The core of this module is the ESP32 chip, which is scalable and self-adaptive. The clock frequency can be adjusted from 80MHz to 240MHz, and it supports RTOS. It is a general-purpose Wi-Fi+BT+BLE MCU module The Nodemcu-32s module integrates traditional Bluetooth, Bluetooth Low Energy and Wi-Fi. It has a wide range of uses: Wi-Fi supports a wide range of communication connections and also supports direct connection to the Internet through routers; while Bluetooth allows users to connect to mobile phones or broadcast BLE Beacon for signal detection. The data transmission rate supported by the module is as high as 150Mbps, and the antenna output power reaches 20dBm, which can realize wide-range wireless communication 802.11b/g (802.11n, to 150Mbps) WIFI frequency range 2400~2483.5MHz Clock frequency adjustment range 80MHz to 240MHz Support RTOS Built-in 2-channel 12 bit high-precision ADC, up to 18 channels Support UART/GPIO/ADC//SDIO/PWM/I2C/I2S interface Support multiple sleep modes, the sleep current of ESP32 chip is less than 5A Embedded Lwip protocol stack Support STA/AP/STA+AP working mode Support serial port local upgrade and remote firmware upgrade (FOTA) General AT commands can be used quickly Support secondary development, integrated , Linux development environment Type: Development Board Colour:black Material:PCB Package Contents: 3 x Development Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.