Projekt IoT

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IoT - Internet of Things

some project ideas and notes regarding Arduino, ESP8266, ESP32 and other micro controllers

  • Arduino Nano with 433 MHz data transfer
  • ESP-01 for shutter control
  • ESP-12 for LED switch
  • ESP-12 for laundry room air control
  • SonOff with own firmware and tasmota devices
 https://github.com/arendst/Sonoff-Tasmota/wiki

Arduino IDE Inofficial Boards

look here for an overview:

ATTiny

Most ATTinys: https://github.com/SpenceKonde/ATTinyCore

Wiring

https://startingelectronics.org/tutorials/AVR-8-microcontrollers/ATtiny2313-tutorial/P8-TC0-polled-timer/ATTINY2313-TC0-polled.png

  • Vcc can also be 3.3V
  • C1 can have bigger capacity for unstable voltage
  • R1 can be higher values

Programmer

I have an USBasp. Program with avrdude. Works integrated in Arduino IDE. Ignore warning "avrdude: warning: cannot set sck period. please check for usbasp firmware update.".

Numbering of Connector is 

1 3 5 7 9
2 4 6 8 10

Need to connect Vcc, Gnd, Miso(1), Mosi, Reset and Sck

New chip needed 0.5MHz for correct timing with delay()

Needed to add this udev rule 

echo 'SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="05dc", GROUP="dialout", MODE="0660"' | sudo sh -c 'cat >/etc/udev/rules.d/50-USBasp.rules'

ESP8266

https://github.com/esp8266/Arduino

Domoticz

This is a home automation system that is natively supported by tasmota devices via mqtt

Installation

Old Repo
sudo /usr/sbin/useradd -U -g domoticz -m -r domoticz
  • Edit section Service in /usr/lib/systemd/system/domoticz.service (ports, logging, db)
[Service]
ExecStart=/opt/domoticz/domoticz -notimestamps -syslog -www 8888 -sslwww 4343 -dbase domoticz.db
WorkingDirectory=/home/domoticz
User=domoticz
Group=domoticz
Restart=always
  • Activate new service file, start domoticz and check status
sudo systemctl daemon-reload
sudo systemctl enable domoticz
sudo systemctl start domoticz
sudo systemctl status domoticz
Self Compiled

domoticz.service 

[Unit]
Description=Domoticz 4 (JoBa Edition)
Wants=nss-lookup.target
After=network.target

[Service]
PIDFile=/run/domoticz/domoticz.pid
#ExecStart=/opt/domoticz/domoticz -daemon -syslog -log /var/log/domoticz.log -www 8080 -sslwww 8443
ExecStart=/opt/domoticz/domoticz -daemon -syslog -log /var/log/domoticz.log -pidfile /run/domoticz/domoticz.pid -www 8888 -sslwww 8443
ExecReload=/bin/kill -HUP $MAINPID
ExecStop=/bin/kill -KILL $MAINPID
User=domoticz
Group=domoticz

[Install]
WantedBy=multi-user.target

In domoticz.spec adapt APPVERSION, APPHASH and Version prefix 

#
# spec file for package domoticz
#
# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
# Copyright (c) 2014-2016 Guillaume GARDET <guillaume@opensuse.org>
# Copyright (c) 2018 Joachim Banzhaf <joachim.banzhaf@gmail.com>
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.

# Please submit bugfixes or comments via http://bugs.opensuse.org/
#

#
# Hash can be found on Github, select tag, look for "Last commit xxxx" under the Clone/Download button
#

%define APPVERSION 9700
%define APPHASH 2772d9f

Name: domoticz
Summary: Domoticz is a very light weight Home Automation System
Version: 4.%{APPVERSION}
Release: 0
License: GPL-3.0+
Group: Productivity/Other
Url: http://www.domoticz.com/
Source0: %{name}-%{version}.tar.gz
Source1: domoticz.service
BuildRoot: %{_tmppath}/%{name}-%{version}-build
BuildRequires: cmake
BuildRequires: gcc-c++
BuildRequires: pkgconfig
BuildRequires: fdupes
BuildRequires: openssl-devel
BuildRequires: python3-devel
BuildRequires: boost-devel >= 1.55
BuildRequires: curl-devel
BuildRequires: libusb-devel
BuildRequires: openzwave
BuildRequires: libopenzwave-devel
BuildRequires: libudev-devel
BuildRequires: git
BuildRequires: sqlite
BuildRequires: sqlite-devel
BuildRequires: python3-devel
Requires: sqlite
Requires: python3-devel
BuildRequires: systemd-rpm-macros
%{?systemd_requires}

%description
Domoticz is a very light weight Home Automation System that lets you monitor and
configure various devices like: Lights, Switches, various sensors/meters like
Temperature, Rain, Wind, UV, Electra, Gas, Water and much more.
Notifications/Alerts can be sent to any mobile device. Supported platforms:
Package for openSUSE 42.2 by Joachim.Banzhaf@gmail.com

Unix/Linux, (openSUSE, Raspberry Pi/Cubieboard recommended) Windows 


%prep
%setup -q

%build
cat > appversion.default << EOL
#define APPVERSION %{APPVERSION}
#define APPHASH "%{APPHASH}"
#define APPDATE `date +%s`
EOL
#
mkdir build/
pushd build/
cmake .. \
    -DCMAKE_BUILD_TYPE=Release \
    -DUSE_STATIC_BOOST=OFF \
    -DUSE_STATIC_OPENZWAVE=OFF
make
popd

