Also we have this Analog Electrical Conductivity Meter (With Temperature Compensation). Designed specially for Arduino controllers and has built-in simple, this Analog EC Meter is user-friendly and has practical features. After simple connections according to the diagram and uploading the program, you will be able to measure the EC value as a parameter affecting the root zone environment of your plants.
And then comes the second member in DFRobot Bluno family, the Bluno Nano. Came in a size of a gum, the Bluno Nano is perfect for BLE projects with limited space or weight. Bluno Nano also integrates a TI CC2540 BT 4.0 chip with the Arduino UNO development board. It allows wireless programming via BLE, supports Bluetooth HID, supports AT command to config the BLE, and you can upgrade BLE firmware easily. Bluno is also compatible with all Arduino Uno pins which means any project made with Uno can directly go wireless! Whatsmore, we also developed the App for the Bluno (both Android and IOS), and they are completely opensource, so that you can modify and develope your own hardware-software platform.
a size comparison of DFRobot BLE family
Expanded I/Os, expanded possibilities. This Beetle Shield is designed to attach a Beetle (DFR0282) controller for easy connecting servos and sensors. You can directly stack the Beetle onto the Beetle Shield. Some soldering will be needed for reinforcement.
The last one I want to introduce is our new mini MP3 player. The DFPlayer Mini is a small and low cost MP3 module with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an Arduino UNO or any other with RX/TX capabilities. It perfectly integrates hard decoding module, which supports common audio formats such as MP3, WAV and WMA. Besides, it also supports TF card with FAT16, FAT32 file system. Through a simple serial port, you can play the designated music without any other tedious underlying operations.