i want to connect multiple arduino board using usb 2.0 hub to raspberry pi does it work or not, For one arduino board (nano) using blynk over uart it work but i want to connect via hub coz ethernet module heat up while uart communication work pretty well for mine
i found that usb 2.0 length can go upto 5 meter without problem that is enough for me, i tried esp8266 but 3.3v i/o not suitable for 5v sensor that why i think about to try with usb hub
I guess it depends on whether or not the Pi creates multiple virtual com ports when multiple devices are plugged into the hub.
You’d be much better using a NodeMCU or Wemos D1 Mini. They can work with 5v sensors.
Pete.
forgot multiple devices,give me suggestion to give power to wemos mini over long wire(cat 6 10m) or any other power transmission method this helps me a lot @PeteKnight
The NodeMCU and Wemos D1 Mini just need 5v via their microUSB connector, so you could do this in the same way 5gat you planned to power/connect your Arduino boards.
Alternatively, you could use Ethernet POE, with a power injector at one end of the cable and a POE splitter at the other end which powers your NodeMCU. Ethernet signals can also be send down the wire at the same time, but obviously the NodeMCU uses WiFi so they won’t use the Ethernet data wires.
I have a NodeMCU in my weather station on my rood, and I happened to have an Ethernet cable nearby so that’s powered via POE.
The weather station end uses one of these…
Pete.