#define TRIG_PIN 10
#define ECHO_PIN 9
#define BUZZ_PIN 8
void setup() {
Serial.begin(9600);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
digitalWrite(TRIG_PIN, LOW);
}
void loop() {
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(20);
digitalWrite(TRIG_PIN, LOW);
unsigned long tempo = pulseIn(ECHO_PIN, HIGH);
float distanza = 0.03438 * tempo / 2;
Serial.println("distanza: " + String(distanza) + "cm");
delay(20);
;if(String‹(30)+"cm")
;else digitalWrite(BUZZ_PIN, HIGH)
;if(String›(30)+"cm")
;else digitalWrite(BUZZ_PIN, LOW)
;}
/home/builder/opt/arduino-builder/arduino-builder -compile -core-api-version 10611 -hardware /home/builder/opt/arduino-builder/hardware -hardware /home/builder/.arduino15/packages -tools /home/builder/opt/arduino-builder/tools -tools /home/builder/.arduino15/packages -built-in-libraries /home/builder/opt/libraries/latest -logger humantags -fqbn arduino:avr:uno -build-cache /tmp -build-path /tmp/366925234/build -verbose -prefs runtime.tools.arduino101load.path=/home/builder/.arduino15/packages/Intel/tools/arduino101load/2.0.1 -prefs runtime.tools.dfu-util.path=/home/builder/.arduino15/packages/arduino/tools/dfu-util/0.9.0-arduino1 -prefs runtime.tools.avrdude.path=/home/builder/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino14 -prefs runtime.tools.sketchUploader.path=/home/builder/.arduino15/packages/Intel/tools/sketchUploader/1.6.2+1.0 -prefs runtime.tools.arc-elf32.path=/home/builder/.arduino15/packages/Intel/tools/arc-elf32/1.6.9+1.0.1 -prefs runtime.tools.linuxuploader.path=/home/builder/.arduino15/packages/arduino/tools/linuxuploader/1.5.1 -prefs runtime.tools.arm-linux-gcc.path=/home/builder/.arduino15/packages/arduino/tools/arm-linux-gcc/4.9.3 -prefs runtime.tools.x86-linux-gcc.path=/home/builder/.arduino15/packages/arduino/tools/x86-linux-gcc/7.2.0 -prefs runtime.tools.avr-gcc.path=/home/builder/.arduino15/packages/arduino/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs runtime.tools.openocd.path=/home/builder/.arduino15/packages/arduino/tools/openocd/0.10.0-arduino7 -prefs runtime.tools.arm-none-eabi-gcc.path=/home/builder/.arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4 -prefs runtime.tools.bossac.path=/home/builder/.arduino15/packages/arduino/tools/bossac/1.7.0 -prefs runtime.tools.arduinoOTA.path=/home/builder/.arduino15/packages/arduino/tools/arduinoOTA/1.2.1 -prefs runtime.tools.flashpack.path=/home/builder/.arduino15/packages/Intel/tools/flashpack/2.0.0 -prefs runtime.tools.mkspiffs.path=/home/builder/.arduino15/packages/esp8266/tools/mkspiffs/2.5.0-3-20ed2b9 -prefs runtime.tools.esptool.path=/home/builder/.arduino15/packages/esp8266/tools/esptool/2.5.0-3-20ed2b9 -prefs runtime.tools.xtensa-lx106-elf-gcc.path=/home/builder/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-3-20ed2b9 -prefs runtime.tools.CMSIS.path=/home/builder/.arduino15/packages/arduino/tools/CMSIS/4.5.0 -prefs runtime.tools.nrf5x-cl-tools.path=/home/builder/.arduino15/packages/arduino/tools/nrf5x-cl-tools/9.3.1 -prefs runtime.tools.CMSIS-Atmel.path=/home/builder/.arduino15/packages/arduino/tools/CMSIS-Atmel/1.2.0 -prefs runtime.tools.i586-poky-linux-uclibc.path=/home/builder/.arduino15/packages/Intel/tools/i586-poky-linux-uclibc/1.6.2+1.0 -prefs runtime.tools.core2-32-poky-linux.path=/home/builder/.arduino15/packages/Intel/tools/core2-32-poky-linux/1.6.2+1.0 -libraries /tmp/366925234/custom -libraries /tmp/366925234/pinned /tmp/366925234/sketch_jan26a
Compiling sketch...
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:24:3: error: stray '\342' in program
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:24:3: error: stray '\200' in program
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:24:3: error: stray '\271' in program
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:26:3: error: stray '\342' in program
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:26:3: error: stray '\200' in program
/tmp/366925234/sketch_jan26a/sketch_jan26a.ino:26:3: error: stray '\272' in program
exit status 1
i want to do a sketch to do an alarm with the distnce sensor "HC-SR04" and un buzzer...but what are all this errors?i'm new on arduino.