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The sensor is very easy to use. Just insert it in the soil and read the date from the sensor using ADC. It consists of 2 probes that allow the current to pass through the soil and obtain resistance values to measure soil moisture current. It can decide whether the plants in your garden need watering or not by detecting the moisture of soil or to judge if there is water around the sensor.

Grove Mouser Encoder is a mechanical incremental rotary encoder (A, B channel) with a feedback of direction and speed. It features a standard Grove interface that will save your lots of work in wiring and programming. Also, it is well adapted to heavy-duty and a harsh environment. This product can be applied in toys, robots, and consumer input devices.

Grove MP3 v2.0 is a tiny-sized and compact audio module. It supports various audio file operations for an audio file of MP3, WAV and WMV format, such as random music playing, play music in specific files, and so on. With serial communication, you can use all predefined command or command combinations to do all operations on music files. This module also supports general file systems such as FAT16 and FAT32. It gets a Grove UART interface, a 3.5 mm audio jack and a micro-SD slot. With this module, you can add some noise to your silent applications.

The Grove Gas Sensor(MQ2) module is useful for gas leakage detecting(in home and industry). It can detect LPG, i-butane, methane, alcohol, Hydrogen, smoke, and so on. Based on its fast response time. measurements can be taken as soon as possible. Also, the sensitivity can be adjusted by the potentiometer. The Grove Gas Sensor(MQ2) is compatible with Arduino and Raspberry pi with a 5v power supply.

An Oxidation Reduction Potential (ORP) Sensor measures the activity of oxidizers and reducers in an aqueous solution, it measures the ability of a lake or river to cleanse itself or break down waste products. The Grove ORP sensor works for both 3.3V and 5V system, the Grove connector and BNC probe interface make it easy to use and very suitable for Arduino and Raspberry Pi project

Grove- Piezo Vibration Sensor is suitable for measurements of flexibility, vibration, impact, and touch. The module is based on PZT film sensor LDT0-028. When the sensor moves back and forth, a certain voltage will be created by the voltage comparator inside of it.

The first  change is MCU. In V3.0, the MCU is upgraded from to be ISD9160FI, which is more powerful than the old one ISD1820PY. How is it more powerful? Together with the newly added 2Mbytes flash, it allows you to record up to 83 seconds, much longer than the previous 12-sec record.