Tuesday, October 31, 2017

Hikvision IP camera experiences

I decided to try out a low cost surveillance camera, Hikvision DS-2CD2142FWD-IS.

The good

  • Cheap - you can get 10 of these for the price of a single European brand name camera
  • Surprisingly solid casing
  • Comes with waterproof RJ45 connection kit

The bad

  • Supposed to be web managed - however that is not really the case
    • Management "Web pages" rely on a proprietary browser plugin for essential parts of the configuration
    • Cannot see a live view - must manually open a dedicated app to see video
    • Cannot play back on-device recordings
    • Cannot download images captured on the device micro sd
    • Cannot draw area of interest for motion detection, video tampering, intrusion detection or line crossing detection
  • Something weird with the DHCP implementation, occasionally picks up a new IP address. No other device or camera in the same network does this

The unknown

  • Robustness and real operating temperature range - winter will tell whether this one will work in the sub -30C temperatures

Saturday, October 28, 2017

Canon CP910 no longer prints over WIFI

When printing from and Android phone, CP910 fails with error message:
Cannot read data from memory card!
Cannot print incompatible images or memory card not readable
Even though there is no memory card involved at all. Canon PRINT app incorrecly claims the photo was printed succesfully.

I suspect this has to do with Canon CP910 not really understanding progressive JPEG images. Android probably switched from baseline to progressive at some point.

To resolve this, I had to install an image converter app. Then first convert the image from jpg to jpg and then share the converted image to Canon PRINT app for printing.