch between pico and pico2 normally, otherwise even if pico2 is selected, the compiled firmware will still be suitable for pico
   set(PICO_BOARD pico CACHE STRING "Board type")

Update Extension

1. The extension version in the offline package is 0.15.2, and you can also choose to update to the latest version after the installation is complete
   
   

Arduino IDE Series

Install Arduino IDE

1. First, go to Arduino official website to download the installation package of the Arduino IDE.
   
2. Here, you can select Just Download.
   
3. Once the download is complete, click Install.
   
   Notice: During the installation process, it will prompt you to install the driver, just click Install
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Arduino IDE Interface

1. After the first installation, when you open the Arduino IDE, it will be in English. You can switch to other languages in File --> Preferences, or continue using the English interface.
   
2. In the Language field, select the language you want to switch to, and click OK.
   

Install Arduino-Pico Core in the Arduino IDE

1. Open the Arduino IDE, click on the file in the top left corner, and select Preferences
   
2. Add the following link to the attached board manager URL, and then click OK

   https://github.com/earlephilhower/arduino-pico/releases/download/4.0.2/package_rp2040_index.json

   
   Note: If you already have an ESP32 board URL, you can use a comma to separate the URLs as follows:

   https://dl.espressif.com/dl/package_esp32_index.json,https://github.com/earlephilhower/arduino-pico/releases/download/4.0.2/package_rp2040_index.json

3. Click Tools > Development Board > Board Manager > Search pico, as my computer has already been installed, it shows that it is installed
   
   

Upload Demo at the First Time

1. Press and hold the BOOTSET button on the Pico board, connect the pico to the USB port of the computer via the Micro USB cable, and release the button after the computer recognizes a removable hard disk (RPI-RP2).
   
2. Download the program and open D1-LED.ino under the arduino\PWM\D1-LED path
3. Click Tools --> Port, remember the existing COM, do not click this COM (the COM displayed is different on different computers, remember the COM on your own computer)
   
4. Connect the driver board to the computer using a USB cable. Then, go to Tools > Port. For the first connection, select uf2 Board. After uploading, when you connect again, an additional COM port will appear
   
5. Click Tools > Development Board > Raspberry Pi Pico > Raspberry Pi Pico or Raspberry Pi Pico 2
   
   
6. After setting it up, click the right arrow to upload the program
   

• If issues arise during this period, and if you need to reinstall or update the Arduino IDE version, it is necessary to uninstall the Arduino IDE completely. After uninstalling the software, you need to manually delete all contents within the C:\Users\[name]\AppData\Local\Arduino15 folder (you need to show hidden files to see this folder). Then, proceed with a fresh installation.

Open Source Demos

MircoPython video demo (github)
MicroPython firmware/Blink demos (C)
Raspberry Pi official C/C++ demo (github)
Raspberry Pi official micropython demo (github)
Arduino official C/C++ demo (github)

Hardware Connection

Sensor	Pico	Description
VCC	3.3V	Power input
GMD	GND	Power ground
DOUT	GP22	Digital output

Download examples

Use the Raspberry Pi as the host device. Open a terminal and run the following commands to download the example.

sudo apt-get install p7zip-full
cd ~
sudo wget  https://files.waveshare.com/upload/b/b6/Tilt-Sensor-code.7z
7z x Tilt-Sensor-code.7z -o./Tilt-Sensor-code
cd ~/Tilt-Sensor-code
cd Pico/c/build/

Examples

C codes

• Go into the c directory.

cd ~/Tilt-Sensor-code/Pico/c/build

• Add the path of SDK.

export PICO_SDK_PATH=../../pico-sdk

Note that if the path of your SDK is different, you need to modify the command and use the correct path to export

• Generate Makefile and build.

cmake ..
make -j9

• After building, a uf2 file is generated.
• Press and hold the button of Pico, connect it to Raspberry Pi then release the button.
• Copy/Drag the uf2 file to the portable disk (RPI-RP2) recognized.

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

Micropython codes

Windows

• 1. Press the BOOTSET key on the Pico board, connect the Pico to the USB port of the PC with a Micro USB cable, and release the button after the computer recognized a movable disk (RPI-RP2).
• 2. Copy the Rp2-pico-20210418-v1.15.7z file from the Python directory to a recognized removable disk (RPI-RP2).
• 3. Open the Thonny IDE (Note: use the latest version of Thonny, otherwise there is no support package for Pico, the current latest version for Windows is v3.3.3).
• 4. Click Tools -> Settings -> Interpreter, and select Pico and the corresponding port as shown in the picture.

It also provides a demo.

• 5. File -> Open -> Tilt Sensor.py, click to run as shown below:

Raspberry Pi

• Flash the Micropython firmware first.
• Open the Thonny IDE (Menu->Programming->Thonny Python IDE).
• 【Optiional】If the Thonny IDE in the Raspberry Pi is not the new version that supports Pico, please upgrade it first.

sudo apt upgrade thonny

• Configure Interpreter, choose Tools -> Options... -> Interpreter, choose MicroPython (Raspberry Pi Pico) and the ttyACM0 port.

• Click File -> Open.. and browser the micro python codes (Tilt Sensor.py) to run the codes.

Expected result

• When the module is shaken or tilted, the signal indicator on the module is on, and when the module is placed in parallel, the signal indicator on the module is off.

The STM32 examples are based on the STM32F103RBT6 and the STM32H743. The connection provided below is based on the STM32F103RB. If you need to use other STM32 boards, you may need to change the hardware connection and port the code yourself.

STM32

Hardware Connection

Sensor	STM32	Description
VCC	3.3V	Power input
GND	GND	Power ground
DOUT	PA4	Digital output

Examples

The demo is developed based on the HAL library. Please download the program inside the material, find the STM32 program file directory, open the Tilt-Sensor-code\STM32\STM32F103RB\MDK-ARM directory of Tilt Sensor.uvprojx, and you can see the program.

Open main.c and recompile to download.

• After downloading, run SSCOM to connect the Tilt module, and you can see the sensor status.

When shake or tilt the module, the signal indicator on the module is on. When placing the module, the signal indicator on the module is off. The Arduino example is written for the Arduino UNO. If you want to connect it to other Arduino boards, you may need to change the connection.

Arduino

Hardware connection

Sensor	Arduino	Description
VCC	5V	Power input
GND	GND	Power ground
DOUT	D2	Digital output

Examples

• Download the demo codes to your PC and unzip.
• Install the Arduino IDE on your PC.
• Go into Tilt-Sensor-code/Arduino/Tilt_Senso.
• Run the Tilt_Sensor.ino file.
• Select the correct Board and the Port.

• Build the project and upload it to the board.
• Open the serial monitor of the Arduino IDE or the SSCOM software and check the serial data.

Resources

• User Manual
• Schematic
• Demo Code
• Software

FAQ

Question:How does the tilt sensor work?

 Answer:

This vibrating sensor is essentially an application of mercury switch. In a condition of vibrating or tilting, the sensor may enable the switch to close or loose.

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Question:What other choices do I have?

 Answer:

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