Controlling Arduino boards with your smartphone
Arduino boards (or other MCUs) can be controlled via Bluetooth with your smartphone. There are pre-built apps for this or you can develop them yourself with MIT App Inventor.
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HC-05 and HC-06 Bluetooth modules
Detailed and step-by-step instructions for HC-05 and HC-06 Bluetooth modules. AT commands, circuit, pairing and testing of the Bluetooth connection.
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Radio rain warning system in a lunch box
A rain warning system that switches an alarm siren connected to a radio socket is presented in this post. Also: how to build the actual sensor yourself.
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Own radio protocols
How to develop your own radio protocols for 433 MHz using Arduino and Co without libraries. Two concepts are introduced.
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Radio sockets and hand transmitters
How to use radio sockets and hand transmitters using Arduino. The RCSwitch library is used. In addition: Build hand transmitters by yourself.
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433 MHz radio with Arduino
How to realize a simple 433 Mhz radio link with an Arduino, how to set up the RadioHead library and a small receiver module test.
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Programming the Arduino Pro Mini
Sketches can be uploaded to the Arduino Pro Mini using USB-to-TTL converter modules. How to do this and how to solve problems are described.
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