Raspberry Pi - Edi Wang

06

OCT

Azure Remote Controlled Light with .NET Core 3.0 on Raspberry Pi

3 years ago, I wrote a blog post "Azure Remote Controlled Light with Windows 10 IoT Core", which is an experiment to sending a signal from your home and it will travel around the world then come back to your home to turn on an LED light on your Raspberry Pi. 3 years later, Windows 10 IoT Core and UWP seem not living so well. Microsoft doesn't have a new build of Windows 10 to support the latest …

29

SEP

Setup .NET Core 3.0 Runtime and SDK on Raspberry Pi 4

I recently bought a Raspberry Pi 4 with 4GB RAM and have official OS "Raspbian" installed. I've managed to run an ASP.NET Core 3.0 application on this Raspberry Pi 4. (02/23/2019 Update: It's recommended to choose .NET Core 3.1 LTS now, added 3.1 content into this article) ARM32 or ARM64? You can't run ARM64 version of .NET Core runtime or SDK on a Raspberry Pi 4 with the official Raspbian …

16

FEB

Azure Fire Alarm by Raspberry Pi and Windows 10 IoT Core

防火是日常生活中非常重要的意识，如果你是一只恩爱狗，出门在外，家里被FFF团点了，那真是太惨（hao）了。如果你恰好有Windows 10的设备，比如Lumia，Surface，能及时收到火警是至（mei）关（sha）重（luan）要（yong）的。今天就教大家如何用Microsoft Azure公有云+Windows 10 IoT Core在树莓派上实现一个远程火警系统。阅读这篇文章，你需要的前置知识： Windows 10，UWP的基本开发能力 MVVM基础知识 ASP.NET MVC的基础知识树莓派、GPIO及逻辑电路的基本知识（也就是大学里的计算机电路） Azure公有云的使用经验 ……当然，还要有对微软的信仰一、设计原理基本想法是，通过火焰传感器的输入信号，触发一个警报，把消息发送到Azure上的Notification …

11

AUG

Raspberry Pi Surveillance Camera with Linux and Azure

Because Windows 10 IoT Core is not supporting Pi Camera, I can only use Linux instead. These days, I made a surveillance camera, the functionality is simple, when a person passed by the camera, it will take a picture and upload to Microsoft Azure Storage. It also got a website to remotely view the photos. 1. Hardware A PIR Sensor, a Pi Camera, a couple of jump wires. Connect the Singal …

07

AUG

Raspberry Pi 3 and Windows 10 IoT Core Basics

最近有时间，总结了一下关于树莓派3及Windows 10 IoT的基础知识。适合没有接触过硬件但有一定编程经验的读者入门。我自己刚刚买树莓派的时候花了很长时间入门，搞清楚各种概念和属于。很多网上的帖子都是分散在各个角落的，并且是英文的，有些还是过时的，有些是爆的，所以我觉得有必要总结一篇基础入门帖子。这篇文章讲的都是抛砖引玉的概念，并不包括End-To-End的Case，想要做一个完整实验的文章，请看我博客的物联网开发系列文章：http://edi.wang/category/list/iot  如果有错误和补充，欢迎在评论里指出。一、树莓派3 树莓派是基于ARM芯片的卡片电脑，大小和一张信用卡一样。今年推出了第三代，集成了板载蓝牙和WIFI。之前的树莓派1和2都是需要用USB WIFI和蓝牙实现的，所以你要是购买树莓派，买3是最方便的，可以省去USB WIFI和蓝牙的配 …

06

AUG

How to use Windows RDP to connect Raspbian Linux

Because Windows 10 IoT Core is not yet ready to replace Raspbian, in some case, we have to use Linux. The remote operation on Linux is usually done by SSH. If you want remote desktop like the one on Windows. There are two options: tightvnc or xrdp. I used to  use tightvnc, it does not have any problem with daily use. But I have to install a tightvnc client on my PC. However, XRDP …

02

AUG

Windows 10 IoT: How to Drive an SSD1306 I2C Display

I bought a 128x64 0.96 inch OLED display, like this one: The driver chip for this screen is called SSD 1306, typically, this chip will have 2 layouts, SPI or I2C. However, the examples fo how to drive I2C with SSD 1306 is very rare, and they run on Raspbian not Windows. Luckly, with the help from a Microsoft Staff in US, we finally got the code to run the screen on Windows 10 IoT …

21

JUL

315MHz Remote Door Control by Windows 10 IoT

这几天我用树莓派实现了一个模仿车库遥控门的设备，分享给大家。（优酷视频 http://v.youku.com/v_show/id_XMTU3ODk1NDY2OA==.html )   一、遥控模块首先介绍一下我用的遥控器和接收板，这种遥控模块在中国随处可以买到，基本都是长这样的。很多卷帘门、车库门都是用这种遥控模块的。做无线电实验购买的是非锁的版本，注意最好同时购买天线。天线用的是50欧姆单芯导线，其实就是个铜丝，注意购买时候要看好频率，中国大陆的无线电许可频率是315MHz，国外也有用443MHz的，我买的遥控器是315MHz。注意遥控器发射频率和接收频率要匹配就行。遥控接收端芯片是PT2272-M4，M4的意思是点动模式，即按住遥控器按钮输出高电平，松开停止输出。遥控板的ANT端焊接天线，方向要是竖直向上的（相对你的设备）。遥控板的接口有7 …

