awk ....
iwlist wlan0 scanning | awk -F '[:"]+' '/ESSID/{printf $2","}' | sed 's/,$/\n/'
iwlist wlan0 scanning | awk -F '[:"]+' '{printf $2","}' | sed 's/,$/\n/'
awk --posix -F ":" '{print $2}' test.txt |sed 's/"//g'|sed 's/\n/,/g'
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