Comments for HIVE-RD BLOGHIVE-RD BLOG

Comment on Arduino Knock Lock not working properly by Joe

Joe — Thu, 16 Apr 2020 17:49:43 +0000

Hey, thank you for putting this up. I couldn’t get piezo to register anything at all and i couldn’t find where the code was wrong. I pasted yours in and kept comparing with mine until I found the extra = sign somewhere. Thanks for the help!

Comment on Arduino and DHT11 output to LCD module by Claudio

Claudio — Tue, 17 Mar 2020 14:14:49 +0000

Try a different DHT….like the 22,for negative readings.

Comment on Arduino and DHT11 output to LCD module by Claudio

Claudio — Tue, 17 Mar 2020 14:03:06 +0000

The DHT11 only senses values of temperature within the range of 0-50 degrees celcius

Comment on Arduino and DHT11 output to LCD module by Subash Kumar Yadav

Subash Kumar Yadav — Wed, 12 Feb 2020 12:15:03 +0000

How can i solve the compile error for arduino………………………..

Comment on Arduino and DHT11 output to LCD module by sravya

sravya — Mon, 02 Dec 2019 12:57:38 +0000

What is the difference between Arduino and micro controller, I interfaced Arduino to LCD only 4 data lines, rs, enable but 8051 micro controller I connected all the data lines to 8051 port what is the difference b/w both controllers ??
http://bigbelectronics.in/product.php?product=20×4-line-lcd-display-blue-backlight-hd44780-all-arduino-rasp-pi-avr-arm-8051

Comment on Arduino and DHT11 output to LCD module by Anonymous

Anonymous — Thu, 26 Sep 2019 20:52:07 +0000

delete dht_u

Comment on Arduino and DHT11 output to LCD module by satya

satya — Thu, 19 Sep 2019 12:53:40 +0000

#include
#include

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int greenPin = A0;
dht sensor;

void setup()
{
lcd.begin(16,2); //16 by 2 character display
}

void loop()
{
delay(1000); //wait a sec (recommended for DHT11)
sensor.read11(greenPin);
lcd.clear();
lcd.setCursor(0,0);
lcd.print(“Humidity = “);
lcd.print(sensor.humidity);
lcd.setCursor(0,1);
lcd.print(“Temp = “);
lcd.print(sensor.temperature);
}

can i use the same code and connections for the display 20×4-line-lcd-display

Comment on Arduino Knock Lock not working properly by Kris

Kris — Thu, 19 Sep 2019 01:37:19 +0000

Forgot to mention, I just built the circuit on the breadboard, rather than attaching the piezo directly to anything. The upshot of that is you need to make sure the breadboard isn’t moving around, and then produce a defined tap on the piezo, probably with something metallic or rigid plastic. For me, tapping it with tweezers worked, but not my finger for instance.

Comment on Arduino Knock Lock not working properly by Kris

Kris — Thu, 19 Sep 2019 01:33:45 +0000

Thanks, the key for me was in adding a delay after incrementing numberOfKnocks:

if (checkForKnocks(knockVal) == true) { // Validate the vibration as knocks with a custom function.
numberOfKnocks++; // if they’re valid knocks, then increment the knockCounter.
delay(200); // This was key to reducing in the noise and making it detect knocks
}

I ended up using these for the knock detection thresholds:
int quietKnock = 150;
int loudKnock = 5500;

Comment on Arduino and DHT11 output to LCD module by Keith Bouckley

Keith Bouckley — Sun, 11 Aug 2019 00:42:16 +0000

try changing
from/home/brucez/Arduino/libraries/DHT_sensor_library/DHT_U.h:2
To
#include dht11();

Keith