Advanced IP scanner unable to detect Raspberry Pi

Question

I am trying to set up my Raspberry Pi in headless mode (i.e., without a monitor). I have installed the Raspbian Wheezy OS on my SD card. Initially when I powered it on with the ethernet cable connected to my laptop and ran the Advanced IP Scanner, it successfully detected the Pi and I was able to access the Pi's terminal with PuTTY using the Pi's IP. I logged into the device.

When I tried to access the Pi later, doing everything in the same manner as I described above, the Advanced IP Scanner was not able to detect the Pi.

The Pi is powered on and connected to the laptop via the ethernet cable. What am I doing wrong?

Answer 1

I presume since you don't know the IP address, it means that the Pi is getting its' IP from DHCP. If a simple scanner can't find the IP, it's because the Pi hasn't acquired one - perhaps you have misconfigured whatever DHCP/Network Sharing you might be using on the laptop?

What exactly are you using to give the Pi an IP, and how did you configure it? If you turned on the Pi before you enabled the service handling DHCP, it's possible the Pi has timed out attempting to acquire an address and simply powering it off and on would solve the problem. Alternatively you should assign the Pi a static IP address if you are always using it in the same configuration.

Answer 2

1) Copy the img to your SD card

2) Open the SD card on your computer

3) Open the file cmdline.txt and add e.g ip=169.254.0.10 just behind the last entry like this:

dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait ip=169.254.0.10

It is important that you use a text editor which preserves line endings e.g. notepad++, sublime... DON'T use something like word for this.

Make sure beforehand that the IP is free. E.g. with your scanner or by using the ping command.

4) Eject the SD and plug it into your pi

5) ssh [email protected] (if you are on a unix system, on windows use putty)

6)Run this command printf 'network={%s\n\tssid="SSID"%s\n\tpsk="PASSWORD"%s\n}' >> /etc/wpa_supplicant/wpa_supplicant.conf Your have to change SSID & PASSWORD

Answer 3

You laptop does'nt have a DHCP server installed. You should connect your Pi into your router instead.

Answer 4

Connect the pi to your laptop, turn off wifi and make sure network bridge is enabled in its properties, then use IP scanner and you should only see 2 IP addresses : your laptop's and your pi's. Hope i helped.