WiFi Scanner Keychain
I recently came across with moononournation’s libraries and code on Arduino IDE for ESP8266 and ESP32, which includes a demo of WiFi 2.4G air scanner.
As iOS user I can not have a WiFi Explorer so having this keychain hanging in my backpack was a nice idea. However moononournation did a tutorial and printer STL files for a TTGO VT7 v1.0 that is no longer available, so I designed my own enclosure for a TTGO T7 v1.4.