Recently, a lot of products combined with IoT are released and also diversely applied to commercial purpose and real life such as smart-home and wearable device. Like this, IoT could be applied to various areas because of the important role of sensor....
Recently, a lot of products combined with IoT are released and also diversely applied to commercial purpose and real life such as smart-home and wearable device. Like this, IoT could be applied to various areas because of the important role of sensor. The existing sensor communication method is to quickly transmit data by using clock and two data pins based on the I2C serial communication method. As the objects used are gradually light-weighted and the amount of data transmission is decreased, the simplification of hardware is more emphasized as an essential design element than the speed of transmission. This paper designed a circuit to send/receive data in series, and also realized arduino, by analyzing the existing communication method of temperature/humidity sensor, and then using a single pin for light-weight. The single pin serial communication could reduce power consumption, which is suitable for the sensor area using digital communication of IoT area.