Smart Home Backup

1. Backup Z-Wave Stick
Use ZStick_G5

2. Backup Rpi
Use Win32DiskImager

Rsync to Synoilogy NAS

Generate public key on Rpi
 ssh-keygen

Log in to Synology Telnet as root (sudo -i , password)

Copy public key
tail ~/.ssh/id_rsa.pub

Use instruction below
http://www.thegeekstuff.com/2008/06/perform-ssh-and-scp-without-entering-password-on-openssh/

verify if password is asked:
ssh '192.168.1.23'

rsync script:
#!/bin/bash
# Script to save and copy mosq to server
cp /var/log/mosquitto/mosq.log "/var/log/mosquitto/mosq_backup$(date +%Y%m%d_%H%M%S).log"
> /var/log/mosquitto/mosq.log
sudo rsync -av -e ssh /var/log/mosquitto/ 192.168.1.23::Backup/raspberry/
rm /var/log/mosquitto/mosq_backup*

Fstab
tmpfs    /var/log    tmpfs    defaults,noatime,nosuid,mode=0777,size=100m    0 0
tmpfs    /var/log/openhab    tmpfs    defaults,noatime,nosuid,mode=0777,size=150m    0 0
tmpfs    /tmp    tmpfs    defaults,noatime,nosuid,size=20m    0 0
tmpfs    /var/tmp    tmpfs    defaults,noatime,nosuid,size=20m    0 0
 

Emergency launch of HA on Laptop

This article describes emergency start of HA on laptop in cas if main server is unavailable

First periodic SVN commitsh should be done:
folders:
/home/pi/.node-red
/etc/openhab/configurations

Execute svn commit command

1. Laptop should have Node-RED, Mosquitto, Openhab and all it's bindings installed and running
2. Checkout OpenHAB Configuration and Node-RED flows from SVN
3. Change COM port for Z-Wave stick to COM3
4. Run Node.js and start Node-RED
5. Insert Z-wave USB Stick(upper right port for COM3). Lower Right port will be COM4.
6. Run start.bat in OpenHAB folder

Moqsquitto MQTT Broker Setup and usage

Install Mosquitto

sudo apt-get install mosquitto mosquitto-clients python-mosquitto

Configuration File location

/etc/mosquitto

mosquitto.conf File contents

pid_file /var/run/mosquitto.pid

persistence true
persistence_location /var/lib/mosquitto/
connection_messages true
log_type all
log_dest file /var/log/mosquitto/mosquitto.log
log_dest syslog

include_dir /etc/mosquitto/conf.d

Create /var/log/mosquitto/mosquitto_log.sh

#!/bin/bash
# My first script
sleep 120
sudo ntpdate -s ntp.obspm.fr
mkdir -p /var/log/mosquitto
mosquitto_sub -v -t /# | xargs -d$'\n' -L1 sh -c 'date "+%D %T.%3N $0"' >> /var/log/mosquitto/mosq.log &
sudo systemctl restart homebridge

Change permissions chmod 777 mosquitto_log.sh

Add to start script

Add to /etc/rc.local

#Start MQTT Logging

/var/log/mosquitto/msquitto_log.sh &

Smart Home on Raspberry PI 2

1. Install Debian using Noobs
The default login for Raspbian is username pi with the password raspberry.
2. Install VNC Server from https://www.raspberrypi.org/documentation/remote-access/vnc/
3. Install Openhab using instruction from https://github.com/openhab/openhab/wiki/Linux---OS-X

Install following Bindings:

sudo apt-get install openhab-addon-persistence-rrd4j

sudo apt-get install openhab-addon-persistence-logging

sudo apt-get install openhab-addon-persistence-exec 

sudo apt-get install openhab-addon-binding-z-wave 

sudo apt-get install openhab-addon-binding-mqtt 

sudo apt-get install openhab-addon-binding-http 
sudo apt-get install openhab-addon-binding-ntp

sudo apt-get install openhab-addon-binding-weather

Change time zone to Berlin 

sudo dpkg-reconfigure tzdata 

To autostart on reboot use Init based on systemd

sudo systemctl daemon-reload
sudo systemctl enable openhab 

File locations

• service configuration /etc/default/openhab
• site configuration /etc/openhab
• log files /var/log/openhab
• userdata like rrd4j databases /var/lib/openhab
• openHAB engine, addons and /webapps folder /usr/share/openhab
• Node RED USer Dierctory /home/pi/.node-red

4. Install HABMIN (use updated path to OH above)

cd /usr/share/openhab 

sudo wget https://github.com/cdjackson/HABmin/releases/download/0.1.3-snapshot/habmin.zip
sudo unzip habmin.zip
sudo rm habmin.zip
sudo rm addons/org.openhab.binding.zwave-1.5.0-SNAPSHOT.jar

