Bluetooth
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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(); } }