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GitHub - schollz/howmanypeoplearearound: Count the number of people around you by monitoring wifi signals
How does it work?

howmanypeoplearearound counts up the number of probe requests coming from cellphones in a given amount of time. The probe requests can be "sniffed" from a monitor-mode enabled WiFi adapter using tshark. An acccurate count does depend on everyone having cellphone and also scanning long enough (1 - 10 minutes) to capture the packet when a phone pings the WiFi network (which happens every 1 to 10 minutes unless the phone is off or WiFi is disabled).

This is a simplification of another program I wrote, find-lf which uses a similar idea with a cluster of Raspberry Pis to geolocate positions of cellphones within the vicinity.
wifi  python  wireless  monitoring 
1 hour ago by euler
China threatens reprisals if Canada bans Huawei from 5G contracts | RCR Wireless
- no choice about it, Canada needs to ban Huawei now that the Chinese have drawn that line in the sand
china  wireless  huawei  canada 
19 hours ago by renaissancechambara
Long-Range RFID With Feedback | Hackaday
If you’re catching up, passive RFID technology is behind the key fobs and stickers which don’t need power, just proximity to the reader’s antenna. This is a much “hackier” version that works with discrete signals instead of analog ones. It will not however require writing a new library and programming new tags from the ground up just for the user to get started, so there is that trade-off. Sparkfun offers a UHF reader which can simultaneously monitor 25 of the UHF tags shown in this paper.

To construct one of these enhanced tags, the antenna trace is broken and then routed through a switching device such as a glass-break sensor, temperature limit switch, doorbell, or light sensor. Whenever continuity is restored the tag will happily send back its pre-programmed data, and the reader will acknowledge that somewhere one of the tags is seeing some activity.
hackaday  mobile  wireless  sensor  iot  internetofthings  rfid 
23 hours ago by cyberchucktx
WiGLE: Wireless Network Mapping
Maps and database of 802.11 wireless networks, with statistics, submitted by wardrivers, netstumblers, and net huggers.
wifi  wireless  mapping  network  location  gps 
yesterday by bitboxer
ESP8266 Community WIKI
Wiki / community for ESP8266, a dirt cheap (< $10) WiFi Arduino board.
esp8266  wiki  arduino  wireless  wifi 
yesterday by cyberchucktx
howmanypeoplearearound: Count the number of people around you by monitoring wifi signals
howmanypeoplearearound calculates the number of people in the vicinity using the approximate number of smartphones as a proxy (since ~70% of people have smartphones nowadays). A cellphone is determined to be in proximity to the computer based on sniffing WiFi probe requests. Possible uses of howmanypeoplearearound include: monitoring foot traffic in your house with Raspberry Pis, seeing if your roommates are home, etc.
wifi  wireless  mobile  networking  opensource  tools 
yesterday by Chirael

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