Running bluetooth on anydroid1/9/2024 ![]() ![]() It checks if the device matches, and calls connect if it does.Ĭonnect: This checks that the required objects are instantiated, and uses bluetoothGatt to connect to the device. ScanCallback.onLeScan : This is called when the LE scan discovers a device. SetScanning: This function checks that we aren't scanning or already connected, then calls the bluetoothAdapter.startLeScan. It is a bit more complex, for good reason: instead of simple send and receive functions, you have more control over how the data is handled. Let's get into the good stuff: Android programming. So now that you've got it all working, let's dive in to the gory innards! Next, type the string you want to send in the text box that has the prompt "String to send." Then press the "Send" button to send the string to the RFduino - The RFduino's response will appear underneath "Echo." You should see the words "Connected" at the top. Press the "Connect" button to connect to the RFduino. Click the "Run" button in Eclipse to run your program. If you're not sure how to do this, Google has great instructions. Make sure you have your Android device plugged in and ready to debug. Import the project into your Eclipse workspace. It will send the string, receive its echo, and print it. The script will search and connect to the RFduino, and then prompt you to enter a string. ![]() Then, run "python rfduinoecho.py " in the Python folder. ![]() If there is more than one device, the first one will probably be the computer's built in bluetooth transceiver, and the others will be dongles or other Bluetooth devices. To do this, run "hcitool dev" to determine the name of your computer's bluetooth device - this will list the bluetooth devices on your computer (in the format of "hci#"). If all goes well, nothing will happen initially, but when you connect/disconnect to the RFduino it will notify you via serial.īefore you use the python code, you have to find the name of your bluetooth device. Now upload the Arduino code to the RFduino. Hook these pins up to power, ground, RX, TX, and DTR on your FTDI module, with a 1k resistor in series on each of the RX/TX lines and a 10nF capacitor in series on the DTR line, to emulate the schematic. This means soldering wires to power, ground, GPIO0, GPIO1, and RESET on the RFDuino (pins 8, 6, 11, 12, and 9 respectively). For those going for the $15 option, you'll need to use an FTDI chip/programmer to emulate the RFDuino's USB shield ( see schematic). If you bought the dev kit, it should be as easy as plugging it into the USB port. You will also need to install the RFduino library and drivers.Īfter the libraries and drivers are installed, connect the RFduino to your PC. Basic Android programming (adding permissions, editing a layout, debugging on a hardware device)įirst, download the code at our Github repo, and move the RFduinoEcho folder to your sketches folder.Using a Linux terminal (the proper commands will be provided).Basic Arduino coding (uploading a sketch and installing a library).15 minutes to download, install, and run the echo programs with the development kit.Android device running 4.3 or higher (We used a Nexus 7).Bluetooth LE Dongle: $10 (not necessary if your computer has built-in BLE).The cost of this project will vary depending on what you have at hand - if you already have an FTDI programmer and some soldering tools, all you need is the $15 RFDuino, two 1k resistors, and a 10nF capacitor!įor those looking for an easy start, we recommend buying the following: Like this Instructable? Don't forget to follow us, favorite it, and check us out on Facebook ! For Linux users, we have a python program that utilizes the "hcitool" and "gatttool" Linux commands for Android users, we have an an echo app for those running 4.3 or higher. ![]() Our code demos the RFduino through a couple of simple echo programs, where we send a message to the RFduino, and it "echoes" it back. The RFduino works with Arduino sketches, so if you have previous experience with Arduino it's very easy to learn. We will be working with RFduino, a cheap microcontroller ($15 ea.) that includes a built-in BLE module. Bluetooth Low Energy is fantastic for wireless communication between devices - unfortunately, the documentation is less than fantastic. ![]()
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