Raspberry Pi Asked by ericmjl on December 7, 2021
I’m doing a headless setup, where we use the Pis in field work (tracking movement of seals via camera in the Cape Cod area), and so we can only monitor it headless, without a separate display (to save on power).
In order to have the Pis get time, I need them to connect to my colleague’s iPhones (which are operating as hotspots), and use ntpd to get time from the internet.
However, I haven’t yet figured out what the command is to query the WiFi network name, to confirm that it is connected to the right network – is there one?
You can use this code to check the IP assigned to the RPi:
t="$(ifconfig wlan0 | awk '/inet addr/{print substr($2,6)}')"
echo $t
w=${#t}
echo $w
Answered by Nikhil Parashar on December 7, 2021
iwgetid
will give you the SSID
Answered by Steve Robillard on December 7, 2021
Try iwconfig:
user@host:~ $ iwconfig
wlan0 unassociated Nickname:"<WIFI@REALTEK>"
Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Answered by adengle on December 7, 2021
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