ESP8266 Community Forum

- Fri Oct 21, 2016 7:41 pm #56932 help me, What changed if you want to make esp-01 as client?
I have learned and no found reference.

Code: Select all#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <Servo.h>

const char *ssid = "mywifi"; 
const char *pw = "qwerty123";
IPAddress ip(192, 168, 0, 1);
IPAddress netmask(255, 255, 255, 0);
const int port = 9876;

const int chCount = 4;
Servo servoCh[chCount];
int chPin[] = {0, 2, 14, 12};
int chVal[] = {1500, 1500, 1500, 1500};

int usMin = 700;
int usMax = 2300;


WiFiServer server(port);
WiFiClient client;


char cmd[100];
int cmdIndex;
unsigned long lastCmdTime = 60000;
unsigned long aliveSentTime = 0;


boolean cmdStartsWith(const char *st) {
  for(int i=0; ; i++) {
    if(st[i]==0) return true;
    if(cmd[i]==0) return false;
    if(cmd[i]!=st[i]) return false;;
  }
  return false;
}


void exeCmd() {

  lastCmdTime = millis();
 
  if( cmdStartsWith("ch") ) {
    int ch = cmd[2] - '0';
    if(ch>=0 && ch<=9 && cmd[3]==' ') {
      chVal[ch] = (int)atof(cmd+4);
      if(!servoCh[ch].attached()) {
        servoCh[ch].attach(chPin[ch], usMin, usMax);
      }   
      servoCh[ch].writeMicroseconds(chVal[ch]);
    }
  }
 
  if( cmdStartsWith("ci") ) {
    int ch = cmd[2] - '0';
    if(ch>=0 && ch<=9 && cmd[3]==' ') {
      chVal[ch] = -(int)atof(cmd+4);
      if(!servoCh[ch].attached()) {
        servoCh[ch].attach(chPin[ch], usMin, usMax);
      }   
      servoCh[ch].writeMicroseconds(chVal[ch]);
    }
  }
 
  if( cmdStartsWith("ca") ) {
    int ch = cmd[2] - '0';
    if(ch>=0 && ch<=9 && cmd[3]==' ') {
      chVal[ch] = (usMax+usMin)/2 + (int)( atof(cmd+4)*51 );
      if(!servoCh[ch].attached()) {
        servoCh[ch].attach(chPin[ch], usMin, usMax);
      }   
      servoCh[ch].writeMicroseconds(chVal[ch]);
    }
  }
 
  if( cmdStartsWith("cb") ) {
    int ch = cmd[2] - '0';
    if(ch>=0 && ch<=9 && cmd[3]==' ') {
      chVal[ch] = (usMax+usMin)/2 - (int)( atof(cmd+4)*51 );
      if(!servoCh[ch].attached()) {
        servoCh[ch].attach(chPin[ch], usMin, usMax);
      }   
      servoCh[ch].writeMicroseconds(chVal[ch]);
    }
  } 
}

void setup() {

  delay(1000);

  /*for(int i=0; i<chCount; i++) {
    servoCh[i].attach(chPin[i], usMin, usMax);
    chVal[i] = (usMin + usMax)/2;
    servoCh[i].writeMicroseconds( chVal[i] );
  }*/
 
  cmdIndex = 0;
  Serial.begin(115200);

  WiFi.softAPConfig(ip, ip, netmask);
  WiFi.softAP(ssid, pw);

  server.begin();

  Serial.println("ESP8266 RC receiver 1.1 powered by RoboRemo");
  Serial.println((String)"SSID: " + ssid + "  PASS: " + pw);
  Serial.println((String)"RoboRemo app must connect to " + ip.toString() + ":" + port);
 
}

void loop() {
  if(millis() - lastCmdTime > 500) { 
    for(int i=0; i<chCount; i++) {
      servoCh[i].writeMicroseconds( (usMin + usMax)/2 );
      servoCh[i].detach();
    }
  }

  if(!client.connected()) {
    client = server.available();
    return;
  }

  if(client.available()) {
    char c = (char)client.read();

    if(c=='\n') {       
      cmd[cmdIndex] = 0;
      exeCmd(); 
      cmdIndex = 0;
    } else {     
      cmd[cmdIndex] = c;
      if(cmdIndex<99) cmdIndex++;
    }
  }

  if(millis() - aliveSentTime > 500) {
    client.write("alive 1\n");
    aliveSentTime = millis();
  }

}