Wi-Fi is more powerful than Bluetooth. Wi-Fi is usually used to connect to the wireless internet, which has made this protocol much more popular. You can easily connect to the Internet anywhere, using this technology. The Wi-Fi standard supports a maximum speed of 11Mps at 2.4 GHz. To increase the speed of this standard, another version called IEEE802.11n was built which speed has increased up to 200Mps. This increase in speed is due to the use of the multi-channel antenna (MIMO), the use of two 2.4 GHz and 5 GHz frequency ranges, and Medium Access Control (MAC). The Wi-Fi board is about 20 meters.

In this project, we want to create a WiFi heat map using the ESP8266, Arduino and 3.5″ TFT LCD. ESP8266 can detect the Wi-Fi signal of a specified SSID (RSSI). We used the ESP-01 module for this project. Put 4 of these modules in four corners of the room with a rectangular pattern. After receiving information from the ESP modules, we send them to Arduino to be analyzed and displayed.