M5ATOM Lite로 HTTP POST하는 간단한 샘플 코드

소개

준비

샘플 코드

#define FASTLED_INTERNAL

#include <M5Atom.h>
#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";

void post() {
  HTTPClient http;
  http.begin("http://httpbin.org/post");
  http.addHeader("Content-Type", "application/json");
  http.POST("{\"title\": \"test\"}");
  Serial.println(http.getString());
  http.end();
}

void setup() {
  M5.begin();
  Serial.begin(115200);

  Serial.print("WiFi connecting.");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(100);
  }

  post();
}

void loop() { /* 起動時のみPOSTするのでここは何も書かない */ }

동작 확인

21:21:34.800 -> ets Jun  8 2016 00:22:57
21:21:34.800 -> 
21:21:34.800 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
21:21:34.800 -> configsip: 188777542, SPIWP:0xee
21:21:34.800 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
21:21:34.800 -> mode:DIO, clock div:1
21:21:34.800 -> load:0x3fff0018,len:4
21:21:34.800 -> load:0x3fff001c,len:1044
21:21:34.800 -> load:0x40078000,len:8896
21:21:34.800 -> load:0x40080400,len:5816
21:21:34.800 -> entry 0x400806ac
21:21:35.174 -> WiFi connecting.....{
21:21:39.147 ->   "args": {}, 
21:21:39.147 ->   "data": "{\"title\": \"test\"}", 
21:21:39.147 ->   "files": {}, 
21:21:39.147 ->   "form": {}, 
21:21:39.147 ->   "headers": {
21:21:39.147 ->     "Accept-Encoding": "identity;q=1,chunked;q=0.1,*;q=0", 
21:21:39.147 ->     "Content-Length": "17", 
21:21:39.147 ->     "Content-Type": "application/json", 
21:21:39.147 ->     "Host": "httpbin.org", 
21:21:39.147 ->     "User-Agent": "ESP32HTTPClient", 
21:21:39.147 ->     "X-Amzn-Trace-Id": "Root=1-600ac351-64fc92271caf27324b271307"
21:21:39.194 ->   }, 
21:21:39.194 ->   "json": {
21:21:39.194 ->     "title": "test"   <-- 送ったデータがレスポンスに入ってる！
21:21:39.194 ->   }, 
21:21:39.194 ->   "origin": "153.209.83.152", 
21:21:39.194 ->   "url": "http://httpbin.org/post"
21:21:39.194 -> }