由ESP3zhujipindao串口屏幕(ESP32网络摄像机)组成的疫情监控平台

摘要:采用硬件组件作为主控。该模型是用于显示的连续屏幕。模型到模型模块用于调试。第二，在官网设置和下载开发环境。

一、硬件组成

Esp32用作主机。(型号:esp32_devkitc_v4)串行屏幕用于显示。(型号:TJC3224T024_011)Usb转ttl模块用于调试。二、开发环境(Arduino IDE)

去https://www.arduino.cc/en/software,官网下载Arduino IDE。安装后，界面如下:构建esp32开发环境:点击文件/首选项:

输入:https://dl.espressif.com/dl/package_esp32_index.json保存并重启Arduino。

选择工具/开发板管理器

搜索esp32并下载安装。

完成后，您可以看到esp32

3.向api接口发送HTTP请求并解析它

1.在Arduino中安装所需的库文件:单击工具/管理库。

在搜索框中输入WiFi，选择要安装的库文件。

2.设备初始化代码

#include //用于连接WiFi网络#include //用于向服务器请求数据信息#include //用于解析返回的json数据const char * dssid = " ssid//您的网络名称const char * password = " password//你的网络密码void setup() {//做设备初始化serial . begin(115200)；//将串口波特率初始化为115200 serial . println(" ")；//打印一个空行WiFi.begin(dssid，password)；//连接指定wifi while (WiFi.status()！= WL _连接){延迟(500)；Serial.print(" . ");}//连接返回...Serial.println("WiFi已连接！");//WiFi连接成功//把你的设置代码放在这里，要运行一次:} 3。请求数据并返回。

void loop(){ http client http；//建立HTTPClient对象http . begin(" https://lab . isaaclin . cn/ncov/API/overall ")；//发送http数据请求int httpCode = http。GET()到此URL//保存返回的状态码//把你的主代码放在这里，要重复运行:If(HTTP CODE > 0)//如果状态码大于0，则请求过程没有异常{if (httpCode == HTTP_CODE_OK) //请求被服务器正常响应，相当于HTTP CODE = = 200 { string payload = HTTP . getstring()；//读取服务器返回的响应体数据serial . println(payload)；//串口打印返回的数据}} else {//没有得到响应，返回错误码serial.printf ("[http] get...失败，错误:% s/n "，http.errortostring (httpcode)。c _ str())；} http . end()；//结束当前连接延迟(1200000)；//每两分钟发送一次请求，过于频繁可能导致ip被接口阻塞} 4。下载验证:开发板型号选择:

PS:端口根据自身情况选择。

串行端口打印结果如下:

返回的数据是:

5.json解析返回的数据:定义结构。

Struct ncov_data{ //此结构用于保存数据long currentConfirmedCount//现有已确认的long currentConfirmedIncr//对比昨天的long confirmedCountlong confirmedIncr累计诊断；//long curedCount对比昨天；//长期固化的累积固化；//与昨天的long seriousCount相比；//现有的无症状长seriousIncr//相比昨天的长deadCount//累计死亡长deadIncr//String updateTime与昨天相比；//更新时间}；Json初始化

ncov_data中国_ data；//国内疫情数据ncov _ data World _ data//国外疫情数据DynamicJsonDocument doc(1000)；//创建DynamicJsonDocument对象deserializeJson(doc，payload)；//反序列化数据JSON object results _ 0 = doc[" results "][0]；解析数据分配

China _ data . currentConfirmedCount = results _ 0[" currentConfirmedCount "]。as()；China _ data . currentconfirmed incr = results _ 0[" currentconfirmed incr "]。as()；China _ data . confirmed count = results _ 0[" confirmed count "]。as()；China _ data . confirmed incr = results _ 0[" confirmed incr "]。as()；China _ data . cured count = results _ 0[" cured count "]。as()；China _ data . cured incr = results _ 0[" cured incr "]。as()；China _ data . dead count = results _ 0[" dead count "]。as()；China _ data . dead incr = results _ 0[" dead incr "]。as()；China _ data . serious count = results _ 0[" serious count "]。as()；China _ data . serious incr = results _ 0[" serious incr "]。as()；world _ data . currentConfirmedCount = results _ 0[" global statistics "][" currentConfirmedCount "]。as()；world _ data . currentconfirmed incr = results _ 0[" global statistics "][" currentconfirmed incr "]。as()；world _ data . confirmed count = results _ 0[" global statistics "][" confirmed count "]。as()；world _ data . confirmed incr = results _ 0[" global statistics "][" confirmed incr "]。as()；world _ data . cured count = results _ 0[" global statistics "][" cured count "]。as()；world _ data . cured incr = results _ 0[" global statistics "][" cured incr "]。as()；world _ data . dead count = results _ 0[" global statistics "][" dead count "]。as()；world _ data . dead incr = results _ 0[" global statistics "][" dead incr "]。as()；串行端口打印

serial . println(" ")；serial . println(" --------------------------------------------------4 serial . print("现有诊断:")；serial . println(China _ data . currentconfirmed count)；Serial.print("累积诊断:")；serial . println(China _ data . confirmed count)；Serial.print("累积固化:")；serial . println(China _ data . cured count)；Serial.print("无症状存在:")；serial . println(China _ data . serious count)；Serial.print("累计死亡:")；serial . println(China _ data . dead count)；serial . println(" ----------------------------------------serial . print("现有诊断:")；serial . println(World _ data . currentconfirmed count)；Serial.print("累积诊断:")；serial . println(World _ data . confirmed count)；Serial.print("累积固化:")；serial . println(World _ data . cured count)；Serial.print("累计死亡:")；serial . println(World _ data . dead count)；

