Our IoT PoC System is temperature measurement system using Raspberry pi and Arduino. All application can run on docker.
The system senses and displays temperature using Raspberry pi with Arduino.
The arduino senses temperature, and controlls LED based on temperature.
Concretely, arduino programming language (like C) controlls sensor and LED connected aruduino.
The LED light green when range of temperature is 20-30 degrees Celsius, and red otherwise.
In addition, Raspberry pi controlls the arduino using python, and displays temperatures.
our system require below:
- Arduino
- Temperature sensor (LM75B)
- Resistor 100 Ω
- LED (green and red)
- Jumper wire and breadboard
- Raspberry pi
Wiring diagram is below:
| Aruduino pin | LM75B | LED (RED) | LED (GREEN) |
|---|---|---|---|
| 5V | VCC | ||
| A5 | SCL | ||
| A4 | SDA | ||
| GND | GND | ||
| GND | Cathode（Short leg） | ||
| DIGITAL 13 | Anode (Long leg) | ||
| GND | Cathode（Short leg） | ||
| DIGITAL 12 | Anode (Long leg) |
- Download Aruduino IDE
URL to download is below:
https://www.arduino.cc/en/Main/Software
- Sketch, compile, loading
code is below:
#include<Wire.h>
#define LM75B_address 0x48
#define temp_reg 0x00
#define REDLED 13
#define GREENLED 12
void setup() {
// put your setup code here, to run once:
Wire.begin();
Serial.begin(9600);
// temp sensor setup
Wire.beginTransmission(LM75B_address);
Wire.write(temp_reg);
Wire.endTransmission();
// Led
pinMode(REDLED,OUTPUT);
pinMode(GREENLED,OUTPUT);
}
void judge(double temp){
// judge temp < 30 or temp >=30
if (temp >= 20 && temp <= 30){
digitalWrite(REDLED,LOW);
digitalWrite(GREENLED,HIGH);
}else {
digitalWrite(GREENLED,LOW);
digitalWrite(REDLED,HIGH);
}
}
void loop() {
// put your main code here, to run repeatedly:
signed int temp_data=0;
double temp = 0.0;
Wire.requestFrom(LM75B_address,2);
while(Wire.available()){
temp_data |= (Wire.read()<<8);
temp_data |= Wire.read();
}
temp = (temp_data>>5)*0.125;
Serial.println(temp);
judge(temp);
delay(3000);
}
command is below:
# git clone
git clone https://github.com/nicuo/IoT_PoC_System.git
# Docker install
sudo curl -sSL https://get.docker.com/ | sh
# Docker file run (Data Base system)
sudo docker run -v /var/lib/mysql --name mysql_data armhf/busybox
sudo docker run --volumes-from mysql_data --name mysql -e MYSQL_ROOT_PASSWORD=mysql -d -p 3306:3306 hypriot/rpi-mysql
sudo docker exec -it mysql bash
cat << EOF > create_table.sql
CREATE TABLE temperatures (
timestamp DATETIME NOT NULL,
device_id INT NOT NULL,
temperature INT NOT NULL
);
EOF
mysql -u root -pmysql -e"CREATE DATABASE db1"
mysql db1 -u root -pmysql -e"SOURCE create_table.sql"
mysql db1 -u root -pmysql -e"INSERT INTO temperatures VALUES (NOW(), 1, 29);"
mysql db1 -u root -pmysql -e"SELECT * FROM temperatures;"
## (Contrl + p, Control + q)
# Docker file run (web system)
cd IoT_PoC_System/Web_system/
sudo docker build -t nicuo/httpd .
sudo docker run -p 8080:80 -d nicuo/httpd
# Docker file run (sensing system)
cd IoT_PoC_System/Raspberry_system/
sudo docker build -t nicuo/sensor .
sudo docker run -ti --privileged nicuo/sensor
## (Contrl + c)
nicuo
- Raspberry Pi
This application run on container by adding Docker file.
-
Aruduino
Aruduino develop plan is closed. -
Raspberry Pi
Raspberry pi gets temperatures sensed by aruduino via serial communication, displays the temperatures.
**We plan the app loaded to container. **