The PCL-746+ from ProMicro is a four-port serial communication interface card, and by using on-board jumpers, each port can be configured individually to either RS232, RS422, or RS485. The card uses 16C550 UARTs and provides improved interrupt handling for reliable operation at transmission speeds of up to 115,2 Kbps. Both standard and enhanced operation is possible. In standard mode each of the four ports can be set up as either the address or the IRQ channel, while in enhanced mode, all four ports can be set to share the same IRQ.
When an on-board interrupt occurs, the interrupt status register indicates which port has generated it. The shared interrupt can be set to most common (extended) AT interrupts. This simplifies programming, speeds up interrupt pro-cessing, and frees up interrupts for other devices.
The RS485 mode automatically senses the direction of incoming data and switches its transmission direction accordingly making it act as an RS232 network. Application software written for half duplex RS232 can be used without modification. In addition, the user can simply build an RS485 network with just two wires.
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The battle for the 6 GHz spectrum band is heating up in South Africa, mirroring global debates on the allocation of spectrum between Wi-Fi and cellular operators.
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The winners of the 2024 IoT Evolution 5G Leadership Award were recently announced, with Quectel walking away with an award for its modules which make 5G features more easily accessible for IoT applications, notably the company’s RG255C-GL.
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What is likely to happen during the sunset period for 2G and 3G signals, especially on the back of already near-obsolescence of 2G network equipment, is for the availability of the connectivity mediums to begin to reduce between now and the shutdown date.
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Editor's Choice Telecoms, Datacoms, Wireless, IoT
Creating a solution that enables real-time tracking of airline baggage on a global scale seems like an impossible task when considering the number of airlines, airports, and passengers that flow through and between them.
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