Ancai ESP8266 ESP01S Serial WiFi Wireless Transceiver Module Pack of 4

ESP-01S wireless module 1, operating voltage: DC3.0-3.6V (recommended 3.3V) 2, SPI Flash: 1MB 3, on-board PCB antenna gain: 3DBi 4, ESP-01S is an improved version of ESP-01, optimizing circuit and wiring, improve WIFI wireless performance. The module is more stable and provides you with a stronger antenna signal. 5, the module in the internal operation of The LWIP protocol, support ingesta, STA, AP and STA co-existence mode. 6, the improved AT command is simple and efficient, so that your operation and development is easier. It can also brush other firmware, such as: nodemcu.You can use the Arduino IDE to develop firmware. 7. communication distance: 100mm 8, antenna: PCB on-board antenna 9, transmission power: 20dbm 10, work diagram: -40-125 degrees 11, operating current: 80MA Package: 4 pcs ESP-01S wireless modules.