HABMIN Path: 

http://raspberry_IP:8080/habmin/ 

5. Configure SMB to access configuration and log files

http://raspberrypihq.com/how-to-share-a-folder-with-a-windows-computer-from-a-raspberry-pi/

sudo nano /etc/samba/smb.conf - append at the end

[OpenHAB]
 comment=OpenHAB Folder share
 path= /usr/share/openhab
 browseable=Yes
 writeable=Yes
 only guest=no
 create mask=0777
 directory mask=0777
 public=no

[Openhab_Configuration]
 comment=OpenHAB Config
 path= /etc/openhab
 browseable=Yes
 writeable=Yes
 only guest=no
 create mask=0777
 directory mask=0777
 public=no

[Openhab_Logs]
 comment=OpenHAB Logs
 path= /var/log/openhab
 browseable=Yes
 writeable=Yes
 only guest=no
 create mask=0777
 directory mask=0777
 public=no

[Mosquitto_Logs]
 comment=Mosquitto Logs
 path= /var/log/mosquitto
 browseable=Yes
 writeable=Yes
 only guest=no
 create mask=0777
 directory mask=0777
 public=no 

6. Z-wave binding

sudo usermod -a -G dialout openhab

Usb Stick port - dev/ttyACM0 

8. Install my.openhab

https://klenzel.de/3687 

9. Set Date and Time

apt-get purge ntp
apt-get install openntpd

Next I append -s at the DAEMON_OPTS at /etc/default/openntpd

DAEMON_OPTS="-f /etc/openntpd/ntpd.conf -s"

systemctl enable openntpd.service 

systemctl start openntpd.service 

If starting the ‘openntpd’ service does not help, then try this.
ntpd -s -d 
ntpdate -s ntp.obspm.fr

Commands:

sudo /etc/init.d/openhab start 

sudo /etc/init.d/openhab stop 

sudo /etc/init.d/openhab status

systemctl status homebridge -l

systemctl start homebridge 

tail -f /var/log/openhab/openhab.log

tail -f /var/log/openhab/events.log

mosquitto_pub -t /myhome/command/Temperature_Setpoint/state -m 18

mosquitto_sub -v -t /#

mosquitto_sub -v -t /# | xargs -d$'\n' -L1 sh -c 'date "+%D %T.%3N $0"' 

Finally, stock Android does have a hidden setting to keep the screen on indefinitely, but only while charging. You need to activate Developer 
Mode first (tap the Build number entry in the About phone menu in Settings seven times) and then choose Developer options from the Settings menu. Choose Stay awake and as long as your phone or tablet is plugged in, the screen won't go to sleep after a certain period of time.

Remove SWAP

https://tino.cc/2016/05/07/raspbian-ueber-nfs-netzwerk-share-booten/

sudo dphys-swapfile swapoff

sudo systemctl disable dphys-swapfile

sudo update-rc.d dphys-swapfile remove

sudo apt-get purge dphys-swapfile

sudo rm /var/swap 

Dynamic indication on dot-matrix LED displays with STM32F103

I have to make a 3-digit alfa-numerical indication. I have choosen to use 5*7 dots LED Matrix Displays. Since I need a big display - have chosen a 2.0" LED display from Kingbright
The schematic will work offcourse with any other LED display size.
To save controller pins, the solution was realized on shift registers 74HC594 and SPI peripheral.
Here is the schematic:

The controller needs only 3 pins to send data to display: MOSI, CLK_BUF, PL/RCLK_BUF. All three signals come from SPI peripheral of STM32F103. But they should be buffered to convert 3.3V levels to 5V. 74HC14 can do this job very well.
Signal OUT_CLR can be used to blank display at any time. IT can be connected to reset circuit or watchdog.
The circuit works as follows:
The first 74HC594 is used to drive 2981 Darlington transistor array. The array is needed to amplify row signal, as it can drive up to 15 parrallely connected LEDs in worst case. The array outputs are connected to Anode rows of TC20-11 LED Displays. During the indication cycle, the SPI should write there a running one. E.g. only one A2981 output should be at logic 1 at the same time.
The logic 1 activates appropriate row. To lit the dot in this row, the logic 0 should be written in appropriate column via second and third 74HC594 shift register.
In this case the duty cycle of 1/7th is achieved. The current limiting resistors define the current around 9ma per segment. This is not so much, but it should be so low, as 74HC594 has a limit of 70ma per IC.
When using TC20-11HWA type display the picture is not so contrast - but bright enough to read the image in artificial light. Using SRWA or SURKWA ultra bright displays allows also reading in sun light.
The number of digits can be easily extended as shown above. THe update rate should be higher than 100hz to avoid flickering.
This schematic is fully operational. The photos will follow. I can post also SPI function software.