DS323X is a low-cost, extremely accurate, I2C real-time clock(RTC) module. It can provide ±5%ppm accuracy (no more than 0.432s error) within the whole temperature range and lifespan, and is compatible with 2.5-5.5V wide voltage range. The current comsumption of the module is as low as 2uA when powered by batteries. This module can be used to measure ambient temperature with ±3℃ accuracy. and it has 25 times seismic resistance of the latter as well as better temperature stability. <br>
SGP40提供了一个完整的单芯片传感器系统，一个温控微热板和湿度补偿室内空气质量信号。结合Sensirion强大的VOC算法，传感器信号可以直接用于评价室内空气质量。低功耗(2.6mA)，响应速度快(2s)。来自传感器的数据可以直接用于评价空气质量，而无需校准。
Arduino library for Gravity: Analog Electrical Conductivity Sensor / Meter Kit (K=10), SKU: DFR0300-H
Arduino library for Gravity: Analog pH Sensor / Meter Kit V2, SKU: SEN0161-V2
Arduino library for Gravity: Analog Electrical Conductivity Sensor / Meter Kit V2 (K=1.0), SKU: DFR0300
Here comes the DFPlayer Pro-a mini simple but powerful MP3 Player! This MP3 player module supports four controlling modes: Arduino, AT command, on-board buttons, and ADKEY. You can directly press the on-board button to play or switch music without using a controller. By using a USB cable, you can easily copy your favorite songs into this module to play them any where you want, or use it as a sound card for your PC or Raspberry Pi after connecting them together.
