I'm new to using the Raspberry Pi 4, and every time I want to turn my Pi on through remote desktop, I have to connect my ethernet cable to it so it turns on. The problem is that my ethernet is away from my computer.
How can I turn on the raspberry pi through remote desktop without an ethernet cable, even though I connected it to the WiFi?
Related
I am working with an ESP32-CAM and have run into a bizarre problem with serial communication. I was able to burn the Edge Impulse (https://www.edgeimpulse.com/) firmware onto the ESP32 using a Raspberry Pi and their shell script, which invokes esptool. The firmware appears to write OK. Using esptool to query the chip id seems to work - it returns an id that changes when I swap ESP32 modules. However the Edge Impulse daemon cannot see the ESP32.
This is where it gets really weird. Using screen, I can't see anything on the USB port. I take the ESP32 and cable over to a different computer and I can see the firmware transmitting messages over USB if I use the Arduino serial monitor or the Termite serial program. However if I use Putty I see nothing. No messages, no gobbledygook, nothing at all, even if I reset the ESP32. I have checked (and re-checked) baud, port settings, flow control, local echo, CR/LF. I've tried resetting the ESP32 while watching output from Putty. I've also tried a different PC and gotten the same results.
I'd like to understand what is going on here. Can anyone offer an explanation?
thx
Burned firmware with esptool on Raspberry Pi - works
Queried chip_id with esptool on Raspberry Pi - works
(above shows that serial port, cable and ESP32 are good, I believe)
View USB output with screen and minicom on Raspberry Pi - nothing
View USB output with Arduino serial monitor and Termite from Windows 10 PC - works
View USB output with Putty from Windows 10 PC - nothing
If I have an Raspberry Pi 4, can I make something like this:
-to one USB port I connect pendrive
-the second USB port I connect with PC (with Windows10 system)
-when I move file from PC to pendrive, the file will be encrypted "inside" Raspberry(I want to create my own algorithm to this on Raspberry Pi)
-only way to decrypt file it will be connect pendrive to USB port in Raspberry and move back to PC.
Is this possible?
I setup my raspberry pi with a wifi connection (from a wifi extender), and had no issues. I could connect to the internet, everything was great.
I then changed my wifi extender, so went to my raspberry pi and logged into the new wireless. It says its connected to the wireless, but I can no longer connect to the internet or the network. Any thoughts?? When I switch back to my original wifi connection / extender, it works fine again.
Thanks
EDIT: This seems to be related to this!
https://github.com/raspberrypi/linux/issues/1542
In my opinion, I honestly dislike wireless. You could always get a Ethernet cable and plug it in, and it'll never do the error again. You can find them very cheap, and it's faster than wireless.
But, for some friendly Raspberry Pi reference, if you have another computer (it doesn't matter how old or slow, it'll work either way), you can download VNC Viewer, plug in your Ethernet cable to your Raspberry Pi (or you can use a WiFi adapter too!!), then find your Raspberry Pi's IP address, and use VNC Viewer to control your Raspberry Pi from that other computer. That's what I'm doing.
I hope I help with this :)
I'm trying to connect two arduino unos with ethernet shields with each other via crossover cable.(codes taken from server client) Both of them works when I connect them to a PC separately, however they can't communicate between each other(No lights except red on the shield lights up, connection fails). However it only works if I plug all of them in the switch. every device has static ips and the same subnet, but an interesting thing is that if I unplug the pc from the switch, arduinos stop communicating, even if the pc has a different subnet assigned.
I have an Arduino with a 433mhz receiver attached. I've connected this to my computer via a usb to serial cable.
Connected to my laptop (development machine) it works fine with it (>15 metres), but when connecting it to the Raspberry pi (deployment machine) via the same USB cable the range is REALLY poor (<1 metre).
I've tried using another laptop and again it works fine. Suggesting something is wrong/different going on with the Raspberry Pi.
I measured the voltage at the 433mhz receiver and it was slightly lower when it was connected to the raspberry pi. I tried to rule this add by adding a voltage booster circuit but it made it worst if anything.
laptop = 4.88v
raspberry pi = 4.3v
raspberry pi using booster circuit = 4.98v
I've not tried an external power supply yet.
Any thoughts on what might be causing the problem?
Thank you in advance!
I connected up an external power supply to the receiver instead of using the power coming from the Raspberry Pi / Arduino. This made an amazing difference to the range.
For the receiver module I was working with 5.5V - 6V seemed to give the best range. Anything below 5V was pathetic.