使用android控制伺服 [英] control servo using android

问题描述

问问题大师，如何在arduino中编码以通过蓝牙使用android控制伺服器?以下代码无效，伺服系统只能在48-56之间运行.

Asked question master, how to coding in arduino for controlling servo using android via bluetooth? Code below does not work, servo only runs between 48 - 56.

#include <SoftwareSerial.h> #include <SoftwareSerial.h> #include <Servo.h> Servo servo; int bluetoothTx = 10; int bluetoothRx = 11; SoftwareSerial bluetooth(bluetoothTx, bluetoothRx); void setup() {   servo.attach(9);
 Serial.begin(9600); bluetooth.begin(9600);} void loop() {
//read from bluetooth and wrtite to usb serial
if(bluetooth.available()> 0 ){    int servopos = bluetooth.read();
Serial.println(servopos);
servo.write(servopos);}} 

推荐答案

1. 使用以下命令以字符串形式读取数据:string input = bluetooth.readString();
2. 然后使用int servopos = int(input);
将字符串转换为int
3. 然后将位置写入伺服器:servo.write(servopos);

1. Read the data as string using: string input = bluetooth.readString();
2. Then convert string to int using: int servopos = int(input);
3. Then write the position to the servo:servo.write(servopos);

现在，根据您从android发送的数据，您可能需要:
修剪:input = input.trim();
或限制它:servopos = constrain(servopos,0,180);

Now depending on the data you send from android, you could need to :
Trim it: input = input.trim();
Or constrain it : servopos = constrain(servopos,0,180);

您更正的代码:

#include <SoftwareSerial.h>
#include <Servo.h>
Servo servo;
int bluetoothTx = 10;
int bluetoothRx = 11;
SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
void setup() {
  servo.attach(9);
  Serial.begin(9600);
  bluetooth.begin(9600);
} 

void loop() {
  //read from bluetooth and wrtite to usb serial
  if (bluetooth.available() > 0 ) {
    String s = bluetooth.readString();
    s.trim();
    float servopos = s.toFloat();
    servopos = constrain(servopos, 0, 180);
    Serial.println("Angle: "+String(servopos));
    servo.write(servopos);
  }
}

这篇关于使用android控制伺服的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！