This is an IoT board that can be used as a client mode where collected sensor data can be sent to the server using WiFi protocol. Or, used as the main server to control Led, relay or any output that is connected to this board. This board is fully supported by the Arduino IDE program. Specification of 38 Pin Nodemcu ESP32S Microcontroller WiFi & Bluetooth ESP WROOM 32 Development Board Module: Type: Wifi Bluetooth module Model: ESP32 38 pins Power voltage (USB): 5V DC Input/Output voltage: 3.3V DC Power consumption: 5μA in suspension mode Main CPU: Tensilica Xtensa 32-bit LX6 Performance: Up to 600 DMIPS Clock frequency: up to 240Mhz Secondary processor: allows for basic operations in ultra low-consumption mode Wifi: 802.11 b/g/n/e/i (802.11n @ 2.4 GHz up to 150 Mbit/s) Bluetooth: 4.2 BR/EDR BLE dual control mode Memory: 448 KByte ROM, 520 KByte SRAM, 6 KByte SRAM on RTC and QSPI supports multiple flash / SRAM chips Chip USB-Serial: CP2102 Antenna: PCB GPIO digital pins: 24 (some pins only as input) Digital analog converter: two 12bit SAR type ADC, supports measurements on up to 18 channels, some pins support an amplifier with programmable gain Security: IEEE 802.11, including WFA, WPA/WPA2 and WAPI Hardware-accelerated cryptography: AES, SHA-2, RSA, elliptical curve cryptography (ECC), random number generator (RNG) USB To Serial Converter Chip CH9102 Package Include: 1 x 38 Pin Nodemcu ESP32S Microcontroller WiFi & Bluetooth ESP WROOM 32 Development Board Module In Pakistan