The Wemos D1 has Arduino format card. Wemos main circuit is ESP8266
Features of ESP8266: - WIFI 2.4 GHz 802.11 b/g/n - low power 32-bit MCU RISC architecture 80MHz - 4 Mbits of flash - 10-bit ADC is available - SDIO 2.0, (H) SPI, UART, I2C, I2S, IR Remote Control, PWM, GPIO
To install library for Arduino IDE version 1.8.2 or superior - Start Arduino and open Preferences window. - Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into Additional Board Manager URLs field. - Open Boards Manager from Tools > Board menu and install esp8266 platform (and don't forget to select your ESP8266 board from Tools > Board menu after installation).
I show a sample of Wifi Scanner. you can use it as Webserver too, really good product, with a big potential for DIY.
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