材料

1. 数码管
2. Nodemcu
3. 杜邦线

原理

请求哔哩哔哩接口,然后用数码管显示返回数据

我看了一下哔哩哔哩爬虫的代码,然后自己仿着写了一个接口，虽然最后也没用到该接口凸(艹皿艹 )

测试接口:http://47.99.118.233:8080/api/fans?uid=406868   uid代表的是用户ID

大家也可以参考爬虫代码然后自己写一个接口~

代码

已经有用户开源了,我们可以直接使用

烧录就可以使用了

/**********************************************************************
* 项目：bilibili粉丝数监视器
* 硬件：适用于NodeMCU ESP8266 + MAX7219
* 功能：连接WiFi后获取指定用户的哔哩哔哩实时粉丝数并在8位数码管上居中显示
* 作者：flyAkari 会飞的阿卡林 bilibili UID:751219
* 日期：2018/09/18
**********************************************************************/
//硬件连接说明：
//MAX7219 — ESP8266
// VCC — 3V(3.3V)
// GND — G (GND)
// DIN — D7(GPIO13)
// CS — D1(GPIO5)
// CLK — D5(GPIO14)
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <ESP8266HTTPClient.h>
//—————修改此处””内的信息——————–
const char* ssid = “Akari”; //WiFi名
const char* password = “uid751219”; //WiFi密码
String biliuid = “751219”; //bilibili UID
//—————————————————-
DynamicJsonDocument jsonBuffer(200);
WiFiClient client;

const int slaveSelect = 5;
const int scanLimit = 7;

int number = 0;

void setup()
{
Serial.begin(9600);
SPI.begin();
pinMode(slaveSelect, OUTPUT);
digitalWrite(slaveSelect, LOW);
sendCommand(12, 1); //Shutdown,open
sendCommand(15, 0); //DisplayTest,no
sendCommand(10, 15); //Intensity,15(max)
sendCommand(11, scanLimit); //ScanLimit,8-1=7
sendCommand(9, 255); //DecodeMode,Code B decode for digits 7-0
digitalWrite(slaveSelect, HIGH);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(“.”);
}
Serial.println(“”);
Serial.println(“WiFi connected”);
Serial.println(“IP address: “);
Serial.println(WiFi.localIP());
}

void loop()
{
if (WiFi.status() == WL_CONNECTED) //此处感谢av30129522视频作者的开源代码
{
HTTPClient http;
http.begin(“http://api.bilibili.com/x/relation/stat?vmid=” + biliuid);
auto httpCode = http.GET();
Serial.println(httpCode);
if (httpCode > 0) {
String resBuff = http.getString();
DeserializationError error = deserializeJson(jsonBuffer, resBuff);
if (error) {
Serial.println(“json error”);
while (1);
}
JsonObject root = jsonBuffer.as<JsonObject>();
long code = root[“code”];
Serial.println(code);
long fans = root[“data”][“follower”];
Serial.println(fans);
displayNumber(fans);
delay(1000);
}
}
if (Serial.available()) //Test number display
{
Serial.println(“available”);
char ch = Serial.read();
if (ch == ‘\n’)
{
displayNumber(number);
Serial.println(number);
number = 0;
}
else
{
number = (number * 10) + ch – ‘0’;
}
}
}

void sendCommand(int command, int value)
{
digitalWrite(slaveSelect, LOW);
SPI.transfer(command);
SPI.transfer(value);
digitalWrite(slaveSelect, HIGH);
}

void displayNumber(int number) //display number in the middle
{
if (number < 0 || number > 99999999) return;
int x = 1;
int tmp = number;
for (x = 1; tmp /= 10; x++);
for (int i = 1; i < 9; i++)
{
if (i < (10 – x) / 2 || i >= (x / 2 + 5))
{
sendCommand(i, 0xf);
}
else
{
int character = number % 10;
sendCommand(i, character);
number /= 10;
}
}
}