How to get it
ESP8266 initiates HTTP request + parses json data
Get fans API: https://api.bilibili.com/x/relation/stat?vmid=349513188
API browser test return results
{<!-- -->
"code": 0,
"message": "0",
"ttl": 1,
"data": {<!-- -->
"mid": 349513188, //User's UID number
"following": 1223, //The number of users' following
"whisper": 0,
"black": 0,
"follower": 7951 //The number of followers of the user
}
}
Actual results
Development method/hardware platform
Arduino IDE + ESP8266 NODEMCU board
Implementation steps
-
Install ArduinoIED development environment
This is very simple, just search the official website address and download it. https://www.arduino.cc/en/software
-
Add development board
link address:
https://arduino.esp8266.com/stable/package_esp8266com_index.json -
Install the libraries required for the project
#include <ESP8266WiFi.h> // This program uses the ESP8266WiFi library #include <WiFiClient.h> #include <ESP8266HTTPClient.h> #include <WiFiClientSecureBearSSL.h> #include <ArduinoJson.h>
Among them, the ArduinoJson library needs to be installed separately, and other development boards will be installed automatically after selecting it.
- CV Dafa
This process is quite long, so I won’t record it one by one. Anyway, I encountered a lot of pitfalls and learned a lot of knowledge.
Directly upload the final version code
#include <ESP8266WiFi.h> // This program uses the ESP8266WiFi library
#include <WiFiClient.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClientSecureBearSSL.h>
#include <ArduinoJson.h>
const char* ssid = "AQST"; //Connect WiFi name
const char* password = "123456789"; // Password for connecting to WiFi (123456789 is used as an example here)
const String host = "https://api.bilibili.com";
const String path = "/x/relation/stat?vmid=";
const String uid = "349513188";
const unsigned char fingerprint[] = {0x00,0xb3,0x57,0x0f,0xaa,0x95,0xc7,0x03,0xeb,0x78,0x30,0xd9,0xfc,0xd8,0x2b,
0x89,0xd8,0xce,0x06,0xa8,0x30,0x4e,0x7a,0x8d,0x3f,0x18,0x60,0xa5,0x90,0x74,0xf4,0xdc};
/*
Access API instructions: https://api.bilibili.com/x/relation/stat?vmid=349513188
The browser accesses the above connection to get the data:
{
"code": 0,
"message": "0",
"ttl": 1,
"data": {
"mid": 349513188,
"following": 1223,
"whisper": 0,
"black": 0,
"follower": 7951
}
}
Parameter Description:
host:api.bilibili.com
path:/x/relation/stat?vmid=
uid:349513188
*/
/*
Original link: https://blog.csdn.net/weixin_43794311/article/details/133140939
*/
void de_json(String input)
{
//From here it is generated using auxiliary tools
StaticJsonDocument<256> doc;
DeserializationError error = deserializeJson(doc, input);
if(error)
{
Serial.print(F("deserializeJson() failed: "));
Serial.println(error.f_str());
return;
}
int code = doc["code"]; // 0
const char* message = doc["message"]; // "0"
int ttl = doc["ttl"]; // 1
JsonObject data = doc["data"];
long data_mid = data["mid"]; // 231216575
int data_following = data["following"]; // 154
int data_whisper = data["whisper"]; // 0
int data_black = data["black"]; // 0
int data_follower = data["follower"]; // 1
//The code obtained by the auxiliary tool ends here. The following is the content you want to display.
Serial.println("=======================");
//Serial.println(ttl);
Serial.print("The USID of the fledgling Xiao Li is: "); // The serial monitor outputs the user ID
Serial.println(data_mid);
Serial.print("Number of fans of the fledgling Xiao Li B station: "); // Serial monitor outputs the number of fans
Serial.println(data_follower);
Serial.print("The number of followers of the fledgling Xiaoli B station: "); // The serial port monitor outputs the number of followers
Serial.println(data_following);
Serial.print("=======================");
Serial.println();
}
void setup() {
pinMode(2, OUTPUT); //Set GPIO2 to output mode
digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)
Serial.begin(9600); // Start serial communication
WiFi.begin(ssid, password); // Start network connection
Serial.print("Connecting to "); // The serial monitor outputs network connection information
Serial.print(ssid);
Serial.println(" ..."); // Inform the user that NodeMCU is trying to connect to WiFi
int i = 0; // This program statement is used to check whether the WiFi connection is successful
while (WiFi.status() != WL_CONNECTED) //The return value of the WiFi.status() function is determined by the WiFi connection status of NodeMCU.
{
delay(1000); // If the WiFi connection is successful, the return value is WL_CONNECTED
Serial.print(i + + ); Serial.print(' '); // Here, the While loop is used to let NodeMCU check the return value of the WiFi.status() function every second
// At the same time, NodeMCU will output the connection duration count in seconds through the serial port monitor.
}
Serial.println(""); // After successful WiFi connection
Serial.println("Connection successful!"); // NodeMCU will output "Connection successful" information through the serial port monitor.
Serial.print("The IP address is: "); // The IP address of NodeMCU will also be output. This function is done by calling
Serial.println(WiFi.localIP()); // Implemented by WiFi.localIP() function. The return value of this function is the IP address of NodeMCU.
