PIC Lesson: Sensor DHT
Sensor DHT11 adalah sensor yang dapat mengesan humidity dan suhu. Di atas adalah gambar sensor DHT11 dari DFRobot.
Specification:
- Operating Humidity Range = 20 to 90% RH
- Operating Temperature Range = 0 to 50°C
- Humidity Response Time = 6 to 15s
- Temperature Response Time = 6 to 30s
Sensor DHT11 menggunakan 1-wire protocol. DHT11 protocol adalah seperti timing diagram di bawah. Microcontroller perlu memberi output low kepada sensor DHT11 sekurang-kurangnya 18ms, kemudian signal high 20-40us. Selepas itu, barulah microcontroller membaca input daripada DHT11. Start bit daripada DHT11 adalah signal low 80us dan signal high 80us. DHT11 akan memberikan 8 byte iaitu 40 bit data. Data ‘0’ adalah signal low selama 50us dan signal high selama 26-28us. Data ‘1’ adalah signal low selama 50us dan signal high selama 70us.
Berikut adalah videonya.
PIC Source Code
Sertai Telegram Group bagi dapatkan source code
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Hello Matt. Ok thank you. I will go to your website.
Nos puede Proporcionar las librerias:
“LibraryHardware.h”
“LibraryUniversalDisplay.h”
include “LibrarySensor.h”
Gracias.