Arduino Due with ESP8266 simple AT command -

i have arduino due , want connect esp8266 board , test connection simple "at" command on serial command line. have written lot on internet there many different answers on topic , none of them solves issue directly.

i set eps8266 correctly 2 power cables. comming different power sources, there should not problem power esp board.

i think problems somewhere in different baud rates. if choose 9600 baud connection arduino pc via usb , 74880 connection esp board due @ least error messages correctly when esp board has restart (when force it).

ets jan 8 2013,rst cause:1, boot mode:(3,6)

load 0x40100000, len 1396, room 16
tail 4 chksum 0x89 load 0x3ffe8000, len 776, room 4
tail 4 chksum 0xe8 load 0x3ffe8308, len 540, room 4
tail 8 chksum 0xc0 csum 0xc0

2nd boot version : 1.4(b1)
spi speed : 40mhz
spi mod
le:52mn

the code following:

//always high int ch_pd_8266 = 53;  void setup() {   serial.begin(9600);   serial3.begin(74880); //--> @ least error code shwon correctly  //  serial3.begin(115200); //error code gibberish   pinmode(ch_pd_8266, output);   digitalwrite(ch_pd_8266, high); }  void loop() {   while (serial.available() > 0) {     char = serial.read();     serial3.write(a);      //write see if comes perfect     //serial.write(a);   }  }  void serialevent3() {   while (serial3.available() > 0) {     char = serial3.read();    // serial.write('a');     serial.write(a);   } } 

any appreciated.

that isn't error. it's boot message.

the @ firmware using different baud rate, bootloader.
should try different baud rates , test simple at command.
when find right baud rate, boot message garbage, @ commands work.