These are chat archives for esp8266/Arduino

10th
Nov 2017
Develo
@devyte
Nov 10 2017 03:04
@me-no-dev I think you're gonna get a kick out of this:
I monitor the esp repo by the email notifications, and it's been really quiet for something like a week now
It just occurred to me that my daughter almost always trolls me for my phone when I'm looking at emails or st the repo, so I checked the repo notifications settings.... and turns out they're on ignore -.-
Develo
@devyte
Nov 10 2017 03:10
My 2yo daughter turned off the repo notifications.... oh, and it was on purpose, I passed the phone to her with the repo webpage visible, and she immediately went up and turned them off in front of me o.O
Next step: teach her how to gi
Sigh I give up
Git*
brutzler
@brutzler
Nov 10 2017 06:08
Hi, wanted to make an ESP-Wifi-meat-thermometer. with something like a lance to sting into the meat. Has anybody a idea what sort of sensor I could use?
MOAMIndustries
@MOAMIndustries
Nov 10 2017 07:16
depending on the temperature ranges
maybe some sort of thermocouple
bobcroft
@bobcroft
Nov 10 2017 08:10
@brutzler , There are K type thermocouples specifically for that purpose and there are also thermocouple interfaces that use I2C. I have such an interface sold by 'Tautec' in the USA but I would think a Google search would turn up others.
Bert Melis
@bertmelis
Nov 10 2017 08:42
Question: I was changing a large portion of my code and after I was done, I saw a size increase of 20kB of my firmware .bin. Now I wondered it was because of bad code or it was because of the upgrade to lwip2
does everybode see this size increase after moving to lwip2?
oh wait, I can find out myself. I didn't notice the handy menu item in Arduino IDE (mostly working in Pio).
Bert Melis
@bertmelis
Nov 10 2017 09:19
so, assume makes an ass of u and me
firmware lwip size
old V2 404919
old esp 411095
new V2 404991
new esp 411167
And the idea with a I2C-thermocouple-interface sounds good. Already thought of K-Type or similiar, but was afraid how to connect them to an ESP directly?
bobcroft
@bobcroft
Nov 10 2017 12:21
@brutzler , There is no way to be sure what those probes are but they do not have the correct thermocouple plugs so they are more than likely thermistors. The other possibility is that they are Pt 100 probes. If they were thermistors and you could find the data on them then they would be easier to implement than J or K type thermocouples. I have never used Pt 100 probes. To some extent it depends on the temperature range you want to measure, thermocouples can go to very high temperatures. Thermistors are not linear in their output but a formula (Steinhart-Hart) can be used to linearize them. I think there is an Arduino library for using thermisters.
Thermocouples need cold junction compensation and the correct connecting plugs/cables otherwise parasitic junctions are formed.
brutzler
@brutzler
Nov 10 2017 12:30
@bobcroft I agree with you, that there is only an audio-plug and not the typical green NiCrNi-plugs. Therefore I am with you, that they are PT100.
brutzler
@brutzler
Nov 10 2017 12:38
No, its no PT100 (or PT1000). Just measured @ the probe of my meat-Thermometer ant I had a value of 15,54kOhm @67°C.
PTC/NTC???
bidyutper
@bidyutper
Nov 10 2017 12:39
Help need #WiFiManager issue #87.. keep trying reconnect after power failure..And ondemandPortal need only at bottom trigger..
brutzler
@brutzler
Nov 10 2017 16:25
OK, I will order some of this probs for my project and looking for a matching sheet of temp<->resistance. Or making my own with measuring.
But now its interesting, how to measure resistance with a ESP. I have a AS1115 breakout board. (ADC with I2C) Do you think this will work?
Shawn A
@tablatronix
Nov 10 2017 16:41
Is it possible to retreive
Is it possible
Luc
@luc-github
Nov 10 2017 16:57
Hi seems git is 2.4rc2 but staging is not updated for a while - any idea when the 2.4 release is planed ?
Develo
@devyte
Nov 10 2017 17:01
No date available for 2.4 yet. There is a (long) list of bugs and PRs that still need to be processed for the final 2.4.
Luc
@luc-github
Nov 10 2017 17:09
Ok Thank you - and any plan to update http://arduino.esp8266.com/staging/package_esp8266com_index.jsonwith 2.4rc2 ?
Shawn A
@tablatronix
Nov 10 2017 18:17
anyone know, if it Is possible to get max_tpw, is it stored in rf cal memory somewhere
Bert Melis
@bertmelis
Nov 10 2017 21:30
After testing with lwip2, I have to say: it is FAST! A bit too fast, as it is closing my (telnet) server faster than it could print the line to say it was going to close the connection. But I'm not complaining. :smile: