3/28/2023 0 Comments Coolterm arduinoThat means if you power them at 6V, the TX and RTS signals will output up to 6V. The output signals (TX-O and RTS-O) will range from 0V for a LOW logic level, and VCC for a HIGH. Voltages on the input serial and control signals (RX-I and CTS-I) can be anywhere between 3.3V and 5V. The voltage supplied to the VCC/GND pins can be anywhere between 3.3V and 6V. These Bluetooth devices are designed to work seamlessly in both 3.3V and 5V systems. The 0V reference voltage, common to any other device connected to the Bluetooth modem. Like RTS, it's not required for most, simple serial interfaces. It should range from 3.3V to 6V.ĬTS is another serial flow control signal. This voltage supply signal is routed through a 3.3V regulator, then routed to the Bluetooth module. It should be connected to the RX of the other device. This pin sends serial data to another device. It should be connected to the TX of the other device. This pin receives serial data from another device. This output is not critical for simple serial communication. RTS is used for hardware flow control in some serial interfaces. Four pins are devoted to the serial interface, and the other two are for power. The PinoutsĮach of the four Bluetooth boards breaks out six pins. Don't place it near any big chunks of metal or enclose it in a Faraday cage, and you should be just fine. The modules all function in the same way, so this tutorial is applicable to all four.įinally, be aware of where the antenna is - give it some room to breathe. Materials and Toolsįor starters, you'll need one of the four Bluetooth modems we'll be covering in this tutorial: the Bluetooth Mate Silver, BlueSMiRF Silver, Bluetooth Mate Gold, or BlueSMiRF Gold. Then we'll get into hardware hookup and example Arduino code. We'll begin with an overview of the hardware, and the differences between each device. In this tutorial we'll cover everything you need to know about these Bluetooth modules. There's no messing with Bluetooth protocols or the stack, just send data over a serial interface, and it's piped through to whatever Bluetooth module to which it's connected. On top of those benefits, these modules are also very easy to use. Free of wires, your devices can be up to 100 meters away from each other. They're perfect for directly replacing a wired asynchronous serial interface. Each of these modules has a Bluetooth transceiver on it, meaning they're capable of both sending and receiving data.
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