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1  Using Arduino / Microcontrollers / Re: Is it possible to program an Attiny85 with a USB-to-TTL converter? on: August 07, 2014, 05:08:55 am
Why not get a proper ISP programmer like this.

Thanks for the link! I didn't know they were so cheap. Will order it right away :-)
2  Using Arduino / Microcontrollers / Re: Is it possible to program an Attiny85 with a USB-to-TTL converter? on: August 07, 2014, 03:14:11 am
Thanks for all your feedback, I see it is more complicated that I thought. My ideas was simply this: 4 pins on Arduino are used to program the Attiny. If the USB-to-TTL converter could mimic the same digitial signals, it might be possible to bypass the Arduino and upload straight from the IDE. But there is obviously more to this, so I will just stick to programming it with my Arduino.

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some time ago i wrote a 64 byte bootloader for tiny13 that also works unmodified on tiny24, tiny25, etc. (works on the mega versions too but theres little point to that). unfortunately my most convenient programming software only runs on real mode os so probably not of great interest to windows users.

I'm actually a Linux guy. Could you tell me a bit more, it sounds interesting!
3  Using Arduino / Microcontrollers / Is it possible to program an Attiny85 with a USB-to-TTL converter? on: August 05, 2014, 04:39:39 pm
I currently use my Arduino to program Attiny85. As I have one of these USB-to-TTL adapters I am wondering if it is possible to program Attiny85 with it, to free up my Arduino. I know it is possible to program Atmega's with such a thing.

If it is in fact possible to use the converter as a simple programmer for Attiny's, how should I connect the converter to the Attiny?
4  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 22, 2013, 08:23:44 am
My system uses 10.0.0.1 for gateway and DNS, and 255.255.255 as subnet mask. Anyway, I have also tried to set these values manually in the sketch to no avail.
5  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 22, 2013, 04:22:44 am
Could it be a power issue.

I found that running my etherten with one Freetronics DMD panel was ok, but the ip would drop out, after one udp request decoding. I was running from usb power. Once I provided a proper powerpack then the ip did not drop out anymore...Maybe this could be your problem.

That was a very good suggestion and I really hoped the power issue could be the culprit. Because my Raspberry Pi behaved strange until I found that the power supply was a bit too meager. After I exchanged it with a better one, it worked well.

But alas, in this case it didn't help. I connected a capable 9V switch mode supply and measured 4.98V on the 5V pins but still, the shield cannot operate. It must be defective.
6  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 15, 2013, 05:05:52 pm
Hmmm, it is only about half the times it echoes back the local ip. So the board most be broken.
7  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 10:05:14 am
Hmmm, it does print "Starting w5100 192.168.2.2"

What does that tell you?
8  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 08:26:09 am
If all the pins are connected correctly (check the ICSP pins closely to insure a connection), then you have a bad ethernet shield.  smiley-sad

That is also my conclusion. Is it possible to send some ICSP commands to the shield to test it?
9  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 08:19:19 am
No SD card present. Powering down does not help.
10  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 08:11:04 am
Never do that. It will cause a fail. Like ip addresses, the mac addresses on the localnet must be unique. Otherwise it will not be able to connect to anything.

Sure, but you didn't get the point! I deliberately assigned the same mac address and would have expected the collision warning lamp to light up. It didn't, which tells me "something is rotten" :-)
11  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 07:06:27 am
Now I suddenly make it obtain an IP from DHCP. But only one time, it's back to "normal" again.
12  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 07:00:30 am
I have tried to assign 10.0.0.15 which is not in use to the current MAC address of the Arduino to no avail. I also tried changing the MAC address to the same value as my PC but there was no light in the COLL lamp.

I did something else for a test. I connected the shield directly to the LAN connector on my PC. It still didn't work but at least my PC sees that it is connected to a network. If I unplug it, the notification icon in the tray will show that it is not connected.

Is there are any command I can run on the Linux box to check if the specific MAC address is present on the network?
13  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 06:16:57 am
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The shield is connected to the router.
Does the router know about the Arduino? Can you ping the Arduino?

No to both.

As mentioned in #0, the weird thing is that I actually twice did get a succesful connection out of now perhaps 200 attemtps.
14  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 10, 2013, 05:54:55 am
It waits forever after printing the line "Starting w5100..."

Nothing happened so far after 15 minutes.
15  Using Arduino / Networking, Protocols, and Devices / Re: Ethernet Shield cannot connect on: January 09, 2013, 07:11:29 pm
#1: Yes, there are the settings I use

#2: Zyxel routers often use this IP range :-)

The shield is connected to the router.

The Linux box is 10.0.0.2

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