Raspberry Pi Forums

Cooloo

Hi All,

Is there anyway of connecting to WiFi (headless) using a WiFi dongle?

Cooloo

@fruitoftheloom Yes, I installed WebIOPi

Cooloo

Hi all, I want to be able to remotely control a LED, but, what I realised is that I need to do port forwarding. I am having problems with the port forwarding, so, I found an alternative, Weaved. I installed the Weaved services onto the Raspberry Pi 2 and I don't know what to do now. https://www.wea...

Cooloo

Hi all,

I want to be able to remotely control a LED, but, what I realised is that I need to do port forwarding. I am having problems with the port forwarding, so, I found an alternative, Weaved. I installed the Weaved services onto the Raspberry Pi 2 and I don't know what to do now.

Cooloo

I think I have to do port forwarding. Does anyone have ideas on how to do it?

Cooloo

I am trying to wirelessly control an LED through the internet. How am I to connect the webpage to the Raspberry Pi?

Cooloo

Zorac wrote:you need some sort of onclick portion within your buttons, something like this

onclick="location.href=\''.$_SERVER['PHP_SELF'].'?led=on\'"

then for you php check if led isset and if it equals 'on' or 'off'

I am lost with the onclick portion

Cooloo

This is the code for the on and off buttons <html> <head> <title> LED </title> </head> <body> <br> <form method = "GET"> <button class = "btn" name = "ledOn"> LED On </button> <button class = "btn" name = "ledOff"> LED Off </button> </form> <?php if (isset($_GET['ON'])) { exec("sudo python /home/pi/...

Cooloo

chrisoh wrote:You're welcome. You lost me with the buttons though. Chocolate I hope, mmmmm

Ok...on the webpage, there are 2 buttons (LED On and LED Off)
I want to be able to remotely turn on and off the LED by pressing the buttons.

Cooloo

When I transferred it to /var/www/html it worked.
Now I have another problem
I want to be able to turn on and off an LED using the webpage, but, when I click the buttons, it is not working.

How can I fix this?

Cooloo

scotty101 wrote:Where have you placed the file example.php?

I think it is supposed to be inside /var/www/

That is where I placed the file

Cooloo

I set up the raspberry pi as a server, but, I am unable to run a webpage. When I try to run a simple webpage on my computer, I am getting this error.

: error.PNG (10.47 KiB) Viewed 1871 times

I am not sure why that is happening. How to fix this problem?

Cooloo

When I first started to use it (with a WiFi dongle), the IP address was 192.168.1.18. Then, I tried connecting to that address (headless) and it was not working, then I realised that it changed to 192.168.1.2. Now, I am unable to connect to the last address because I assume that it changed again. Sh...

Cooloo

Thanks for all the help. I finally got the MCP 3008 working properly with the sensor. The voltage divider that I didn't have in initially was the problem. Thanks a lot again
Now onto connecting the relay. Will let you all know how it goes.

Cooloo

Thanks as always for your assistance. I switched to using the MCP 3208 as I blew the 3008. I connected the voltage divider 2k4 and 4k7 as shown in the attachment. (please excuse the tiny pic, I cropped the photo to get the 65k limit). I'm now getting a reading of 310 (remember I was getting 1024 bef...

Cooloo

Dout -> SPI_MISO will fry the MISO pin on your Pi if you don't divide it down. Never hook up a 5V output to a 3v3 input without dividing the voltage down tot the 3v3 range. This is how all the parts are connected. I hope you can understand this information. From Current sensor:-> 1) Vcc -> 5V on th...

Cooloo

This is how all the parts are connected. I hope you can understand this information. From Current sensor:-> 1) Vcc -> 5V on the RPi2 2) GND -> GND on RPi2 3) Vout -> CH0 (pin 1) on MCP3008 (the ADC) From ADC to RPi2 1) Vdd and Vref -> 5V 2) AGND and DGND -> GND 3) CLK -> SPI_SCLK 4) Dout -> SPI_MISO...

Cooloo

Thanks for your speedy response Mikronauts. I greatly appreciate your advice. Of course the circuit was connected with the sensor grounded and 5V from the pi (even though I did not indicate that in my previous posts). The code is in fact running but the issue is, as I explained earlier the 1023 read...

Cooloo

I've connected the Vout from the sensor directly to channel 0 in the ADC and getting 1023 reading wether the appliance is on or off.
Is connecting Vout directly to the ADC correct or are other components (resistors capacitors etc) needed?

Cooloo

Yes I'm using an ADC but I'm only getting a High/on reading whether the appliance is on or off

Cooloo

I switched the sensor to the hot (live) and I'm getting the same reading (1023=5V) whether the appliance is on or off. I should be getting 2 different values for on and off. Any thought on this?

Cooloo

I am trying to measure current using the ACS712 module along with the MCP3008 ADC.
Is the module connected to the live or neutral of the supply? I am getting a large current reading (when it is connected to the neutral) whether current is flowing in the circuit or not.

Cooloo

Could you suggest an ADC that is compatible with the ACS 712 and the RPI?

Cooloo

Boyoh thanks for your invaluable advice. I saw on Youtube a circuit where the ACS712 current sensor was connected directly to the Arduino board without using the optocoupler as an interface https://youtu.be/ob_h5PNcrBM. So I guess it can also be used in this way with the RPI. What are your thoughts?

Cooloo

Thanks a lot for this suggestion. I saw this relay Sun Founder 2 Channel 5V Relay Shield Module for Arduino UNO 2560 1280 ARM PIC AVR STM32 Raspberry Pi which is used with ordinary plugs. This relay would only turn on and off the power to the appliance though. I would like to determine the status (w...

Search found 27 matches

WiFi Setup

Re: Weaved Services

Re: Weaved Services

Weaved Services

Re: Running a Webpage

Communication between a webpage and raspberry pi

Re: Running a Webpage

Re: Running a Webpage

Re: Running a Webpage

Re: Running a Webpage

Re: Running a Webpage

Running a Webpage

IP address

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Re: Current Sensing

Current Sensing

Re: Power sensors

Re: Power sensors

Re: Power sensors