Fei Wu
Bluetooth
IoT Bluetooth Fan Control
Description
This project uses Bluetooth on the smartphone to control a Smart IoT Fan that comes with an thermal sensor and a bluetooth module. The phone can access the temperature read by the thermal sensor, and send send the command to the phone and adjust the speed of the Fan accordingly.
Components
| mBed | LM19 |
| Vout | Vs |
| GND | GND |
| P15 | Vout |
| mBed | md80a |
| GND | GND |
| P5 | Ain2 |
| P6 | Ain1 |
| Vout | STBY |
Project Picture
Demo Video
Code
#include "mbed.h"
#include "Motor.h"
RawSerial dev(p13, p14);
AnalogIn temp(p15);
Motor m(p23, p6, p5);
float _temp;
float _speed = 0;
void dev_recv()
{
while(dev.readable()) {
char mode = dev.getc();
if (mode == 'T') {
_temp = temp;
_temp = 38.0-27.5*_temp;
dev.printf("%f\n",_temp);
}
if (mode=='V') {
char type = dev.getc();
if(type=='?') {
dev.printf("%f\n",_speed);
}
if(type=='+') {
if (_speed < 1.0) {
_speed= _speed + 0.1;
}
m.speed(_speed);
dev.printf("New Speed %f\n",_speed);
}
if(type=='-') {
if (_speed >= 0.1) _speed-= 0.1;
m.speed(_speed);
dev.printf("New Speed %f\n",_speed);
}
}
}
}
int main()
{
dev.baud(9600);
dev.attach(&dev_recv, Serial::RxIrq);
while(1) {
sleep();
}
}