![]() Imagine that the 2.4 GHz and 5 GHz bands are freeways, and each of the WiFi networks in your router's vicinity are semi-trucks. At their theoretical best, that means they support aggregate speeds up to 2,167 Mbps or more.įor most households, 5 GHz connectivity is what makes these routers really shine. In addition to supporting the 2.4 GHz Wireless-N standard, dual-band routers support the 5 GHz frequency band, operating on the newer 802.11ac standard. Single-band routers won't include modern features, like app-based monitoring or device prioritization.Given the age and ubiquity of 2.4 GHz devices, you'll likely experience lots of signal interference, which can reduce WiFi speed and stability.Lower maximum speeds than multi-band alternatives.Lower frequency is better at penetrating obstacles such as walls, doors, furniture, etc.Compatibility with almost all devices, as multi-band devices typically support 2.4 GHz connections (but not vice versa).Though single-band, 2.4 GHz routers are accessible and low-priced, they come with a fair share of drawbacks, given the natural progression of WiFi tech. ![]() ![]() More likely, though, a single-band router operates on the (somewhat) newer 802.11n standard, also known as "Wireless-N." Wireless-N routers on a 2.4 GHz band offer theoretical speeds of up to 800 Mbps-"theoretical" meaning that you'll probably never see these speeds during day-to-day use, given real-world factors such as your Internet service limitations. The iPhone 3G and 3Gs use this standard, for instance. Older, single-band routers operate on the 802.11g standard (introduced in 2003), which caps data speeds at 54 Mbps. These standards are basically rule books that make sure routers and online devices are on the same page, ensuring that your Roku plays just as nicely with your router as your tablet does.Ī single-band router is limited to, as you might've guessed, just one frequency band-the 2.4 GHz frequency band, to be exact. At this point, I'm out of ideas, and I have decided to ask for help.Way back in 1999, the Institute of Electrical and Electronics Engineers (IEEE) introduced the idea of wireless standards-that's what those "802.11" numbers that you see on your WiFi-enabled gear represent. I know the serial port works, because I can connect to an old network switch with it with no problem at all, and its serial port device is /dev/ttyS0. The computer I'm using to try to connect to it runs Debian Stretch, and I've tried minicom, cutecom, and other serial terminal emulators. I've even tried a null modem adapter, and reversing the gender pinout of the wires, but I haven't been able to get it to work. I've been going by this diagram of the serial pinouts. This is the article I've found which I've been referencing the most: There is a fourth pin, which I read from various articles on the internet NOT to hook up when I try to connect to the debug port from a computer. I was able to verify the GND pin on the router's PCB, and two of its serial pins with the logic analyzer. I've tried dozens of various baud/data bit size/stop bits/parity/terminal type (VT102/ANSI) and other settings, but I haven't been able to find a compatible combination. However, I keep getting garbage characters when I try connecting to it from an actual DE-9 serial port using the configuration detected in the data capture. I am able to view ASCII characters in the captured data. I hooked up my logic analyzer to it and found valid baud, and other settings. I have a bad Linksys wireless router, and during my attempt to repair it, I found its serial debug port.
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