WiFi Signal strength indicator using ESP8266

https://www.electronics-lab.com/signal-strength-indicator-for-the-esp8266/

A simple signal strength indicator for the ESP8266 and 128 x 32 OLED Display This is a simple Arduino IDE sketch that displays the RSSI, BSSID and signal “bars” of a given SSID WiFi Signal strength indicator using ESP8266 – [Link]