4.将数据发送到串行屏幕并显示。

1.下载USART HMI串行屏幕软件，构建您喜欢的ui。你可以自己跳过这个过程。

2.Arduino代码:串行端口定义

#定义TJC Serial2 //串口屏幕将发送和接收串口定义为串口2初始化。

tjc . begin(115200)；//将发送和接收串口的波特率初始化为115200 while(tjc . read()> = 0)；//等待串口屏幕连接成功的字符串定义。

char str 1[20]；char str 2[20]；char str 3[20]；char str 4[20]；char str 5[20]；char str 6[20]；char str 7[20]；char str 8[20]；char str 9[20]；char str 10[20]；Sprintf格式拼接

sprintf(str1，" n0.val=%d/xff/xff/xff "，China _ data . current confirmed count)；sprintf(str6，" n5.val=%d/xff/xff/xff "，China _ data . current confirmed incr)；sprintf(str2，" n1.val=%d/xff/xff/xff "，China _ data . confirmed count)；sprintf(str7，" n6.val=%d/xff/xff/xff "，China _ data . confirmed incr)；sprintf(str3，" n2.val=%d/xff/xff/xff "，China _ data . cured count)；sprintf(str8，" n7.val=%d/xff/xff/xff "，China _ data . cured incr)；sprintf(str4，" n3.val=%d/xff/xff/xff "，China _ data . dead count)；sprintf(str9，" n8.val=%d/xff/xff/xff "，China _ data . dead incr)；sprintf(str5，" n4.val=%d/xff/xff/xff "，China _ data . serious count)；sprintf(str10，" n9.val=%d/xff/xff/xff "，China _ data . serious incr)；数据传输

tjc . print(str 1)；tjc . print(str 2)；tjc . print(str 3)；tjc . print(str 4)；tjc . print(str 5)；tjc . print(str 6)；tjc . print(str 7)；tjc . print(str 8)；tjc . print(str 9)；tjc . print(str 10)；3.将esp32的rx和tx引脚分别连接到串行屏幕的tx和rx引脚。

