// defines pin numbers
const int trigPin = 2;
const int echoPin = 3;
const int buzzer = 4;
const int ledPin = 5;
// defines variables
long duration;
int distance;
int safetyDistance;
void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
pinMode(buzzer, OUTPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600); // Starts the serial communication
}
void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 microseconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance = duration * 0.0343 / 2;
safetyDistance = distance;
if (safetyDistance <= 14) {
digitalWrite(buzzer, HIGH);
digitalWrite(ledPin, HIGH);
} else {
digitalWrite(buzzer, LOW);
digitalWrite(ledPin, LOW);
}
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
}
The tx blnks because the factory loaded a blink sketch. If we can't see the verbose output of the compile in code tags, and some debug print output it is very difficult to help.
rdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Users\pleas\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM3
Using Programmer : jtag2updi
Overriding Baud Rate : 115200
JTAG ICE mkII sign-on message:
Communications protocol version: 1
M_MCU:
boot-loader FW version: 1
firmware version: 1.07
hardware version: 1
S_MCU:
boot-loader FW version: 1
firmware version: 6.07
hardware version: 1
Serial number: 00:00:00:00:00:00
Device ID: JTAGICE mkII
AVR Part : ATmega4809
Chip Erase delay : 0 us
PAGEL : P00
BS2 : P00
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 0
StabDelay : 0
CmdexeDelay : 0
SyncLoops : 0
ByteDelay : 0
PollIndex : 0
PollValue : 0x00
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
prodsig 0 0 0 0 no 61 61 0 0 0 0x00 0x00
fuses 0 0 0 0 no 9 0 0 0 0 0x00 0x00
fuse0 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse1 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse2 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse4 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse5 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse6 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse7 0 0 0 0 no 1 0 0 0 0 0x00 0x00
fuse8 0 0 0 0 no 1 0 0 0 0 0x00 0x00
lock 0 0 0 0 no 1 0 0 0 0 0x00 0x00
data 0 0 0 0 no 0 0 0 0 0 0x00 0x00
usersig 0 0 0 0 no 64 64 0 0 0 0x00 0x00
flash 0 0 0 0 no 49152 128 0 0 0 0x00 0x00
eeprom 0 0 0 0 no 256 64 0 0 0 0x00 0x00
Programmer Type : JTAGMKII_PDI
Description : JTAGv2 to UPDI bridge
M_MCU hardware version: 1
M_MCU firmware version: 1.07
S_MCU hardware version: 1
S_MCU firmware version: 6.07
Serial number: 00:00:00:00:00:00
Vtarget : 5.0 V
avrdude: jtagmkII_initialize(): Cannot locate "flash" and "boot" memories in description
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.27s
avrdude: Device signature = 0x1e9651 (probably m4809)
avrdude: erasing chip
avrdude: reading input file "C:\Users\pleas\AppData\Local\arduino\sketches\619370A176413873A8C321B735A3A4AB/smart_glasses.ino.hex"
avrdude: writing flash (4008 bytes):
Writing | ################################################## | 100% 2.99s
avrdude: 4008 bytes of flash written
avrdude: reading input file "0x01"
avrdude: writing fuse2 (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude: 1 bytes of fuse2 written
avrdude: reading input file "0xC9"
avrdude: writing fuse5 (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude: 1 bytes of fuse5 written
avrdude: reading input file "0x00"
avrdude: writing fuse8 (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude: 1 bytes of fuse8 written
avrdude done. Thank you.
My nano every blinks tx with no code,
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);
- You are sending text out every time loop( ) runs.
1 Like
You should add some specific casts, otherwise you have
int = long * float / int
Do you think there might be a problem with that?
im not really that good at coding so i wouldnt really understand
Before you try to write code, you need to understand number systems, number representation and how/if you can convert between them.
If pulsein really returns long, convert the long to float in the next statement then do that formula correctly all in float.
The blink sketch blinks the L-LED, not the TX LED.
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