4 ms·

Announced 2+ years ago (almost 3, now that I look: https://www.espressif.com/en/news/ESP32-C5 https://www.espressif.com/en/news/ESP32-C5 ) and sampling 1+ year

by bri3d 1y ago

Announced 2+ years ago (almost 3, now that I look: https://www.espressif.com/en/news/ESP32-C5 https://www.espressif.com/en/news/ESP32-C5 ) and sampling 1+ year ago, good to see it finally come. 5GHz support is increasingly important.

mort96 1y ago
Why is 5GHz increasingly important? For most IoT applications, isn't the better wall penetration of 2.4GHz more important than the increased peak speeds of 5GHz?
- zamadatix 1y ago
  Some places are wanting to go dual 5 GHz radios on APs (for general client density) rather than 2.4 GHz and 5GHz radios but 2.4 GHz only IoT devices force you into keeping a 2.4 GHz radio infrastructure active. These kinds of environments tend to turn the power down on 2.4 GHz anyways as "goes through walls" can actually be a bad thing for coverage when multiple APs are at play (SNR is more important than raw power). For a typical consumer home use case continuing to use 2.4 GHz is most likely ideal though. Though some apartment complexes have such bad 2.4 GHz interference even that might not be universal.
- wrigby 1y ago
  Yes and no, depending on the environment. In an apartment building, the wall penetration is a liability, as the 2.4ghz spectrum, with only three channels, gets extremely congested. Going 5ghz helps immensely, with more channels available and less penetration, so you get more spectrum reuse.
- mystified5016 1y ago
  Pop open a WiFi scanner sometime. Unless you're living way out in the country, the 2.4GHz spectrum will be pretty much full. Everyone has a 2.4GHz router and you're likely to get a lot of interference. Really it's the same reason computers moved to 5GHz, and now 6GHz.
- bityard 1y ago
  YMMV but in my house, with a commercial-grade wifi AP, I found that devices on 5 GHz get much better speed and range due to all the local noise on 2.4 GHz.
- ajross 1y ago
  It's not the peak speeds, it's the spectrum use. The 2.4GHz ISM band has 100 MHz of available spectrum, the 5GHz wifi spectrum is 740 MHz wide, and is still occupied by fewer deployed devices. To an IOT application, it's the difference between chatting with a friend at a quiet outdoor cafe and trying to shout at her in a crowded bar.
- cptskippy 1y ago
  In my opinion 2.4GHz is rapidly becoming a non-starter. Companies like Eero, TP-Link, and Spectrum are using 40Mhz wide swaths of 2.4GHz for their Mesh backhauls. Sitting in my home office in a single family detached home, I can see 24 different SSIDs all running 40mhz on the 2.4GHz band with 7 having a signal strength greater than -80dBm. 5Ghz doesn't propagate very far and putting IoT devices inside your home on 5Ghz makes a lot of sense. With 6Ghz coming on line and being reserved for high bandwidth applications, 5Ghz for IoT makes even more sense.

by bri3d 1y ago

mort96 1y ago

Why is 5GHz increasingly important? For most IoT applications, isn't the better wall penetration of 2.4GHz more important than the increased peak speeds of 5GHz?

zamadatix 1y ago
Some places are wanting to go dual 5 GHz radios on APs (for general client density) rather than 2.4 GHz and 5GHz radios but 2.4 GHz only IoT devices force you into keeping a 2.4 GHz radio infrastructure active. These kinds of environments tend to turn the power down on 2.4 GHz anyways as "goes through walls" can actually be a bad thing for coverage when multiple APs are at play (SNR is more important than raw power). For a typical consumer home use case continuing to use 2.4 GHz is most likely ideal though. Though some apartment complexes have such bad 2.4 GHz interference even that might not be universal.
wrigby 1y ago
Yes and no, depending on the environment. In an apartment building, the wall penetration is a liability, as the 2.4ghz spectrum, with only three channels, gets extremely congested. Going 5ghz helps immensely, with more channels available and less penetration, so you get more spectrum reuse.
mystified5016 1y ago
Pop open a WiFi scanner sometime. Unless you're living way out in the country, the 2.4GHz spectrum will be pretty much full. Everyone has a 2.4GHz router and you're likely to get a lot of interference. Really it's the same reason computers moved to 5GHz, and now 6GHz.
bityard 1y ago
YMMV but in my house, with a commercial-grade wifi AP, I found that devices on 5 GHz get much better speed and range due to all the local noise on 2.4 GHz.
ajross 1y ago
It's not the peak speeds, it's the spectrum use. The 2.4GHz ISM band has 100 MHz of available spectrum, the 5GHz wifi spectrum is 740 MHz wide, and is still occupied by fewer deployed devices. To an IOT application, it's the difference between chatting with a friend at a quiet outdoor cafe and trying to shout at her in a crowded bar.
cptskippy 1y ago
In my opinion 2.4GHz is rapidly becoming a non-starter. Companies like Eero, TP-Link, and Spectrum are using 40Mhz wide swaths of 2.4GHz for their Mesh backhauls. Sitting in my home office in a single family detached home, I can see 24 different SSIDs all running 40mhz on the 2.4GHz band with 7 having a signal strength greater than -80dBm. 5Ghz doesn't propagate very far and putting IoT devices inside your home on 5Ghz makes a lot of sense. With 6Ghz coming on line and being reserved for high bandwidth applications, 5Ghz for IoT makes even more sense.