%install
pushd build/
%make_install
popd
install -m 0644 -D %{SOURCE1} %{buildroot}/%{_unitdir}/%{name}.service
#
# Cleanup
#
rm -f %{buildroot}/opt/domoticz/scripts/dzVents/runtime/tests/scandir/.f3.lua.swp
#
%fdupes -s %{buildroot}/opt
#
# Setup system
#
mkdir -p %{buildroot}/run/domoticz
mkdir -p %{buildroot}/var/log
touch %{buildroot}/var/log/domoticz.log

# install /usr/lib/tmpfiles.d/domoticz.conf
mkdir -p %{buildroot}%{_tmpfilesdir}
cat > %{buildroot}%{_tmpfilesdir}/domoticz.conf <<EOF
# domoticz needs existing /run/domoticz/ to create domoticz.pid there
# See tmpfiles.d(5) for details

d /run/domoticz 0755 domoticz domoticz -
EOF

%pre
getent group domoticz >/dev/null || groupadd -r domoticz
getent passwd domoticz >/dev/null || \
useradd -r -g domoticz -d %{_sharedstatedir}/domoticz -s /sbin/nologin \
        -c "domoticz daemon account" domoticz
%if 0%{?_unitdir:1}
    %service_add_pre domoticz.service
%endif

%post
%if 0%{?_unitdir:1}
    %service_add_post domoticz.service
%endif

%preun
%if 0%{?_unitdir:1}
        %service_del_preun domoticz.service
%endif

%postun
%if 0%{?_unitdir:1}
    %service_del_postun domoticz.service
%endif

%files
%defattr(-,root,root)
%dir %attr(0755,domoticz,domoticz) /opt/domoticz/
%dir %attr(0755,domoticz,domoticz) /run/domoticz/
%attr(-,domoticz,domoticz) /opt/domoticz/*
%{_tmpfilesdir}/domoticz.conf
%{_unitdir}/%{name}.service
%attr(0644,domoticz,domoticz) /var/log/domoticz.log

%changelog

Add to /usr/share/cmake/Modules/FindOpenSSL.cmake after failing find_library() calls 

set(OPENSSL_SSL_LIBRARY "/usr/lib64/libssl.so")
set(OPENSSL_CRYPTO_LIBRARY "/usr/lib64/libcrypto.so")

Commands to download, build, update and install 

v=4.9700
zypper in libopenzwave-devel libopenssl-devel libcrypto41
mkdir -p /home/joachim/rpmbuild/SPECS /home/joachim/rpmbuild/SOURCES
wget -O domoticz.zip https://github.com/domoticz/domoticz/archive/${v}.zip
unzip domoticz.zip
tar czf /home/joachim/rpmbuild/SOURCES/domoticz-$v.tar.gz domoticz-${v}/
rpmbuild -ba /home/joachim/rpmbuild/SPECS/domoticz.spec
sudo rpm -Uhv /home/joachim/rpmbuild/RPMS/x86_64/domoticz-${v}-0.x86_64.rpm
sudo systemctl start domoticz.service

Configuration

https://github.com/arendst/Sonoff-Tasmota/wiki/Domoticz

  • On setup/hardware page create mqtt connection (host job4, port 1883, option flat/out) and one Dummy device for virtual switches
  • For each tasmota device function (switch, temp/hum, ...) click on "virtual sensor" (on hardware page at dummy device entry)
  • On setup/devices page look at idx values for the virtual sensor devices and configure tasmota device with them.

Cura Build

Prerequisites

git clone https://github.com/Ultimaker/Cura.git
git clone https://github.com/Ultimaker/cura-build

Follow instructions for CentOS in cura-build/README.md and try to adapt for opensuse 42.2 

sudo zypper in gcc-fortran python3 python3-pyserial python3-numpy python3-opengl python3-setuptools libstdc++-devel openssl openblas-devel gtk3-devel webkit2gtk3-devel gstreamer-devel python-wxWidgets-3_0 python-wxWidgets-3_0-devel
# pip3 install F2PY

F2PY not found -> build may fail

Installation

cmake fails because it needs python 3.5 while opensuse 42.2 only has 3.4 - end of story for now :(

Use app container for now (but how to use core functions directly?)

Feinstaubsensor

https://luftdaten.info/feinstaubsensor-bauen/

  • NodeMCU
  • SDS011
  • optional: BME280 (probably needs code change since they use DHT22)
  • USB powersupply
  • USB cable
  • 2 x Marley HT DN75, 87°
  • Gaze als Insektenschutz
  • 3 x Kabelbinder lang (für Gaze an Marley, Fixierung an Pfosten o.ä.) und kurz (Kabel/NodeMCU/SDS011/BME280) fixieren
  • ~20cm Plastikröhrchen Innendurchmesser 6mm (dunkel)

Cost ~25€

RFID Demo

https://github.com/miguelbalboa/rfid/blob/master/examples/AccessControl/AccessControl.ino

What is needed for an access control demo (might send mqtt status):

  • ESP8266 as central unit
  • RFID reader/writer
  • 1 RFID Card (Master)
  • n RFID Tags (ID "Cards")
  • USB Cable MicroUSB
  • LED for access granted or added: green
  • LED for access denied or removed or error: red (red+green: master mode)
  • Dupont cabling for reader (~10 f-f)
  • Breadboard

Cost ~5€

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