This is the utmost most important step. The wireless do not disturb light why we highly recommend a USB to serial RS232 adapter with a processor chip from either FTDI or Silabs is because these are simply the best. We have extensive experience with these which shows us that these processor chips works with the majority of devices and equipment on the market. The drivers are very stable, easy to install and compatible with all versions of Windows 32/4-bit, Mac, Linux.

2. Preferred serial driver chip: ZyWyn, Maxin or NI

The serial driver chip is what is actually communicating and providing the power signals for your device connected to the USB to RS232 serial adapter. We recommend a brand name driver chip from ZyWyn, Maxin or NI because these are very reliable and works well with the FTDI and Silabs processor chips.

3. At least 5VDC output power at serial connector

We recommend a USB to serial adapter with at least 5VDC power output for the TX/RX signals. This will ensure a strong communication signal and that your device gets sufficient power. The output power is measured from signal ground to the Tx signal and the Rx signal.

4. Build-in static protection to at least 600W

Built-in static protection protects the USB to serial adapter against high voltage spikes created either by static electricity or by surges in the supply voltage. This problem can exist both at the USB end and the serial RS232 end.

5. LED lights for TX and RX activity

Not required but very nice to have. Being able to actually see when data is transmitted through the adapter is a big advantage when troubleshooting. This way its easier to find out where the problem lies; if its your computer, your device connected to the adapter or the adapter itself.

Things to avoid:

– Avoid adapters with a low-cost processor chip such as Prolific. The drivers are poorly written, incompatible with newer operating systems and creates unreliable communication.