Disabling interrupts on TX pin on Arduino Mega 2560 -

i'll start telling reference on function serialevent not documented arduino. https://www.arduino.cc/en/reference/serialevent

due lack of information i've misunderstood how function works. have arduino mega 2560 comes 4 serial inputs/outputs, , have own serialeventx function (where x = {'',1,2,3}).

i've communicated esp8266 module, sends , receives information once client connected it.

using serialevent1 (1 because it's connected rx1 , tx1) want serialevent1 called when data incoming, called whenever use serial1.write(msg), means when message being sent.

#define debug_esp8622 1 #include <esp8622.h> #include <string.h> #include "common.h" #include <stdlib.h> wifi esp = wifi(); //here serial1.begin(115200) happens void setup() {   serial.begin(9600); //first of serial debugging   serial.println("starting");    while(!esp.sreachable());   //works   serial.println("esp found");    while(!esp.ssetmode(1));    //works   serial.println("mode set client");    while(!esp.sconnect(wifissid,wifipassword));  //works   serial.println("connected");   serial.print("ip:");   serial.println(esp.getip());    while(!esp.sstartserver(80));  //works   serial.println("server started"); } void loop() {     if(serial.available()>0){             int inbyte=serial.read();             /*here whenever call serial1.write(inbyte)               serialevent1 called @ end of loop               don't want             */             serial1.write(inbyte);     }  } void serialevent(){     return; } void serialevent1(){    serial.println("write or read event?");    while(serial1.available()>0){       int inbyte=serial1.read();       //serial.write(inbyte);    }    //esp.onserialevent(); //stores message , parses it, not relevant    return; } 

so now, knowing arduino libraries based on avr libc libraries, suppose rx1 , tx1 interrupts inside microcontroller binded both serialevent1 through arduino libraries.

is possible unbind tx1 serialevent1 using library , still using arduino libraries (serial1.write()/read())?

i use easiest way upload code mega using makefile. opted use arduino command line because suited needs far, know avrdude , avr-gcc more complete or better way compile/upload command line, correct me if i'm wrong.

cc=arduino upload: terminal.ino     $(cc) terminal.ino --upload  verify: terminal.ino     $(cc) terminal.ino --verify 

should start learning how use avrdude , avr-gcc instead if start using ? (or maybe has nothing fact of using avr libraries)

and last, i'm using above makefile usb cable, if use avrdude , avr-gcc through icsp or can still used through usb cable? erese bootloader?

many thanks

yes, serialevent functions silly. no different polling them in loop. can still lose data if time-consuming , don't return loop enough. solution attach rx interrupt, isn't supported built-in class, hardwareserial.

i have posted modified versions of hardwareserial allow attach rx interrupt. called neohwserial.

because replacement, must use neoserial[#] variables. can't use serial , neoserial1 in same sketch. use neoserial instead of serial, though don't call neoserial.attachinterrupt:

void setup() {   neoserial.begin( 9600 );            // replaces `serial.begin(9600)`   neoserial.println( f("started.") ); // ... , prints,    neoserial1.attachinterrupt( myrxfunction );   neoserial1.begin( 9600 ); 

remember myrxfunction called during interrupt. must quick handling each character, , don't call things depend on not being in interrupt, print or millis(). bad juju!

and sure files in matching ide version subdirectory (e.g., 1.6.5r2) copied libraries/neohwserial subdirectory. do not put them in libraries/1.0.5 or libraries/1.6.5r2