ESP8266 Community Forum

- Sun Mar 19, 2017 11:42 am #63948 I'm following the instructables guide Wi-Servo: Wi-fi Browser Controlled Servomotors (with Arduino + ESP8266) by IgorF2. My serial monitor always reads something like this;
AT+RST


OK
WIFI DISCONNECT

ets J`n 8 2013,sst cause:2, boot mode:(3,6)

load 0x40100000,6tail 0
chkstm 0x63
lo`d 0x3ffe8ntail 0
chk01 tail 0u9s 4 M
rŒãœï“pƒŒóŒ
Ai-Thin­Y.¢U�¡¹½±½�å�½¹bÑ‘¹j

¹eady
AR¥¨UêŠTTŠj
CèjµDøWHFI CONNECTED
AT+¨•©PÕ²Õ*ªÊ²’Â’bj�á:å]‘å
Ù‘åk
WIFI DISCÊʪÔ(UHø
AT+CIF*ªCC¡¥¨RÔ*)§*U%A±ŠÊ’rŠ²Âr‚r¢Âj
+CIFSR:STALAC,"5c:cf:7g:8e:92:66PÕ¥Ô
ÕªÕŠe
Cèj¥HøAT+CIPSERVDR=1,80


OK

I've tried several Baud rates, this only works on 115200, and the others just return gibberish. Also when I do get an IP and try it in my browser the servo does nothing. If anyone can help me out that'd be great!

The Arduino code:

// Wi-Servo v1.0 By Igor Fonseca Albuquerque

//include libraries
#include <SoftwareSerial.h>
#include <Servo.h>

SoftwareSerial esp8266(5, 4); //set ESP8266 RX pin = 5, and TX pin = 4

//define variables
#define DEBUG true //display ESP8266 messages on Serial Monitor
#define SERV1 9 //servo 1 on digital port 9
#define SERV2 10 //servo 2 on digital port 10

Servo s1; //servo 1
Servo s2; //servo 2
int pos1 = 170; //servo 1 current position
int pos2 = 170; //servo 2 current position
int vel = 10; //servos' speed (100 -> 90º in 1 s)(1 -> 90º in 9 s)
int pos1min = 20; //servo 1 minimum position
int pos2min = 20; //servo 2 minimum position
int pos1max = 160; //servo 1 maximum position
int pos2max = 160; //servo 2 maximum position


//**************
// Arduino Setup
//**************
void setup()
{

//attach and set servos' angles
s1.attach(SERV1);
s2.attach(SERV2);
s1.write(pos1max);
s2.write(pos2max);
//detach servos
s1.detach();
s2.detach();

//start serial communication
Serial.begin(115200);
esp8266.begin(115200);

sendData("AT+RST\r\n", 2000, DEBUG); //reset module
sendData("AT+CWMODE=1\r\n", 1000, DEBUG); //set station mode
sendData("AT+CWJAP=\"VM9596282\",\"mc8gyWdyCvd9\"\r\n", 2000, DEBUG); //connect wifi network
while(!esp8266.find("OK")) { //wait for connection
}
sendData("AT+CIFSR\r\n", 1000, DEBUG); //show IP address
sendData("AT+CIPMUX=1\r\n", 1000, DEBUG); //allow multiple connections
sendData("AT+CIPSERVER=1,80\r\n", 1000, DEBUG); // start web server on port 80
}

//**********
// Main Loop
//**********
void loop()
{
if (esp8266.available()) //check if there is data available on ESP8266
{
if (esp8266.find("+IPD,")) //if there is a new command
{
String msg;
esp8266.find("?"); //run cursor until command is found
msg = esp8266.readStringUntil(' '); //read the message
String command = msg.substring(0, 3); //command is informed in the first 3 characters. "sr1" = command to servo #1 and "sr2" = command to servo #2
String valueStr = msg.substring(4); //next 3 characters inform the desired angle
int value = valueStr.toInt(); //convert to integer
if (DEBUG) {
Serial.println(command);
Serial.println(value);
}
delay(100);

//************
// move servos
//************

//move servo1 to desired angle
if(command == "sr1") {
//limit input angle
if (value >= pos1max) {
value = pos1max;
}
if (value <= pos1min) {
value = pos1min;
}
s1.attach(SERV1); //attach servo
while(pos1 != value) {
if (pos1 > value) {
pos1 -= 1;
s1.write(pos1);
delay(100/vel);
}
if (pos1 < value) {
pos1 += 1;
s1.write(pos1);
delay(100/vel);
}
}
s1.detach(); //dettach
}

//move servo2 to desired angle
if(command == "sr2") {
//limit input angle
if (value >= pos2max) {
value = pos2max;
}
if (value <= pos2min) {
value = pos2min;
}
s2.attach(SERV2);
while(pos2 != value) {
if (pos2 > value) {
pos2 -= 1;
s2.write(pos2);
delay(100/vel);
}
if (pos2 < value) {
pos2 += 1;
s2.write(pos2);
delay(100/vel);
}
}
s2.detach();
}
}
}
}


//********************
// Auxiliary functions
//********************

//send data to ESP8266
String sendData(String command, const int timeout, boolean debug)
{
String response = "";
esp8266.print(command);
long int time = millis();
while ( (time + timeout) > millis())
{
while (esp8266.available())
{
char c = esp8266.read();
response += c;
}
}
if (debug)
{
Serial.print(response);
}
return response;
}