esp8266/Arduino

Arduino IDE for ESP8266

Michael Miller

@Makuna

@bertmelis What is the signature of your println function? Where are you calling this from?
The progmem are global, the __c is static and defined within a scope making them global and unique.
Did you search for section type conflict error?

Bert Melis

@bertmelis

It is called from within a library I created. I'll try to reproduce in a simple example.

(library = class + )

Bert Melis

@bertmelis

I can't reproduce using a simple example (maybe it's too simple, but I don't know where my error comes from). My real life example is residing in https://github.com/bertmelis/VitoWifi. I can't put any PROGMEM debug messages in Optolink.cpp inside the inline checksum methods.

Bert Melis

@bertmelis

for example: adding _debugPrinter->println(F("just checking"));to https://github.com/bertmelis/VitoWifi/blob/develop/src/Optolink.cpp#L421 generates the error.

(you may find the lib written badly, but I'm only auto-didacting since a couple of months)

Lars Englund

@larsenglund

Hmm, I'm getting this stackdump:
https://pasteboard.co/g2nmn9aYz.png

Should I dig for the problem in ESP8266mDNS.cpp?

(line 261 contains the closing bracket for the addServiceTxt method so I'm guessing the line numbers are incorrect or refering to some other file?)

Lars Englund

@larsenglund

The code for sending out querys has worked fine before so I'm thinking something in my network might cause it?

Myles Eftos

@madpilot

I found wireshark pretty handy for debugging this stuff as mDNS packets are broadcast. You might find a massive packet is locking up the parsing and causing the watchdog to trigger. What CPU speed have you set?

Lars Englund

@larsenglund

160mhz

Lars Englund

@larsenglund

Hmm, after some debugging in ESP8266mDNS.cpp::_parsePacket() I found that it enters an infinite loop trying to add a new answer to answer list (around line 644)

It adds the three first answers to the list without any problem but when the fourth is parsed and ready to be added while (answer->next != 0) { never exits..

Could answer->next have been corruptedhow?

Since every new answer gets intialized to answer->next = 0;...

Myles Eftos

@madpilot

Could be a bad packet that is causing a buffer overflow, stopping the traversal from terminating. Hard to say with out looking at the packet

Lars Englund

@larsenglund

Reading answers RX: REQ, ID:0, Q:0, A:4, NS:0, ADD:0
 4 5f 65 73 70 
found matching service: esp
 4 5f 74 63 70 
 5 6c 6f 63 61 6c 
type: 000c rdlength: 28
0a 65 73 70 5f 44 41 33 35 45 41 04 5f 65 73 70 04 5f 74 63 70 05 6c 6f 63 61 6c 00 
 10 65 73 70 5f 44 41 33 35 45 41 
 4 5f 65 73 70 
found matching service: esp
 4 5f 74 63 70 
 5 6c 6f 63 61 6c 
type: 0010 rdlength: 0

 10 65 73 70 5f 44 41 33 35 45 41 
 4 5f 65 73 70 
found matching service: esp
 4 5f 74 63 70 
 5 6c 6f 63 61 6c 
type: 0021 rdlength: 24
 10 65 73 70 5f 64 61 33 35 65 61 
esp_da35ea
 10 65 73 70 5f 64 61 33 35 65 61 
 5 6c 6f 63 61 6c 
type: 0001 rdlength: 4
All answers parsed, adding to _answers list..
else

It's after this packet the loop starts so it does not look like a buffer overflow

Also I have checked that I have lots of heap space left (>28K)

Lars Englund

@larsenglund

I see now that the problem occurs when _parsePacket has returned after parsing the first three packets and is then called again in MDNSResponder::update() and continues to add a fourth answer to the same answer list.. if that has any significance.. also the next-pointer of the last element in the answer list has changed from 0 to pointing to the last item itself when entering parsePacket the second time (thus causing the infinite loop)

Boggle.. what could be causing the next-pointer to be overwritten between two calls to _parsePacket

Lars Englund

@larsenglund

https://gist.github.com/larsenglund/742394f7157bb3ebd38e2aa3721da0a4

I've pasted a sample serial output and the parsePacket that generates it there

Lars Englund

@larsenglund

Crap, It has already been fixed esp8266/Arduino#2347

I really need to switch to using the latest github code.. sorry for spamming with already answered questions..

Lars Englund

@larsenglund

Hmm, after following the instuctions to use the git version on https://github.com/esp8266/Arduino#using-git-version i get fatal error: SoftwareSerial.h: No such file or directory when compiling my code..

Lars Englund

@larsenglund

I added it manually from https://github.com/plerup/espsoftwareserial

an-erd

@an-erd

Is there a way to do a OTA update and do some stuff in the loop(), too.

OTA is working fine, the callback functions are called, but I didn't get it working to update the display which is called from the loop().

Me No Dev

@me-no-dev

with current version, no

if we move the TCP part to Async, then yes

an-erd

@an-erd

can I spend some time in the ArduinoOTA.onProgress() function to update the display?

Me No Dev

@me-no-dev

yes

not too much though

an-erd

@an-erd

Ok thanks, I'll try

an-erd

@an-erd

Works pretty good, the OLED display update does not cause any problems! Thanks

Myles Eftos

@madpilot

@me-no-dev Is using async something you are working on at the moment? As I was thinking of looking in to this.

Me No Dev

@me-no-dev

@madpilot my async libs are fine, if that is what you are asking, else I'm working on esp32

James

@WanaGo

Hello
Does anyone have any experience with doing UDP NTP Time stuff with the ESP8266?
I am using the PJRC time library, and based my sketch on the ESP8266 example.
I get the NTP server IP on startup, and it gets the EPOCH time no problem. But the next time to goes to sync (set for 5 minutes, but tried 30 minutes also), it fails.
I enabled the Debug, and I get the following:

connected with ROUTER, channel 11
ip:192.168.178.99,mask:255.255.255.0,gw:192.168.178.1
wifi evt: 0
wifi evt: 3
Connected - 192.168.178.99
Setting Up UDP
scandone
Transmit NTP Request
[hostByName] request IP for: pool.ntp.org
[hostByName] Host: pool.ntp.org IP: 202.6.116.123
pool.ntp.org: 202.6.116.123
Receive NTP Response

And then next time I get:

Transmit NTP Request
[hostByName] request IP for: pool.ntp.org
[hostByName] Host: pool.ntp.org lookup error: -5!
pool.ntp.org: 0.0.0.0

James

@WanaGo

tried DHCP, Static, defining DNS and not defining DNS, results are the same. I cant figure out what is going on.

it uses the exact same code the first attempt as with every other attempt

James

@WanaGo

esp8266/Arduino#3150

That looks to be the same thing

James

@WanaGo

WiFi.hostByName() seems to work once. So I have done this at setup() now, and then saved the IP address globally, and used that each time after that.

Something is wrong though, there is a bug somewhere.

James

@WanaGo

ok no that didnt work either.

James

@WanaGo

been using 2.3.0, tried 2.4.0rc1, same exact thing

Holger Lembke

@holgerlembke

Moin moin!

I try to get LiquidCrystal_I2C to run with es8266. i2cscan shows the pcf8574, but it does not work at all... any hints? any working github repo? thanks!

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