Show Posts
Pages: [1]
1  Using Arduino / Installation & Troubleshooting / I can't upload a new sketch to the arduino uno r3 on: August 20, 2014, 10:57:10 am
A few months ago I powered my arduino with a 12v adapter and after 30s it started smelling so I disconnected it drom the power supply immediately. It was working properly. However now when I try to upload a sketch I get this error: "avrdude stk500_getsync(): not in sync resp=0x30". I get the error on linux and on windows as well with properly installed drivers and correct serial port. It discovers the arduino but doesn't upload to it.

I tried to erase the bootloader and install it again but it doesn't discover the arduino in dfo mode. I tried with dfu programmer under linux and with atmel flip under windows but both don't work for me. I try to put arduino dfu mode by grounding the two pins as showed in the image and the arduino disappears for a second and then is found again however nothing happens.

Am I doing something wrong? Is there any chance to fix my arduino?
2  Using Arduino / Sensors / Re: What cable is needed for DHT22 ? on: October 11, 2012, 03:00:57 pm
Here are the sensors: DHT22 and BMP085

I don't want to use flat cables because the cable will pass through a hole. Since I am a beginner I am not very familiar with the cables. I've read many tutorials and watched many videos about how to connect the sensors but they are all using breadboards. I want to use a long cable, not some 5sm wires. Can you tell me exactly what the cables for the two sensors have to be, because I don't really know what am I looking for at the moment smiley-confuse?
3  Using Arduino / Sensors / What cable is needed for DHT22 ? on: October 10, 2012, 02:50:17 pm
Hi guys! I've read that the DHT22 allows using of a longer cable but I didn't find any information about the cable itself. What the cable has to be? (can you give me link) I will use 2-3m cable because I want to place the sensor on a specific place.

I have another question - can I use the BMP085 sensor with a cable? If yes - what cable do I need?
4  Using Arduino / Networking, Protocols, and Devices / Re: A few questions about connecting arduino to the internet via wifi using router on: October 10, 2012, 02:31:09 pm
Thank you guys for all the answers.

@zoomkat - Yes, I'll have power.

I personally think that using an ethernet shield is better because i can use the ethernet library which is very nice and easy to understand.
I don't like connecting arduino to the serial port of a router because basically it doesn't have a "direct connection" to the internet. (correct me if I am wrong) This means that there must be sth that constantly controlls the data from the router to the arduino and from the arduino to the router. (much complicated) Although it is the cheapest method I don't really like to try it because I am a beginner with arduino smiley-grin.

I am planning to collect the data from the arduino web server page with a VPS with a php cron job and store it in a MySQL database, so that I can play with it in web or software apps.

Final question: Will my arduino have internet access if I put TP-Link TL-WR702N in bridge mode with my home wi-fi network, and simply connect it with the ethernet shield with a lan cable?

I have some other questions but they are not related to networking so I'll open another thread.
5  Using Arduino / Networking, Protocols, and Devices / A few questions about connecting arduino to the internet via wifi using router on: October 06, 2012, 01:44:22 pm
Greetings! I am new with arduino so firstly I will explain what am I trying to achieve and then ask you some questions about it.

I want to make a simple weather "station" which prints the temperature and humidity on a web page.

I've read that this can be done with the Arduino Ethernet Shield and the Ethernet Library. Great, but I will place it outside the house so I want it to connect to my wifi network and do the exactly same thing. I've seen and read about the wifi shields but they are quite expensive. After reading for hours I found some articles that explain how cheap routers can be hacked with dd-wrt and used as clients (bridge mode) to connect to the main wifi network. There is one thing that I didn't understand - is this only to controll remotely the arduino or arduino can access internet (and ethernet library can be used) ? (link to the article)

Another method I found is this. I think that this is better than the one i explained above. It uses an ethernet shield and a cheap router which offers bridge mode. A lan cable is connected to the ethernet shield and the router and according to the article the arduino can access the internet.

So my question is - has anybody tried one of these methods and which one do you recommend me to use? Are there any other cheap methods? Do you have any suggestions about them?

Excuse me if there are any mistakes but I am not a native speaker.
Pages: [1]