example code for Arduino Uno to connect ST-001

#include <SoftwareSerial.h>

SoftwareSerial softSerial(8, 9); // Connect 8 to TX from ST-001, and GND - GND
String inputSoftSerial = "";      
String inputSerial = "";         

void setup() {
  Serial.begin(115200);         
  softSerial.begin(115200);     
  pinMode(13, OUTPUT);          // built in LED
}

void loop() {
  while (softSerial.available()) {
    char inChar = (char)softSerial.read();
    inputSoftSerial += inChar;
    if (inChar == '\n') {
      handleInput(inputSoftSerial, "SoftSerial");
      inputSoftSerial = "";
    }
  }

  while (Serial.available()) {
    char inChar = (char)Serial.read();
    inputSerial += inChar;
    if (inChar == '\n') {
      handleInput(inputSerial, "Serial");
      inputSerial = "";
    }
  }
}

void handleInput(String data, String source) {
  data.trim(); 
  Serial.println("[" + source + "] received: " + data);
  if (data.indexOf("value:200") >= 0) {
    blinkLED(2);
  } else if (data.indexOf("value:100") >= 0) {
    blinkLED(1);
  }
}

void blinkLED(int times) {
  for (int i = 0; i < times; i++) {
    digitalWrite(13, HIGH);
    delay(200);
    digitalWrite(13, LOW);
    delay(200);
  }
}