Practical Usage

Tag: wireless

  • MRe-2: XBee Midi emitter

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    rt
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    In the previous post, I  explained that I temporarily abandoned trying to use the RFM12B radio transceiver to exchange Midi information between two devices. This post explains how I successfully used the XBee radio transceiver to achieve sending information between a Midi source and a computer. The XBee radio comes in many different versions. The…

  • RFM12B: Dealing with radio interference

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    rt
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    This is a screenshot from the serial monitor of a Jeenode (Arduino compatible) connected to my computer. It runs a program that will listen to incoming radio messages through its RFM12B radio transceiver. In this window, you can clearly see too lines that start with “OK”. These are real messages coming from my EM-1 Energy Monitor.…

  • MP-1: Improving reliability with ACK and adding a PANIC! button

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    rt
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    Since the Jeenode’s RFM12B is a bit slow (transceiving at 49.2K bps) and midi is a bit slower at 31250 bps, the processor doesn’t have much time to process all the traffic. Keep in mind that the Jeenode has to be able to receive MIDI messages on the serial port, receive incoming wireless transmissions through…

  • EM-1: Energy Monitor – Completed Hardware

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    rt
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    Christmas vacations are for having fun. I did have fun! I completed a project that had been sitting idle for some time: The Energy Monitor for the house/office. The project is described over a few other posts. Most of the theory and practical application is explained in detail at openenergymonitor.org. I adapted their circuits for…