[Lab] [Bulk] Re: ESP8266 issues and data logger (Ken McKinnon)

[Jim]

Do you mean wack damn thing or watchdog timer

Sent from my iPhone

> On Dec 8, 2014, at 4:48 PM, Ken McKinnon <klmckinnon at rogers.com> wrote:
> 
> Your solution sounds pretty good.  I didn't realize that it was the ESP8266 vice the Arduino, guess I missed that.....
> 
> I once had to fly to Resolute Bay (in the dark season) when a site failed, we couldn't connect to the site and it would not respond at all.  I fixed it by hitting the reset on the communication controller unit.  We implemented the WDT after that several $K trip.
> 
> Ken
> 
> 
>> On 2014-12-08 3:05 PM, Adrian Jones wrote:
>> Ken,
>> You raise an interesting idea but I'm not sure that this is required.
>> Watchdog timers are great if the Arduino misbehaves. However, the issue I
>> have is that it is the ESP8266 that  gets stuck in a loop, not the Arduino.
>> When it is in this 'stuck' state, subsequent AT commands to the ESP8266
>> throw errors (which I can capture) and this is a good indication that it
>> needs resetting.
>>  I already use an Arduino pin (via Schottky diode and 10k pull-up to 3.3V) to
>> force a reset of the ESP8266 during the setup. This leaves it in a known
>> state before I start sending AT commands to it. I have now added code to
>> force a reset if 10 errors are seen in succession. This should address the
>> problem.
>> 
>> ------------------------------
>> 
>> Message: 5
>> Date: Sun, 07 Dec 2014 15:32:15 -0500
>> From: Ken McKinnon <klmckinnon at rogers.com>
>> To: lab at artengine.ca
>> Subject: Re: [Lab] [Bulk] Re:  ESP8266 issues and data logger
>> Message-ID: <5484B94F.6040206 at rogers.com>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>> 
>> Sounds like you need to add a watchdog function, something that sits outside
>> the main code that gets tweaked once in a while and if it doesn't it will
>> cause a reset.
>> 
>> https://www.youtube.com/watch?v=BDsu8YhYn8g
>> 
>> The Watchdog has a separate timer that ticks over at a set rate, if it
>> overflows, it will force a reset.  The working code within your cycle
>> periodically would have to clear the WDT thereby preventing it from an
>> unplanned reset.
>> 
>> It can also be done externally.
>> 
>> Ken
>> 
>> 
>> 
>> _______________________________________________
>> Lab mailing list
>> 1. subscribe http://artengine.ca/mailman/listinfo/lab
>> 2. then email Lab at artengine.ca to send your message to the list
> 
> _______________________________________________
> Lab mailing list
> 1. subscribe http://artengine.ca/mailman/listinfo/lab
> 2. then email Lab at artengine.ca to send your message to the list