MakerFocus 4pcs ESP8266 Esp-01 Serial Wireless Wifi Transceiver Module Compatible with Arduino

Features: -Model:Esp-01.Compatible with Arduino -Support 3 modes: AP, STA, AP + STA -Link to view the technical details, https://nurdspace.nl/ESP8266 -Introduction: https://github.com/sleemanj/ESP8266_Simple -Youtube tutorial: https://www.youtube.com/watch?v=qU76yWHeQuw   Specifications: Serial/UART baud rate: 115200 bps Serial/UART baud rate: 115200 bps Input power: 3.3V I/O voltage tolerance: 3.6V Max Flash Memory Size: 1MB (8Mbit) WiFi security modes: WPA, WPA2   Packing List: 4 * ESP8266 Wifi Transceiver Module