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/* | |
This Arduino sketch sends a GET request to the specified | |
domain and appends a unique DEVICE_ID as a query parameter | |
on the request. After sending the device will go into Deep | |
Sleep mode to conserve power. | |
*/ | |
#include <ESP8266WiFi.h> | |
const char* ssid = "SSID_NAME_HERE"; | |
const char* password = "SSID_PASSWORD_HERE"; | |
const char* device_id = "DEVICE_ID_HERE"; | |
// no protocol here, assuming HTTP | |
const char* host = "DOMAIN_HERE"; | |
const uint16_t port = 80; | |
void setup() { | |
Serial.begin(115200); | |
// We start by connecting to a WiFi network | |
Serial.println(); | |
Serial.println(); | |
Serial.print("Connecting to "); | |
Serial.println(ssid); | |
// Explicitly set the ESP8266 to be a WiFi-client | |
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()); | |
Serial.print("connecting to "); | |
Serial.print(host); | |
Serial.print(':'); | |
Serial.println(port); | |
// Use WiFiClient class to create TCP connections | |
WiFiClient client; | |
if (!client.connect(host, port)) { | |
Serial.println("connection failed"); | |
delay(5000); | |
return; | |
} | |
// Make GET Request with Headers (CloudFront requires this) | |
if (client.connected() ) { | |
client.println((String)"GET /?device_id=" + device_id + " HTTP/1.0"); | |
client.println((String)"Host: " + host); | |
client.println("Connection: keep-alive"); | |
client.println("Cache-Control: max-age=0"); | |
client.println("User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)"); | |
client.println("Accept-Language: en-US,en;q=0.9"); | |
client.println(); | |
} | |
// wait for data to be available | |
unsigned long timeout = millis(); | |
while (client.available() == 0) { | |
if (millis() - timeout > 20000) { | |
Serial.println(">>> Client Timeout !"); | |
client.stop(); | |
delay(5000); | |
return; | |
} | |
} | |
// Read all the lines of the reply from server and print them to Serial | |
Serial.println("receiving from remote server"); | |
// not testing 'client.connected()' since we do not need to send data here | |
while (client.available()) { | |
char ch = static_cast<char>(client.read()); | |
Serial.print(ch); | |
} | |
// Close the connection | |
Serial.println(); | |
Serial.println("closing connection"); | |
client.stop(); | |
// Wait 1 second and then initiate Deep Sleep to conserve battery | |
delay(1000); | |
ESP.deepSleep(0); | |
} | |
void loop(){} |
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