A Grove sensor designed for indoor air quality testing. 

DFRobot Gravity Analog TDS Total Dissolved Solids Sensor Meter 3.3~5.5V Compatible for Water Quality Testing

Arduino Nano 33 IoT with headers

SIM808 GSM/GPRS/GPS Bluetooth Compatible Development Board With GPS Antenna COM45 ,R17

MOD-TCA9548A CJMCU-9548 TCA9548A 1-to-8 I2C 8-Channel IIC Multiplexer

ARDUINO YUN REV 2 ABX00020 ATmega32U4 Development Board

ARDUINO UNO WiFi REV2

Arduino DUE 2013 (ARM 32 BIT- Cortex M3)

mini micro sd card reader module

GY- SGP30 AIR QUALITY GAS SENSOR TVOC ECO2 CARBON DIOXIDE MEASUREMENT FORMALDEHYDE MODULE

arduino leonardo r3 atmega32u4

Ublox GPS NEO-8M GPS module GY- NEO8MV2 (with Battery)