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The voice module uses WTV020SD-20SS as the core chip
so users can implement high-speed network communication
having ESP-12 module
3V – 5V DC (onboard regulator) Interface I2C & SPI I2C Address 0x76 or 0x77 (selectable) Pressure Range 300 – 1100 hPa Pressure Accuracy ±1 hPa (absolute)
EasyDriver Stepper Motor Driver servi The voice module uses WTV020SD-20SSThe EasyDriver Stepper Motor Driver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3. 3V pulse if you solder SJ2 closed on the EasyDriver). The EasyDriver requires a 6V to 30V supply to power the motor and can power any voltage of stepper motor. The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3. 3V. Connect a 4 wire stepper motor and
