Skip to content

Raspberry Pi: take a screenshot from a display with no keyboard and mouse

The Raspberry Pi in the kitchen runs relatively stable, but recently the browser (which is showing the openHAB HABpanel) popped up a warning in the upper right corner. That's annoying, because this area in HABpanel shows the outside temperature.

Before investigating what's going on, I had to figure out a way to get a screenshot of the display - without running into the kitchen with my mobile phone. And without attaching a keyboard all the time (to press the "Print" button).

 

Continue reading "Raspberry Pi: take a screenshot from a display with no keyboard and mouse"
  • Twitter
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Raspberry Pi: take a screenshot from a display with no keyboard and mouse
  • Bloglines Raspberry Pi: take a screenshot from a display with no keyboard and mouse
  • Technorati Raspberry Pi: take a screenshot from a display with no keyboard and mouse
  • Fark this: Raspberry Pi: take a screenshot from a display with no keyboard and mouse
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at YahooMyWeb
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at Furl.net
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at reddit.com
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at blinklist.com
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at Spurl.net
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at Simpy.com
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse at blogmarks
  • Bookmark Raspberry Pi: take a screenshot from a display with no keyboard and mouse with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca

Hide the mouse cursor on a Raspberry Pi

The openHAB HABpanel we have in the kitchen runs on a Raspberry Pi and uses a touchscreen display. The browser starts in fullscreen mode, and shows a specific HABpanel screen for this display. That's all nice, but by default the mouse cursor is in the way. Let's get rid of it.

 

Continue reading "Hide the mouse cursor on a Raspberry Pi"
  • Twitter
  • Bookmark Hide the mouse cursor on a Raspberry Pi at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Hide the mouse cursor on a Raspberry Pi
  • Bloglines Hide the mouse cursor on a Raspberry Pi
  • Technorati Hide the mouse cursor on a Raspberry Pi
  • Fark this: Hide the mouse cursor on a Raspberry Pi
  • Bookmark Hide the mouse cursor on a Raspberry Pi at YahooMyWeb
  • Bookmark Hide the mouse cursor on a Raspberry Pi at Furl.net
  • Bookmark Hide the mouse cursor on a Raspberry Pi at reddit.com
  • Bookmark Hide the mouse cursor on a Raspberry Pi at blinklist.com
  • Bookmark Hide the mouse cursor on a Raspberry Pi at Spurl.net
  • Bookmark Hide the mouse cursor on a Raspberry Pi at Simpy.com
  • Bookmark Hide the mouse cursor on a Raspberry Pi at blogmarks
  • Bookmark Hide the mouse cursor on a Raspberry Pi with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca

Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)

In one of my earlier blog posts I reported that occasionally the HABpanel will disconnect from the server. Turns out it's not HABpanel, but it's the Pi itself which is causing the trouble. Part of the problem why it took me so long to investigate is that the display is in the kitchen, and someone had to have a look and spot the small red error message. To work around that problem, I hooked the device up in the network monitoring, and had an alarm triggered when the device is not reachable. Sure enough, that happens occasionally.

Because I moved /var/log to a small RAM disk to avoid wearing out the SDcard, all logs are lost once the device is rebooted. Had to bring keyboard and mouse to the kitchen in order to save the logfiles once the device was no longer reachable over the network.

 

Continue reading "Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)"
  • Twitter
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)
  • Bloglines Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)
  • Technorati Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)
  • Fark this: Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110)
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at YahooMyWeb
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at Furl.net
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at reddit.com
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at blinklist.com
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at Spurl.net
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at Simpy.com
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) at blogmarks
  • Bookmark Reboot the Raspberry Pi on network failures (brcmfmac: brcmf_cfg80211_scan: scan error -110) with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca

Dim the Raspberry Pi screen

The new Raspberry display works nice, but the screen is too bright. At night in the kitchen it enlightens the entire room - unnecessarily. Since I'm using the original Raspberry Pi 7" touch display, the brightness can be controlled in /sys/class/backlight/rpi_backlight/brightness. This "file" can hold a value from 0 (display off) to 255 (full bright).

 

Continue reading "Dim the Raspberry Pi screen"
  • Twitter
  • Bookmark Dim the Raspberry Pi screen at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Dim the Raspberry Pi screen
  • Bloglines Dim the Raspberry Pi screen
  • Technorati Dim the Raspberry Pi screen
  • Fark this: Dim the Raspberry Pi screen
  • Bookmark Dim the Raspberry Pi screen at YahooMyWeb
  • Bookmark Dim the Raspberry Pi screen at Furl.net
  • Bookmark Dim the Raspberry Pi screen at reddit.com
  • Bookmark Dim the Raspberry Pi screen at blinklist.com
  • Bookmark Dim the Raspberry Pi screen at Spurl.net
  • Bookmark Dim the Raspberry Pi screen at Simpy.com
  • Bookmark Dim the Raspberry Pi screen at blogmarks
  • Bookmark Dim the Raspberry Pi screen with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca

Occasional HABpanel disconnect from the openHAB server

The new display showing HABpanel works quite nice. But occasionally the fullscreen browser will lose the network connection. As far as I can see, it's not a Wi-Fi problem of the Raspberry Pi, but still annoying: in the morning the browser shows a small red warning that the connection to the openHAB server is lost, time is still correct, but temperature and the status of other devices is outdated. To fix that, I have to leave fullscreen mode, hit reload - and then there is no keyboard for going into fullscreen mode again (that's using the F11 key).

 

Continue reading "Occasional HABpanel disconnect from the openHAB server"
  • Twitter
  • Bookmark Occasional HABpanel disconnect from the openHAB server at del.icio.us
  • Facebook
  • Google Bookmarks
  • FriendFeed
  • Digg Occasional HABpanel disconnect from the openHAB server
  • Bloglines Occasional HABpanel disconnect from the openHAB server
  • Technorati Occasional HABpanel disconnect from the openHAB server
  • Fark this: Occasional HABpanel disconnect from the openHAB server
  • Bookmark Occasional HABpanel disconnect from the openHAB server at YahooMyWeb
  • Bookmark Occasional HABpanel disconnect from the openHAB server at Furl.net
  • Bookmark Occasional HABpanel disconnect from the openHAB server at reddit.com
  • Bookmark Occasional HABpanel disconnect from the openHAB server at blinklist.com
  • Bookmark Occasional HABpanel disconnect from the openHAB server at Spurl.net
  • Bookmark Occasional HABpanel disconnect from the openHAB server at Simpy.com
  • Bookmark Occasional HABpanel disconnect from the openHAB server at blogmarks
  • Bookmark Occasional HABpanel disconnect from the openHAB server with wists
  • wong it!
  • Bookmark using any bookmark manager!
  • Stumble It!
  • Identi.ca