smetronic

sudo apt install build-essential

sudo apt install qtcreator

sudo apt install qt-5 defaut

sudo apt install qt5-doc qt5-doc-html qtbase5-doc-html qtbase5-examples

sudo apt-get install qtdeclarative5-dev

smetronic

Installing Network Manager on Raspbian 2020-02-05

Default Raspbian is not able to connect to wifi networks using corporate security setups, including eduroam. However, the issue is that the packaged networking control widget does not expose the relevant security features, rather than any underlying hardware limitation. The solution has long been to install Network Manager and configure it to handle the wifi interface.

Unfortunately, previous installation approaches didn't work for me on the Raspbian 2020-02-06 image. Following a fresh install, the below is what I did to make it work. Note that this is actually simpler than previous recipes.

Install packages

sudo apt update
sudo apt install network-manager network-manager-gnome

smetronic

sudo apt install apt-transport-https dirmngr gnupg ca-certificates
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb https://download.mono-project.com/repo/debian stable-raspbianbuster main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update

sudo apt install mono-devel
sudo apt install mono-complete

sudo apt-get install -y mono-xbuild
sudo apt-get install gtk-sharp2

smetronic

#include <Wire.h>
#define SLAVE_ADDRESS 0x2A

void setup() {
    // initialize i2c as slave
    Wire.begin(SLAVE_ADDRESS);
    Wire.onRequest(sendData); 
}

void loop() {

smetronic

public static DateTime ToTimeZoneTime(DateTime time, string timeZoneId = "UTC")
{
    TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
    return TimeZoneInfo.ConvertTimeFromUtc(time, tzi);
}

public static DateTime ToUTC(DateTime time, string timeZoneId = "UTC")
{
    TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
    return TimeZoneInfo.ConvertTimeToUtc(time, tzi);

smetronic

#Step 1: update the system

sudo apt-get update
sudo apt-get upgrade

#Next we need to install Pycharm. You can install Pycharm using different methods. Here we are using the snap packages to install Pycharm Community Edition. 

sudo snap install pycharm-professional --classicc

smetronic

List of Libraries availabe below
OpenCV for python 2 and 3
Fswebcam
MQTT
DHT11 Sensor
PyautoGUI
Tkinter
Xlib
espeak
Festival

smetronic

 var vm = new { label = item.PlateNo, asset = item.AssetCode, rfid = "12345678" };

  using (var client = new WebClient())
  {
      var dataString = JsonConvert.SerializeObject(vm);
      client.Headers.Add(HttpRequestHeader.ContentType, "application/json");
     // client.Headers.Add(HttpRequestHeader.Accept, "application/json");

      var res = client.UploadString(new Uri($"http://xx.xx.xx.xx/casper/api/FCS/SecondaryTag?key={key}"), "POST", dataString);

smetronic

JObject jObjectbody = new JObject();
jObjectbody.Add("label", item.PlateNo);
jObjectbody.Add("asset", item.AssetCode);
jObjectbody.Add("rfid", item.RFID);

var baseAddress = $"http://xx.xx.xx.xx/casper/api/FCS/SecondaryTag?key={userModel.Session}";

var http = (HttpWebRequest)WebRequest.Create(new Uri(baseAddress));
http.Accept = "application/json";
http.ContentType = "application/json";

smetronic

#include <EEPROM.h>

uint8_t rx_buffer[10];
uint8_t rx_mem[10];

void setup() {
	Serial.begin(115200);
	loadStruct(&rx_mem, sizeof(rx_mem)); // Load data from EEPROM into array.
}