Arduino Forum

Using Arduino => Networking, Protocols, and Devices => Topic started by: mososki on Jun 14, 2019, 02:25 am

Title: Ethernet W5100 randomly unresponsive as web server
Post by: mososki on Jun 14, 2019, 02:25 am
I have a program that uses an ultrasonic sensor to measure the water height at my dock on Lake St. Clair and post it on a simple web page.  I used the example programming to do the server parts and it works fine until I get no response after a random time; a day or two.  I don't understand a lot of the programming but it works until it doesn't and then I have to go out and reset it.  I added a 12 hour reset circuit to see if I could prevent the problem, but it still locks up.  The unit is powered by a 6 or 12 volt wall wort and has worked thru winter and summer.  Am I missing something?

Title: Re: Ethernet W5100 randomly unresponsive as web server
Post by: Wawa on Jun 17, 2019, 04:58 am
The unit is powered by a 6 or 12 volt wall wort and has worked thru winter and summer.
What does that mean.
6volt (regulated) on V-in is borderline low, but is too low for the DC socket of the (assuming) Uno.
12volt on the DC socket or V-in is definately too high with a W5100 shield on top.
The Uno's 5volt regulator will randomly overheat and reset from the extra ~160mA current draw of the ethernet shield.

Am I missing something?
We... are missing most of it, including the attached code which we can't see or won't open.
Read the "How to post" sticky.
Leo..