4.参考文章:疫情监测三部曲——在STM32F103 MCU(裸机版)-云+社区-腾讯云(tencent.com)上的实现

动词 （verb的缩写）完全码

#include //用于连接WiFi网络#include //用于向服务器请求数据信息#include //用于解析返回的json数据#定义TJC串口2 //串口屏幕发送和接收串口定义为串口2const char * dssid = " DOG//您的网络名称constchar * password = " 6666666//您的网络密码结构ncov_data{ //该结构用于存储数据long currentConfirmedCount//现有已确认的long currentConfirmedIncr//对比昨天的long confirmedCountlong confirmedIncr累计诊断；//long curedCount对比昨天；//长期固化的累积固化；//与昨天的long seriousCount相比；//现有的无症状长seriousIncr//相比昨天的长deadCount//累计死亡长deadIncr//String updateTime与昨天相比；//更新时间}；Void setup() {//做设备初始化serial . begin(115200)；//将串口波特率初始化为115200 tjc . begin(115200)；//初始化发送和接收串口的波特率为115200 while(tjc . read()> = 0)；//等待串口屏幕连接成功serial . println(" ")；//打印一个空行WiFi.begin(dssid，password)；//连接指定wifi while (WiFi.status()！= WL _连接){延迟(500)；Serial.print(" . ");}//连接返回...Serial.println("WiFi已连接！");//WiFi连接成功//把你的设置代码放在这里，要运行一次:} void loop () {http客户端http；//建立HTTPClient对象http . begin(" https://lab . isaaclin . cn/ncov/API/overall ")；//发送http数据请求int httpCode = http。GET()到此URL//保存返回的状态码//把你的主代码放在这里，要重复运行:If(HTTP CODE > 0)//如果状态码大于0，则请求过程没有异常{if (httpCode == HTTP_CODE_OK) //请求被服务器正常响应，相当于HTTP CODE = = 200 { string payload = HTTP . getstring()；//读取服务器返回的响应体数据serial . println(payload)；//串口打印返回的数据ncov _ data China _ data//国内疫情数据ncov _ data World _ data//国外疫情数据DynamicJsonDocument doc(1000)；//创建DynamicJsonDocument对象deserializeJson(doc，payload)；//反序列化数据JSON object results _ 0 = doc[" results "][0]；//将解析后的数据赋给结构China _ data . current confirmidcount = results _ 0[" current confirmidcount "]。as()；China _ data . currentconfirmed incr = results _ 0[" currentconfirmed incr "]。as()；China _ data . confirmed count = results _ 0[" confirmed count "]。as()；China _ data . confirmed incr = results _ 0[" confirmed incr "]。as()；China _ data . cured count = results _ 0[" cured count "]。as()；China _ data . cured incr = results _ 0[" cured incr "]。as()；China _ data . dead count = results _ 0[" dead count "]。as()；China _ data . dead incr = results _ 0[" dead incr "]。as()；China _ data . serious count = results _ 0[" serious count "]。as()；China _ data . serious incr = results _ 0[" serious incr "]。as()；world _ data . currentConfirmedCount = results _ 0[" global statistics "][" currentConfirmedCount "]。as()；world _ data . currentconfirmed incr = results _ 0[" global statistics "][" currentconfirmed incr "]。as()；world _ data . confirmed count = results _ 0[" global statistics "][" confirmed count "]。as()；world _ data . confirmed incr = results _ 0[" global statistics "][" confirmed incr "]。as()；world _ data . cured count = results _ 0[" global statistics "][" cured count "]。as()；world _ data . cured incr = results _ 0[" global statistics "][" cured incr "]。as()；world _ data . dead count = results _ 0[" global statistics "][" dead count "]。as()；world _ data . dead incr = results _ 0[" global statistics "][" dead incr "]。as()；//string定义char str 1[20]；char str 2[20]；char str 3[20]；char str 4[20]；char str 5[20]；char str 6[20]；char str 7[20]；char str 8[20]；char str 9[20]；char str 10[20]；char str 11[20]；char str 12[20]；char str 13[20]；char str 14[20]；char str 15[20]；char str 16[20]；char str 17[20]；char str 18[20]；//使用sprintf进行格式拼接Sprintf (str1，" n0.val =% d/xff/xff/xff "，China _ data . current confirmed count)；sprintf(str6，" n5.val=%d/xff/xff/xff "，China _ data . current confirmed incr)；sprintf(str2，" n1.val=%d/xff/xff/xff "，China _ data . confirmed count)；sprintf(str7，" n6.val=%d/xff/xff/xff "，China _ data . confirmed incr)；sprintf(str3，" n2.val=%d/xff/xff/xff "，China _ data . cured count)；sprintf(str8，" n7.val=%d/xff/xff/xff "，China _ data . cured incr)；sprintf(str4，" n3.val=%d/xff/xff/xff "，China _ data . dead count)；sprintf(str9，" n8.val=%d/xff/xff/xff "，China _ data . dead incr)；sprintf(str5，" n4.val=%d/xff/xff/xff "，China _ data . serious count)；sprintf(str10，" n9.val=%d/xff/xff/xff "，China _ data . serious incr)；//发送数据tjc . print(str 1)；tjc . print(str 2)；tjc . print(str 3)；tjc . print(str 4)；tjc . print(str 5)；tjc . print(str 6)；tjc . print(str 7)；tjc . print(str 8)；tjc . print(str 9)；tjc . print(str 10)；tjc . print(" page 1/xff/xff/xff ")；sprintf(str11，" n10.val=%d/xff/xff/xff "，World _ data . current confirmed count)；sprintf(str12，" n11.val=%d/xff/xff/xff "，World _ data . current confirmed incr)；sprintf(str13，" n12.val=%d/xff/xff/xff "，World _ data . confirmed count)；sprintf(str14，" n13.val=%d/xff/xff/xff "，World _ data . confirmed incr)；sprintf(str15，" n14.val=%d/xff/xff/xff "，World _ data . cured count)；sprintf(str16，" n15.val=%d/xff/xff/xff "，World _ data . cured incr)；sprintf(str17，" n16.val=%d/xff/xff/xff "，World _ data . dead count)；sprintf(str18，" n17.val=%d/xff/xff/xff "，World _ data . dead incr)；tjc . print(str 11)；tjc . print(str 12)；tjc . print(str 13)；tjc . print(str 14)；tjc . print(str 15)；tjc . print(str 16)；tjc . print(str 17)；tjc . print(str 18)；tjc . print(" page 0/xff/xff/xff ")；//串口打印//serial . println(" ")；//serial . println(" --------------------------------------------4//serial . print("现有诊断:")；serial . println(China _ data . currentconfirmed count)；// Serial.print("累积诊断:")；serial . println(China _ data . confirmed count)；// Serial.print("累积治愈:")；serial . println(China _ data . cured count)；// Serial.print("无症状存在:")；serial . println(China _ data . serious count)；// Serial.print("累计死亡:")；serial . println(China _ data . dead count)；//serial . println(" --------------------------------------------4//serial . print("现有诊断:")；serial . println(World _ data . currentconfirmed count)；// Serial.print("累积诊断:")；serial . println(World _ data . confirmed count)；// Serial.print("累积治愈:")；serial . println(World _ data . cured count)；// Serial.print("累计死亡:")；serial . println(World _ data . dead count)；}} else {//没有得到响应，返回了错误代码serial.printf ("[http] get...失败，错误:% s/n "，http.errortostring (httpcode)。c _ str())；} http . end()；//结束当前连接延迟(1200000)；//每两分钟发送一次请求，过于频繁可能导致ip被接口} VI阻塞。展示效果。