BytePoster Master Kit (BMK) is an IoT platform allowing engineers to prototype, proof of concept and develop IoT products at an extremely fast pace. The BMK contains three boards: Core, Sensor, and GSM. Additionally, BMK can except additional custom boards for specific feature or capability.The Core board contains an Xtensa® Dual-core 32-bit LX6 microprocessors (WiFi/BLE), standalone timer, battery management and battery charging. Additionally, the capability to store information on SD card. The sensor board contains multiple sensors (Temperature and Humidity, High Precision Temperature, 3D Digital Linear Acceleration Sensor, 3D Digital Magnetic Sensor, 3D Accelerometer and 3D Gyroscope, Hi-Sensitivity Ambient Light Sensor, PIEZO ZeroPower Microphone), and the ability to accept any sensor via I2C, ADC, and SPI protocols.The dedicated GSM board for low power LTE connectivity, specially optimized for M2M and IoT applications.