Serial port interfacing with GPSes

GPSes are becoming commonplace, not just as the standalone devices we have in our cars, but perhaps even more often as a capability built into our smartphones. In the majority of cases, the data that those GPSes generate is used by and stored in the device itself, but occasionally people want to access that data […]

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OBDII Automotive Diagnostics and serial port connections

Vehicles manufactured after 1996 have a capability that few drivers realize exists: your vehicle has an interface to its computer that can provide a panoply of information about your vehicle’s operation and status, second by second. This interface, the On-Board Diagnostics (OBD) port, gives information on speed, acceleration, fuel use, temperatures (of oil, coolant, air […]

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POS to DVR or NVR Integration: A Serial Splitter

Eye in the Sky (www.eyeintheskycams.com) wanted to develop a simple and effective method of collecting receipt/journal printer information from a Ruby POS system, print it, and simultaneously send it to an NVR (Network Video Recorder) for text overlay. The solution required taking the serial port printer outputs from a Ruby POS system to a dumb […]

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Parallel-PCI for CAMAC Control

Computer Automated Measurement and Control (CAMAC) is a long-established standard for data acquisition hardware, often used in the nuclear and particle physics fields. The good news about CAMAC systems (when enclosed in a chassis, they are called CAMAC “crates”) is that they seemingly last forever. The bad news is that they are very expensive, often […]

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Raspberry Pi serial port: Ribbon or no ribbon?

The interest in an RS-232 serial port for the Raspberry Pi has LAVA considering making a simple GPIO-to-RS-232 DB-9 serial port board. This little item would plug onto the Raspberry Pi’s GPIO pin header, take the Raspi’s UART signals up to RS-232 levels, and present them on a conventional DB-9 (aka DE-9) connector. It would […]

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RS-232 Serial Crossover Cables

The range of serial cabling includes crossover cables, sometimes called null modem cables. This post fills out the information on crossover cables, as at times confusion about them can cause systems not to work. When two pieces of Data Terminal Equipment (terminals, or DTEs) need to be connected to each other, or two pieces of […]

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DNC Machining Control

Controlink Systems makes software designed for controlling machining and manufacturing equipment, over RS-232 (the standard interface). Direct Numerical Control (DNC) is used to control machining equipment when the machine itself does not issue the processing commands. Controlink Systems software meshes nicely with LAVA’s serial interfaces, whether PCI, PCIe, or Ethernet-to-Serial device servers.

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Plasma Cutter Control

Tiba Restaurant Equipment makes high-end consumer and commercial kitchen and restaurant equipment, including hot tables, counters, refrigerators, sinks, and barbeques. Their work consists largely of metalwork design and fabrication, primarily in stainless steel for pieces of equipment, and in galvanized metal for ductwork for installations in restaurants, hotels, banquet halls, kitchens, and residential homes. Tiba’s […]

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Power over Ethernet (PoE) Serial Device Servers

Our popular one- and two-port serial device servers — the Ether-Serial Link 1-232-DB9, the 2-232-DB9, the 1-232-RJ45, and the 2-232-RJ45 — have now been spun into PoE (Power over Ethernet) versions. Because these device servers are designed to draw their power from the same Ethernet cable that is used for their Ethernet interface, there is […]

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RS-232 full voltage range

When it comes to RS-232 electrical characteristics, there is one important thing to note: the voltage range for signalling in RS-232 is very wide, from 3 to 15 volts, plus or minus. The implication is that designers of serial port boards, such as LAVA, have wide latitude for electrical design, according to the specification. In […]

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