10

JUN

Reed Controlled Light by Windows 10 IoT Core

Reed switch is an electronic component to connect / disconnect the switch by magnetic field. When it touchs magnetic field, the two iron sheets inside the tube will clip together, so the switch is connected.  The application of Reed Swith： Door light controller: When you open the door, turn the light on. When you close the door, turn off the light. This is simply install a reed switch on …

29

APR

74HC595 4 Digits LED Tube with Windows 10

One of the common used LED Tube driver chip is 74HC595, by using the Chip, you can save GPIO ports. I bought a LED Tube with 595 chip, it only need 3 GPIO ports to display 4 digits. However there is no existing posts about how to drive the 74HC595 LED Tube from Windows 10. So I can only try for myself. 1. Physical Connection VCC to DC3.3 power, GND to Ground, DIO to GPIO27 (you can change it, …

04

APR

Using stepper motor in Windows 10 IoT Core

如果你需要精确控制设备的转动角度，普通电机是做不到的，通常我们会选用步进马达。比如28BYJ-48这个型号的，很容易买到。步进马达得配合驱动板使用，最常用的是ULN2003芯片的驱动板，就像下图。不过注意，你买到的驱动板长相可能不太一样，不过没关系，只要芯片上写的是ULN2003，就可以使用，它们的接口都是一样的。关于步进马达的原理，可以看这篇： https://en.wikipedia.org/wiki/Stepper_motor  拿到驱动板和步进马达后，将马达插入驱动板的白色插槽中，这个接口有防呆设计，所以不会插反。关于Windows 10 IoT如何驱动步进马达，有一篇很好的英文材料： https://www.hackster.io/erickbp/stepper-motor-and-windows-10-iot-core-d3c5d6 我 …

03

APR

Sound Controlled Light by Windows 10 IoT Core

In many buildings, there are sound controlled light in use. When you clap your hands, the light turns on. Now, with Raspberry Pi 3 and Windows 10 IoT, we can make a sound controlled light ourselves. The sound sensor I use is FC-04. As other sensors, the first step is calibration. 1. Calibration for FC-04 Sound Sensor In quiet environment. Connect VCC to DC 3.3V，GND to Ground. At that time, …

02

APR

Windows 10 IoT开发：HC-04超声波传感器测距（树莓派3）

HC-04是树莓派上用的比较广泛的超声波传感器，可以用来测量设备和物体之间的距离。可惜网上的资料很少有针对Windows 10的，几乎都是Python和C在Linux上的例子。 hackster.io上有一篇用HC-04做雷达的例子，但是设计的部件太多了，对单纯学习HC-04传感器的使用来说这个例子比较复杂。搜了一圈，英文资料最好的是这篇：http://www.guruumeditation.net/en/digital-io-with-windows-10-iot-raspberry-pi-2-and-the-ultrasonic-ranging-module-hc-sr04/ 国内中文资料介绍Windows 10上HC-04传感器的文章似乎还没有，所以就简单总结一下步骤。一、物理连接对于没有多少物理和电子知识基础的人（比如我）来说，第一步连线是比较难的。很多文章 …

28

MAR

Windows 10 IoT Development: Moisture Sensor for Raspberry Pi 3

I bought a moisture sensor like this recently. After some research, there seem no articles to indicate how to use it in Windows 10. So I figured out myself. This sensor has 4 Pins, which are: PIN Usage AO Analog Out DO  Digital Out GND  Ground  VCC  Power So, let's connect VCC to DC3.3v on RPi, I use PIN 01. Connect GND to any ground …

26

MAR

GY-30 (BH1750FVI) Light Sensor with Windows 10 IoT

I purchased a GY-30 light sensor recently, this model is also known as "BH1550FVI". There seems no sample for this sensor on Windows 10 yet, so I tried to make one. The light sensor looks like this: My board is a Raspberry Pi 3, the GPIO layout is shown in this table: Because GY-30 is an I2C device, so we can not use GPIO to drive it directly, we must use the I2C ports. In addition, …

10

MAR

Azure Remote Controlled Light with Windows 10 IoT Core

For those who have watched the "Big Bang Theory", you would probably remember that those physicists build an Internet controlled lamp. The signal send from their laptop traveled around the world and come back to their house to light up the lamp. Now, with Windows 10 IoT Core and Microsoft Azure, we could also achieve the same thing on a Raspberry Pi 3. First, I strongly recommend you …