板载传感器实验¶
1.气压传感器¶
气压传感器是用于测量气体的绝对压强的仪器，主要适用于与气体压强相关的物理实验，如气体定律等，也可以在生物和化学实验中测量干燥、无腐蚀性的气体压强。
from machine import Pin,I2C
import time
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
class HP203B():
def get(i2c):
i2c=I2C(0, scl=Pin(18), sda=Pin(17), freq=115200)
i2c.writeto(0x77,bytearray([0x06]))#复位
while 1:
i2c.writeto(0x77,bytearray([0xec]))#写入指令
i2c.writeto(0x77,bytearray([0x40]))#配置分辨率
i2c.writeto(0x77,bytearray([0xec]))#写入指令
i2c.writeto(0x77,bytearray([0x80]))
i2c.writeto(0x77,bytearray([0xec]))#写入指令
i2c.writeto(0x77,bytearray([0x30]))#只读气压
i2c.writeto(0x77,bytearray([0xed]))#读取指令
P=i2c.readfrom(0x77,3)
p= ((P[0] << 16) | (P[1] << 8) | P[2])
if(p& 0x80000):
p |= 0xfff00000;
print('%.2fPa'%(p/100.0))
d.printStr('%.2fPa'%(p/100.0), 10, 10, RED, size=1)
i2c.writeto(0x77,bytearray([0xec]))
i2c.writeto(0x77,bytearray([0x32]))#只读温度
i2c.writeto(0x77,bytearray([0xed]))#读取指令
T=i2c.readfrom(0x77,3)
t=((T[0] << 16) | (T[1] << 8) | T[2])
if(t& 0x80000):
t |= 0xfff00000;
print('%.2fC'%(t/100.0))
d.printStr('%.2fC'%(t/100.0), 10, 30, RED, size=1)
i2c.writeto(0x77,bytearray([0xec]))
i2c.writeto(0x77,bytearray([0x31]))#只读高度
i2c.writeto(0x77,bytearray([0xed]))
H=i2c.readfrom(0x77,3)
h=((H[0] << 16) | (H[1] << 8) | H[2])
if(h& 0x80000):
h |= 0xfff00000;
print('%.2fM'%(h/100.0))
d.printStr('%.2fM'%(h/100.0), 10, 50, RED, size=1)
time.sleep(1)
print(' ')
2.温湿度传感器¶
from machine import Pin ,I2C
import time
import ahtx0
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
i2c = I2C(0, scl=Pin(18), sda=Pin(17), freq=115200)
sensor_AHT20=ahtx0.AHT20(i2c)
while 1:
time.sleep_ms(1000)
print("实时温度: %0.2f C" % sensor_AHT20.temperature)
print("实时湿度: %0.2f %%" % sensor_AHT20.relative_humidity)
d.printStr("Temperature_:%0.2f C" % sensor_AHT20.temperature, 10, 20, RED, size=1)
d.printStr("Humidity_:%0.2f %%" % sensor_AHT20.relative_humidity, 10, 50, RED, s
3.罗盘传感器¶
from machine import Pin ,I2C
import time
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
i2c = I2C(0,scl = Pin(18),sda = Pin(17),freq =115200)
QMC5883_ADDR=0xd
QMC5883_0x0b=0x01
QMC5883_0x20=0X40
QMC5883_0x21 =0x01
QMC5883_0x09 =0x0d
t1=[0x09,QMC5883_0x09,0x00,QMC5883_0x0b]
t2=[0x20,QMC5883_0x20,QMC5883_0x21]
while 1:
i2c.writeto(QMC5883_ADDR,bytearray(t1),4)
i2c.writeto(QMC5883_ADDR,bytearray(t2),3)
i=i2c.readfrom(QMC5883_ADDR,8)
hpx=i[2];
hpx=i[3]<<8|hpx;
hpy=i[4];
hpy=i[5]<<8|hpy;
hpz=i[6];
hpz=i[7]<<8|hpz;
hx=i[0]
x=hpx*79.61/12000
y=hpy*79.61/12000
z=hpz*79.61/12000
print('x:%.2f'%x+' y:%.2f'%y+' z:%.2f'%z)
d.printStr('x:%.2f'%x+' y:%.2f'%y+' z:%.2f'%z, 10, 10, RED, size=1)
time.sleep(1)
4.环境光传感器¶
from machine import Pin,I2C
import time
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
gy30_addr = 0x29
i2c = I2C(0,scl = Pin(18),sda = Pin(17),freq =115200)
i2c.writeto(gy30_addr,bytearray([0x80,0x03]))
i2c.writeto(gy30_addr,bytearray([0x94]))
t=i2c.readfrom(gy30_addr,4)
while 1:
gy = i2c.readfrom(gy30_addr,2)
gy30 = float(gy[0] << 8 | gy[1])/240
time.sleep(1)
print('%.2f'%gy30)
d.printStr('%.2f'%gy30, 10, 10, RED, size=1)
5.超声波传感器¶
from machine import Pin
import time
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
trig = Pin(36,Pin.OUT)
echo = Pin(35, Pin.IN)
trig.off()
echo.off()
def fasong():
trig.on()
time.sleep_us(10)
trig.off()
while(echo.value() == 0):
pass
t1 = time.ticks_us()
while(echo.value() == 1):
pass
t2 = time.ticks_us()
t3 = time.ticks_diff(t2,t1)/10000
return t3*340/2
try:
while 1:
print("障碍物距离为:%0.2f cm" %fasong())
d.printStr("Distance:%3.2f cm" %fasong(), 10, 10, RED, size=2)
time.sleep(1)
except KeyboardInterrupt:
pass
6.红外热释电传感器¶
import time
from neopixel import NeoPixel
from machine import SoftI2C,Pin #从machine模块导入I2C、Pin子模块
Human=Pin(1,Pin.IN,Pin.PULL_UP) #构建人体红外对象
pin = Pin(0, Pin.OUT) # 设置引脚GPIO0来驱动 NeoPixels
np = NeoPixel(pin, 4)
while True:
if Human.value()==1:
np[1] = (10, 0, 0)
np.write()
else :
np[1] = (0, 0, 0)
np.write()
7.重力陀螺仪传感器¶
from machine import I2C,Pin
import time
import qmi8658
qmi8658=qmi8658.IMU_QMI8658C()
from tftlcd import LCD24
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)
BLACK = (0,0,0)
WHITE = (255,255,255)
d = LCD24(portrait=1)
d.fill(WHITE)
while 1:
xyz=qmi8658.Read_XYZ()
time.sleep(1)
print("ACC_X=%.2f"%xyz[0])
print("ACC_Y=%.2f"%xyz[1])
print("ACC_Z=%.2f"%xyz[2])
print("GYR_X=%3.2f"%(xyz[3]+15))
print("GYR_Y=%3.2f"%xyz[4])
print("GYR_Z=%3.2f"%xyz[5])
print(' ')
d.printStr("ACCX=%.2f"%xyz[0], 10, 10, RED, size=1)
d.printStr("ACCY=%.2f"%xyz[1], 10, 30, RED, size=1)
d.printStr("ACCZ=%.2f"%xyz[2], 10, 50, RED, size=1)
d.printStr("GYRX=%3.2f"%(xyz[3]+15), 10, 70, RED, size=1)
d.printStr("GYRY=%3.2f"%xyz[4], 10, 90, RED, size=1)
d.printStr("GYRZ=%3.2f"%xyz[5], 10, 110, RED, size=1)