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Showing posts from January, 2011

Serial-to-Bluetooth

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I purchased this little Bluetooth module on eBay, another special all the way from China. It cost about £7 (delivered), but in bulk they can be bought for as little as £2. The module converts a TTL serial port such as the TX/RX pair on a PIC microcontroller to a basic Bluetooth communications link. As long as it is paired with a computer, 'phone or PDA which supports 'Serial over Bluetooth ,' a virtual serial port can be set up to allow any terminal program (or DIY software) to communicate wirelessly with the microcontroller . I got it tested last night using the basic 8-channel ADC program on the PIC 16F690, which outputs a stream of analogue values serially, usually via RS232. Anyway, after a bit of fiddling with the settings I got a test serial program written in Pocket Zeus working on the iPaq and a stream of data arrived wirelessly via the iPaq Bluetooth . Incredibly cool and lots of application, but starting with sending engine data via Bluetooth to the