一、实验器件
- 1、TPYBoard v102 1块
- 2、TPYBoard v202 1块
- 3、Nokia 5110LCD显示屏 1块
- 4、DHT11温湿度传感器 1个
- 5、micro USB 数据线 2根
- 6、面包板 1块
- 7、杜邦线 若干
二、实验步骤
- 1、TPYBoard v102连接DHT11,采集温湿度信息;
- 2、TPYBoard v102将采集到的温湿度信息显示在LCD5110上;
- 3、TPYBoard v102通过串口将温湿度信息发送给TPYBoard v202;
- 4、TPYBoard v202 将串口的数据读取出来,同时传递到服务器上。
三、实验方法
Nokia 5110 LCD显示屏说明LCD5110是一款84x48 的点阵LCD,可以显示4 行汉字。采用串行接口与主处理器进行通信,支持多种串行通信协议(如AVR 单片机的SPI、MCS51 的串口模式0等),传输速率高达4Mbps,可全速写入显示数据。
Nokia 5110 LCD共有8个引脚,不同的板子可能标注的英文略有不同,具体参照如下:
DHT11温湿度说明DHT11是一款有已校准数字信号输出的温湿度传感器。 精度湿度+-5%RH, 温度+-2℃,量程湿度20-90%RH, 温度0~50℃。DHT11温湿度共有3个引脚,具体参照如下:
四、接线方式
针脚对应图DHT11和LCD5110的使用方法上面都介绍过了,接下来,就要动手和我们的TPYBoard v102 接起来了。TPYBoard v102连接LCD5110
TPYBoard v102连接DHT11
TPYBoard v102连接TPYBoard v202
实物连接图
四、源代码
TPYBoard v102 源代码TPYBoard v102 main.py文件内容如下:服务器源码SensorData.php 文件内容如下:#main.py import pyb import upcd8544 from machine import SPI,Pin from dht11 import DHT11 def main(lcd_5110,dht,uart6): data_=dht.read_data() lcd_5110.lcd_write_string(' ',0,1)#添加一个分隔行 lcd_5110.lcd_write_string('Temp:'+str(data_[0]),2,2) lcd_5110.lcd_write_string(' ',0,3) lcd_5110.lcd_write_string(' Hum:'+str(data_[1]),2,4) uart6.write(str(data_[0])+','+str(data_[1]))#通过串口将数据发送给v202 if __name__ == '__main__': #init UART u6=pyb.UART(6,115200) #init DHT11 dht=DHT11('X12') #init LCD5110 SPI = pyb.SPI(1) RST = pyb.Pin('Y11') CE = pyb.Pin('Y10') DC = pyb.Pin('Y9') LIGHT = pyb.Pin('X4') #DIN=>X8-MOSI/CLK=>X6-SCK #DIN =>SPI(1).MOSI 'X8' data flow (Master out, Slave in) #CLK =>SPI(1).SCK 'X6' SPI clock lcd_5110 = upcd8544.PCD8544(SPI, RST, CE, DC, LIGHT) lcd_5110.lcd_write_string('TPYBoard v102',1,0) while True: main(lcd_5110,dht,u6) pyb.delay(2000) TPYBoard v202 源代码只有1个main.py 文件: TPYBoard v202 main.py文件内容,如下: import machine import network import socket from machine import Pin from machine import UART import time u2=UART(0,115200)#串口初始化 led = Pin(2, Pin.OUT).value(1)#板载小蓝灯 默认关闭 def http_get(temp,hum): url='http://www.tpyboard.com/esp8266/SensorTest.php?t='+temp+'&h='+hum+'' _, _, host, path = url.split('/', 3) addr = socket.getaddrinfo(host, 80)[0][-1] s = socket.socket() s.connect(addr) s.send(bytes('GET /%s HTTP/1.0 Host: %s ' % (path, host), 'utf8')) while True: data = s.recv(50) if data: recive=str(data, 'utf8').upper() #print(str(data, 'utf8'), end='') if(recive.find('YES')>-1): print('Send Data OK') else: break s.close() def do_connect(): wlan = network.WLAN(network.STA_IF) wlan.active(True) if not wlan.isconnected(): print('connecting to network...') wlan.connect( 'ssid', 'pwd') while not wlan.isconnected(): pass print('network config:', wlan.ifconfig()) do_connect() led = Pin(2, Pin.OUT).value(0)#连接wifi成功 点亮LED while 1: data_=u2.readall() if data_!=None: data_=data_.decode('utf8')#数组转成字符串 data_a=data_.split(',')#分割 temp_=str(data_a[0])#温度 hum_=str(data_a[1])#湿度 http_get(temp_,hum_)#发送给服务器 time.sleep(2)
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>温湿度传感器实验</title> <script type="text/javascript"> var t; var te_html_str="N/A"; function timedCount() { <?php $myfile = fopen("sensor.txt", "r"); $txt =fread($myfile,filesize("sensor.txt")); fclose($myfile); if($txt!="") { echo "te_html_str='".$txt."';"; } ?> document.getElementById('test').innerHTML=te_html_str; t=setTimeout("javascript:location=location;",1000) } </script> </head> <body onload="timedCount()"> <center> <div style="margin-top:80px"> <h2>TPYBoardV202_温湿度传感器实验</h2> <div id="test"></div> </div> </center> </body> </html> SensorTest.php 文件内容如下: <?php $time_="获取时间:".date('Y-m-d H:i:s'); $data_="传感器数据:Sensor Error!"; $state_="No"; if(is_array($_GET)&&count($_GET)>1) { $data_=""; //获取温度 if(isset($_GET["t"])) { $para=$_GET["t"]; $data_.="传感器数据:温度:".$para." ℃ - "; } //获取湿度 if(isset($_GET["h"])) { $para=$_GET["h"]; $data_.="湿度:".$para." % "; $state_="Yes"; } } $myfile = fopen("sensor.txt", "w"); $txt = $time_."<br /><br />".$data_; fwrite($myfile, $txt); fclose($myfile); echo $state_; ?>
五、效果图
实物效果图
网页效果图