Application Note Getting Started with the Sensirion Environmental Sensor Shield Required Hardware and Wiring The Environmental Sensor Shield ESS for short is a sensor board which enables users to easily develop demos and prototypes using Sens irio ns air quality, relative humidity and temperature sensors. It is designed following the Arduino footprint, which is a common form factor for reference designs and allows the board to be used with a wide variety of platforms. It also features a simple 4-pin extension port on the bottom to simplify connecting to platforms which do not follow the Arduino footprint. Additionally, this 4-pin header can be used to move the board further away from the main PCB, which can contain heat sources and thus influence the temperature measurements. Figure 1: Top and Bottom view of the Sensirion ESS The ESS includes three main components: 1. SHTC1 humidity and temperature sensor 2. SGP30 Indoor Air Quality (TVOC & CO eq) sensor 2 3. LED traffic lig ht to display air quality data SHTC1 and SGP30 are connected to pins 27 (SDA) and 28 (SCL), which are the standard Arduino I2C clock and data line. The LEDs are available on the Arduino footprint, and are connected to pins 9 (red), 10 (yellow) and 11 (green) respectively. On Arduino, these pins are typically PWM pins, which allows to dim the LEDs depending on the application. The pin header on the bottom has four signals, VCC, SDA, SCL, and GND. The LEDs cannot be accessed through the pin connector. Datasheets The datasheet for the SHTC1 can be found here: www.sensirion.com/shtc1 The datasheet for the SGP30 can be found here: www.sensirion.com/sgp www.sensirion.com Version 0.1 October 2017 D1 1/3 Application Note for Sensirion Environmental Sensor Shield Software Arduino The official library for Arduino can be found on our github page: