only 1 AT command sends (ESP8266/Arduino Uno) - arduino

Question

I'm facing problem with sending AT Commands using Arduino Uno. I've written a small program (link below) to set up a server. I need to send data to Atmega from my laptop using Wifi module ESP8266. Everything would be fine if the entire program would do at once at the moment I need to comment and uncomment (adding and removing double slashes) every line of AT code, because only one AT command executes in a single compilation.
It seems like the program gets stuck somewhere in the while-loop (even on the module, I can see that blue diode stops blinking). I think that I've done something wrong in code and I would appreciate any help.
#include <SoftwareSerial.h>
SoftwareSerial espmod(2, 3);
void commands(String cmd, int waittime);
void setup(void) {
Serial.begin(9600);
espmod.begin(9600);
while (!Serial) {;}
commands("AT+GMR\r\n", 1000);
commands("AT+RST\r\n", 500);
commands("AT+CWMODE=1\r\n", 500);
commands("AT+CWJAP=\"SSID\",\"PASS\"\r\n", 4000);
commands("AT+CIPMUX=1\r\n", 500);
commands("AT+CIPSERVER=1,333\r\n", 500);
commands("AT+CIFSR\r\n", 500);
}
void loop() { // run over and over
}
void commands(String cmd, int waittime) {
espmod.print(cmd);
delay(waittime);
while(espmod.available()) {
char val = espmod.read();
Serial.write(val);
}
}
Here's the screen:
Version:
AT Version: 0.21.0.0
SDK Version: 0.9.5
Connections:
ESP
VCC -- 3,3 V (external source)
GND -- GND -- Arduino GND
RX -- TX (Arduino pin 3)
TX -- RX (Arduino pin 2)
CH_PD -- 3,3 V
RST -- 3,3 V
EDIT:
I've been fighting with this for couple of days, still without solution, but today it worked finally, but only once (after reseting power supply it's still the same) ! I could've seen all commands doing on SerialMonitor, so there is everything fine with code and i guess there is something wrong with esp module. As far as i can get only one AT command sent and executed in a single compilation, is it possible that 0,5 A current i provide to the module is not enough? Can module be out of the memory ? Is there any way to see SoftwareSerial monitor (is there anything like that)?

Answer 1

There is an unnecessary loop in command function. Let the arduino handle the loop for you. Also it is better to try with different delay parameters, maybe you can decrease some. Here the code I offer :
void loop() {
while (espmod.available()){
String result = espmod.readStringUntil('\n');
Serial.println("AT result : " + result);
}
}
void commands(String cmd, int waittime) {
espmod.print(cmd);
delay(waittime);
}