raspberry-pi3

问题 I am currently realizing a project in C # on a Raspberry Pi 3. On the Pi, Windows runs IoT Core in the latest stable release release (v.10.0.16299.309). When I initiate the PWM pins, the method runs in an exception (System.Runtime.InteropServices.SEHException: 'External component raised an exception.'). All rights are set and all releases are set on the Windows Fall Creators Update. Can someone be with me. Thank you. here the Code: private async void StartPWM() { GpioController gpioController

问题 I see a ton of info about piping a raspivid stream directly to FFMPEG for encoding, muxing, and restreaming but these use cases are mostly from bash; similar to: raspivid -n -w 480 -h 320 -b 300000 -fps 15 -t 0 -o - | ffmpeg -i - -f mpegts udp://192.168.1.2:8090ffmpeg I'm hoping to utilize the functionality of the Picamera library so I can do concurrent processing with OpenCV and similar while still streaming with FFMPEG. But I can't figure out how to properly open FFMPEG as subprocess and

问题 I see a ton of info about piping a raspivid stream directly to FFMPEG for encoding, muxing, and restreaming but these use cases are mostly from bash; similar to: raspivid -n -w 480 -h 320 -b 300000 -fps 15 -t 0 -o - | ffmpeg -i - -f mpegts udp://192.168.1.2:8090ffmpeg I'm hoping to utilize the functionality of the Picamera library so I can do concurrent processing with OpenCV and similar while still streaming with FFMPEG. But I can't figure out how to properly open FFMPEG as subprocess and

问题 I have the same code with a lower version (9.4.0) working on the phone but for some reason it won't work on RPi3? My build.gradle compile 'com.google.android.gms:play-services:10.0.0' provided 'com.google.android.things:androidthings:0.4-devpreview' The manifest permissions <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" /> The method private void getWeather() { // Check for permission first if

问题 I'm using MySQL server version: 10.1.23-MariaDB-9+deb9u1 Raspbian 9.0 on a Raspberry Pi. This is my /etc/mysql/my.cnf : # The MariaDB configuration file # # The MariaDB/MySQL tools read configuration files in the following order: # 1. "/etc/mysql/mariadb.cnf" (this file) to set global defaults, # 2. "/etc/mysql/conf.d/*.cnf" to set global options. # 3. "/etc/mysql/mariadb.conf.d/*.cnf" to set MariaDB-only options. # 4. "~/.my.cnf" to set user-specific options. # # If the same option is

问题 I am trying to run the following example code using my NetBeans IDE: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <dbus/dbus.h> int main() { DBusConnection *connection = NULL; DBusError error; char buffer[1024]; dbus_error_init(&error); connection = dbus_bus_get(DBUS_BUS_SESSION, &error); if (dbus_error_is_set(&error)) { fprintf(stderr, "%s", error.message); abort(); } puts("This is my unique name"); puts(dbus_bus_get_unique_name(connection)); fgets(buffer, sizeof

问题 I'm developing a Tensorflow embedded application using TF lite on the Raspberry Pi 3b, running Raspbian Stretch. I've converted the graph to a flatbuffer (lite) format and have built the TFLite static library natively on the Pi. So far so good. But the application is Python and there seems to be no Python binding available. The Tensorflow Lite development guide (https://www.tensorflow.org/mobile/tflite/devguide) states "There are plans for Python bindings and a demo app." Yet there is wrapper

问题 What is the easiest way compile OpenCV 3.* for Windows 10 IoT Core ARM (Raspberry Pi) using Visual Studio hosted on Windows OS? Can I use DNN (Deep Neural Network) module among other contrib modules? 回答1: I struggled a bit trying to compile OpenCV 3.4.1 for Windows 10 IoT Core (10.0.16299.0) running on Raspberry Pi 3, so I decided to share my experience with the community. Requirements All you need to proceed is: OpenCV sources (from Github). opencv for core functionality and opencv_contrib

问题 I am using Raspberry pi3 and DHT11 sensor for temperature monitoring project. I have following pin positions VCC to pin no : 2 Ground to pin no : 6 Output to GPIO : BCM22 i.e pin no 15 Code that I have used: public class WeatherStationActivity extends Activity { private Handler mHandler = new Handler(); private TextView mTxtStatus; private PeripheralManagerService service = new PeripheralManagerService(); private Gpio tempGpio; private int i = 0; int[] dht11_dat = {0, 0, 0, 0, 0}; @Override

问题 There are samples of using RPi camera, but none of them are useful. I have added permissions in the manifest file, but still the output is showing : No cameras found . Why? 02-22 19:24:42.936 2134-2134/com.example.androidthings.doorbell D/DoorbellActivity: Doorbell Activity created. 02-22 19:24:43.131 2134-2134/com.example.androidthings.doorbell I/CameraManagerGlobal: Connecting to camera service 02-22 19:24:43.135 2134-2134/com.example.androidthings.doorbell D/DoorbellCamera: No cameras