esp8266/Arduino

Arduino IDE for ESP8266

Me No Dev

@me-no-dev

I have :D

Douglas Pearless

@DouglasPearless

Ah Ha, I figured you of all possible people might have :-)

I like the look of the library and have been scratching my head after reading as many examples as I could find; would you have an example you could share?

Me No Dev

@me-no-dev

what do you want to achieve?

Douglas Pearless

@DouglasPearless

I want to convert my sketch to use your async buffering library to solve a problem where the block TCP libraries that come with ESP8266/Arduino are causing me to lose characters; this is to add a telnet WiFi connection to Smoothie and other 3D printers / lasercutters

(I have spend a lot of hours tracing the problem down to the TCP end of the equation)

brutzler

@brutzler

let me hook up:
what is the advantage of a async-TCP-connection?

Me No Dev

@me-no-dev

why buffering?

@brutzler it does not hold the loop

@DouglasPearless there is an example for Async telnet in github

i think...

if you are going to push the telnet to the serial, you do not need to buffer

Douglas Pearless

@DouglasPearless

I have LaserWeb send data to the Smoothie via a telnet connection via an ESP8266; the replies lose characters etc. By logging to Serial1 I can see the data flowing to the Smoothie UART and back to the ESP8266 but sometimes not all the characters get back over WiFi to LaswerWeb

I did not see an Async telnet example, I will check again, just a moment

Nope, cannot see one at https://github.com/me-no-dev/ESPAsyncTCP

Me No Dev

@me-no-dev

not there... let me look

Douglas Pearless

@DouglasPearless

ok, thanks

Me No Dev

@me-no-dev

https://gist.github.com/me-no-dev/116e417ea6a3bbc98b08

here is an old example you can look at

Douglas Pearless

@DouglasPearless

cool

Is that a complete sketch as I get "'AsyncClient' has not been declared"

Me No Dev

@me-no-dev

missing the include it seems

Douglas Pearless

@DouglasPearless

:-)

Douglas Pearless

@DouglasPearless

I added the following includes and it now compiles:

include <ESPAsyncTCPbuffer.h>

include <ESP8266WiFi.h>

include <ArduinoOTA.h>

Me No Dev

@me-no-dev

you need ESPAsyncTCP not the buffer

Douglas Pearless

@DouglasPearless

oops, that wasn't supposed to be so big, I guess the "#" is some kind of markup

Me No Dev

@me-no-dev

yeah...

read on github markup :)

Douglas Pearless

@DouglasPearless

Interesting, if I remove that include I get:
AsyncTelnetServer:28: error: 'AsyncClient' has not been declared
void onPoll(void obj, AsyncClient c){

and a lot of other erro

Me No Dev

@me-no-dev

#include <ESPAsyncTCP.h>

Douglas Pearless

@DouglasPearless

your sketch requires either:
ESPAsyncTCP.h
or
ESPAsyncTCPbuffer.h
in order to compile

Me No Dev

@me-no-dev

do not remove it... use the non-buffer one

Douglas Pearless

@DouglasPearless

Ah, ok

now using the non buffer one; going to try in a minute; compiling and uploading now :-)

Douglas Pearless

@DouglasPearless

A couple of quick questions, where does os_printf send its output, can I get it to write to Serial1 ?

or does that actually go to the UART0 which I think it does

Douglas Pearless

@DouglasPearless

I will need to sit down and better understand how this works as I seen to be getting strange data back; it seems to be chopping lines (Strings) up ie. send "X250.80 S0.1516"
expecting back an
"ok"
but Smoothie replies:
"error: unsupported command - X:124"
so it appears something is going wrong send data across the ESP to Smoothies UART :-(

Me No Dev

@me-no-dev

well check the code :) probably sending new lines somwhere

I gave you an example, not a eworking code for your need

Douglas Pearless

@DouglasPearless

I am reading the code right now, I appreciate the example, certainly something to work on :-)

Me No Dev

@me-no-dev

so this part actually sets os_printf:

void _u0_putc(char c){
  while(((U0S >> USTXC) & 0x7F) == 0x7F);
  U0F = c;
}
void setup(){
  Serial.begin(115200);
  ets_install_putc1((void *) &_u0_putc);
  system_set_os_print(1);
}

void _u1_putc(char c){
  while(((U1S >> USTXC) & 0x7F) == 0x7F);
  U1F = c;
}
void setup(){
  Serial1.begin(115200);
  ets_install_putc1((void *) &_u1_putc);
  system_set_os_print(1);
}

Douglas Pearless

@DouglasPearless

Ah Ha, Serial is on UART0 and the 1 = UART1 I assume? and there

Me No Dev

@me-no-dev

here it is for serial1

Douglas Pearless

@DouglasPearless

great, is it set at 115200 as well or that odd 74800 rate?

Me No Dev

@me-no-dev

read the code again ;) it's calling Serial.begin

Douglas Pearless

@DouglasPearless

oops, staring me in the face, clearly not enough coffee today

Clemens Kirchgatterer

@everslick

I tried the AsyncWebserver approx. a year ago, but i ran into out of heap issues back then. are the requirements on RAM still the same?

because you mentioned buffered/non buffered implementation.

Me No Dev

@me-no-dev

@everslick if you are handling 5 connections at the same time, there are resources allocated for all 5 :)

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include <ESPAsyncTCPbuffer.h>

include <ESP8266WiFi.h>

include <ArduinoOTA.h>