otmonitor

Monitor tool for the OTGW (http://otgw.tclcode.com/)

Build instructions: http://otgw.tclcode.com/otmonsrc.html

Deployment scenario

• OTGW (see Hardware)
• Connected through TTL-USB
• OTMonitor running on Raspberry PI Zero W (Headless)
• OTMonitor publishes to MQTT (that I consume with OpenHAB MQTT Binding)

Environment settings

• running Raspian headless
• sudo apt-get update
• sudo apt-get install -y git
• sudo git clone https://github.com/basmeerman/otmonitor.git /opt/otmonitor
  • make sure to chmod 755 otmonitor and build.sh
  • make sure to have ./kit/runtime symbolic link to ./kit/tclkit
• build otmonitor by executing sudo ./build.sh
• manually create otmonitor configfile /opt/otmonitor/otmonitor.conf
• make sure to install otmonitor as a system service
  • sudo cp ./initd/otmonitor /etc/init.d/
  • sudo chmod 755 /etc/init.d/otmonitor
  • sudo update-rc.d otmonitor defaults
  • sudo reboot
  • verify working systemctl status otmonitor
• extra create MOTD
  • sudo nano /etc/motd remove all lines and add "Device: Opentherm Gateway" save and exit
  • sudo nano sudo nano /etc/update-motd.d/80-overlay

    #!/bin/sh
    str=$(mount | grep ' on / ')
    if echo $str | grep -q 'overlay'; then
       printf "\n------ INFO: / MOUNTED WITH OVERLAY ------\n\n"
    elif echo $str | grep -q 'rw'; then
       printf "\n++++++ INFO: / MOUNTED READ-WRITE ++++++\n\n"
    else
       printf "\n!!!!!! WARNING: / UNKNOWN STATE !!!!!!\n\n"
    fi
    

  • sudo chmod 755 /etc/update-motd.d/80-overlay
• extra backup
  • sudo mkdir /backup
  • sudo nano /root/.smbcredentials and add credentials for SMB share access
  • sudo /etc/fstab and add mountpoint to SMB share

    //192.168.100.99/NeuralHomeBackups/BackupRPIOpenThermGateway /backup cifs credentials=/root/.smbcredentials 0 0 comment=systemd.automount
    

  • sudo mount -a
  • curl -sSLO https://www.linux-tips-and-tricks.de/raspiBackupInstallUI.sh && sudo bash ./raspiBackupInstallUI.sh
  • configure backup in menu
• extra readonly filesystem
  • sudo raspi-config
  • under Advanced enable Overlay FS
  • save / close / reboot
• test http://:8080

Hardware

• OTGW (http://otgw.tclcode.com/otmonsrc.html)
• 20V 3A Powersupply for OTGW (https://www.nodo-shop.nl/nl/voedingen/201-universele-voeding-9-24v.html)
• TTL-USB (https://www.electrodragon.com/product/usb-ttl-serial-ch340-board/)
• Raspberry Pi Zero W (https://www.raspberrypi.org/pi-zero-w/)
• 5V 1A Powersupply for Raspberry Pi (generic)
• 3Pcs DuPont Jumper Cable connecting GND, RTX, TRX between TTL-USB and OTGW FTDI interface