A data logger can record good data, but if you can't retrieve it, that data isn't doing its best work. To ensure successful data retrieval, possible issues with PC-to-datalogger communication through the serial server must be addressed. The following summarizes the 6 most common problems and explains how to easily fix them. Módulo BluetoothQ1: Power connectionMost data loggers require 10 to 16 V to be connected to the power input, and a good power supply is between 12 and 14 V. To ensure the data logger receives the required power, make sure the logger is not powered off. Some data logger models do this easily by lighting them up and blinking when active. Even if your data logger doesn't have this capability, you can still use a voltmeter to check the voltage at the input of the power supply.Q2: Serial connectionA proper serial connection must be made between the PC and the data logger. For example, some data loggers have two types of ports and it is important to use the correct interface for the port connected. Most data loggers are in the form of 9-pin serial ports, namely CS I/O and RS232. Use the RS232 serial port to connect the PC end with the RS232 port on the data logger, or use the USB to RS232 serial port cable to convert. If you want to connect to a CS I/O port, you must also use an RS232 to CS I/O converter, such as the SC32B opto-isolated RS-232 interface.Q3: Baud rate selectionThe baud rate selected in the software must match the baud rate of the datalogger's serial port. For example, some data records are at 9600 baud rate, and some are as high as 115200 baud rate, which means that 115200 has auto-baud rate enabled. The auto baud rate option will try to automatically adjust the baud rate to match the PC device, after a successful connection you can change the baud rate setting for the serial port on the data logger.Q4: COM port selectionThe COM port you select in the software must match the physical port on the PC used for the connection. This is rarely a problem on older computers with a built-in serial port, since that port is almost always COM1 and hasn't changed. However, most of us these days use USB to RS232 serial cables, and Windows assigns the cable a COM number. Windows usually assigns cables different COM port numbers depending on which USB port it's plugged into. However, depending on the driver, you can specify the port number to use. Invalid COM port selection is one of the most common communication problems:(1) An error occurs when an invalid COM port is selected;(2) Use the selectable COM port list in the software to verify the port number assigned to the cable;(3) USB to RS232 cable in the list of available COM ports;(4) If your USB to RS-232 cable does not appear in the list of available COM ports, please check whether the USB driver has been installed correctly.Q5: COM port availabilityThe COM port must be available and not already in use by another software program. When one piece of software opens a COM port, Windows blocks all other software from accessing it. When trying to use an already open COM port.Q6: PakBus address selectionThe address specified in the software setup must match the address of the data logger. Using the default address of the data logger is 1, if you have successfully connected to the data logger using the same computer before, the settings are probably correct. If you are unsure of the destination address of the data logger, you can use the device configuration utility to check the address of the data logger when connected.Módulo GPRS
