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you can develop a variety of speech recognition applications
Digital I/O Pins:21
IPS display panel with a hardware resolution of 480×800
support Linux/Android
Reset Button: 1 × For resetting both MCU and LCD
Gravity: Lab Grade Analog pH Sensor Kit for Arduino IO Expansion you can develop a varietyNeed to measure water quality and other parameters but haven't got any low cost pH meter? Find it difficult to use with Arduino? DFRobot analog pH meter, specially designed for Arduino controllers and has a convenient and practical "Gravity" connector and a bunch of features. Instant connection to your probe your Arduino to get pH measurements at 0. 1pH (25 ). For most hobbyists, this great accuracy range and its low cost make this a great tool for