}
void loop() {
digitalWrite(2, HIGH);
delay(1000);
digitalWrite(2, LOW);
delay(1000);
if(WiFi.status()==WL_CONNECTED)
{
std::unique_ptrclient(new BearSSL::WiFiClientSecure);
// client->setFingerprint(fingerprint);
client->setInsecure(); //You can also log in without using a fingerprint certificate
HTTPClient https;
Serial.print("[HTTPS] begin...\
");
if(https.begin(*client,host + path + uid))
{ // HTTPS
Serial.print("[HTTPS] GET...\
");
// start connection and send HTTP header
int httpCode = https.GET(); //Status code returned by accessing url
// httpCode will be negative on error
if (httpCode > 0)
{
// HTTP header has been sent and Server response header has been handled
Serial.printf("[HTTPS] GET... code: %d\
", httpCode);
// file found at server
if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY)
{
String payload = https.getString();
Serial.println(payload);
de_json(payload); //Parse and display the requested json data
}
}
else
{
Serial.printf("[HTTPS] GET... failed, error: %s\
", https.errorToString(httpCode).c_str());
}
https.end();
}
else
{
Serial.printf("[HTTPS] Unable to connect\
");
}
}
Serial.println("The code is running...");
delay(5000);
}
Code explanation
- GPIO2 is an LED light that comes with the development board.
- AQST is the name of the hotspot on my computer
- 123456789 is the password for the hotspot on your computer
The effect after connecting
Compile code
Compilation results
. Variables and constants in RAM (global, static), used 29316 / 80192 bytes (36%) ║ SEGMENT BYTES DESCRIPTION ╠══ DATA 1504 initialized variables ╠══ RODATA 1948 constants ╚══ BSS 25864 zeroed variables . Instruction RAM (IRAM_ATTR, ICACHE_RAM_ATTR), used 60603 / 65536 bytes (92%) ║ SEGMENT BYTES DESCRIPTION ╠══ ICACHE 32768 reserved space for flash instruction cache ╚══ IRAM 27835 code in IRAM . Code in flash (default, ICACHE_FLASH_ATTR), used 361136 / 1048576 bytes (34%) ║ SEGMENT BYTES DESCRIPTION ╚══ IROM 361136 code in flash
Upload code
Upload log
esptool.py v3.0 Serial port COM16 Connecting.... Chip is ESP8266EX Features: WiFi Crystal is 26MHz MAC: e8:db:84:e1:5a:a8 Uploading stub... Running stub... Stub running... Configuring flash size... Auto-detected Flash size: 4MB Compressed 396576 bytes to 293196... Writing at 0x00000000... (5 %) Writing at 0x00004000... (11 %) Writing at 0x00008000... (16 %) Writing at 0x0000c000... (22%) Writing at 0x00010000... (27 %) Writing at 0x00014000... (33%) Writing at 0x00018000... (38%) Writing at 0x0001c000... (44%) Writing at 0x00020000... (50 %) Writing at 0x00024000... (55%) Writing at 0x00028000... (61 %) Writing at 0x0002c000... (66 %) Writing at 0x00030000... (72%) Writing at 0x00034000... (77 %) Writing at 0x00038000... (83%) Writing at 0x0003c000... (88 %) Writing at 0x00040000... (94%) Writing at 0x00044000... (100 %) Wrote 396576 bytes (293196 compressed) at 0x00000000 in 26.0 seconds (effective 122.2 kbit/s)... Hash of data verified. Leaving... Hard resetting via RTS pin...
Operating effect
[HTTPS] GET...
[HTTPS] GET... code: 200
{<!-- -->"code":0,"message":"0","ttl":1,"data":{<!-- -->"mid":349513188,"following": 1223,"whisper":0,"black":0,"follower":7951}}
=======================
Xiao Li’s USID is: 349513188
The number of fans of Xiao Li’s B station: 7951
Number of followers on the fledgling Xiao Li B station: 1223
=======================
Code is running...
[HTTPS] begin...
[HTTPS] GET...
[HTTPS] GET... code: 200
{<!-- -->"code":0,"message":"0","ttl":1,"data":{<!-- -->"mid":349513188,"following": 1223,"whisper":0,"black":0,"follower":7951}}
=======================
Xiao Li’s USID is: 349513188
The number of fans of Xiao Li’s B station: 7951
Number of followers on the fledgling Xiao Li B station: 1223
=======================
Code is running...
[HTTPS] begin...
[HTTPS] GET...
[HTTPS] GET... code: 200
{<!-- -->"code":0,"message":"0","ttl":1,"data":{<!-- -->"mid":349513188,"following": 1223,"whisper":0,"black":0,"follower":7951}}
=======================
Xiao Li’s USID is: 349513188
The number of fans of Xiao Li’s B station: 7951
Number of followers on the fledgling Xiao Li B station: 1223
=======================
Code is running...
Reference materials
https://blog.csdn.net/weixin_43794311/article/details/133140939
https://blog.csdn.net/qq_55493007/article/details/128421685
Note: This blog is only shared as my own learning record, everyone is welcome to leave a message for discussion~