I can’t for the life of me figure this out… I can’t get this to compile.
I based my code on https://github.com/synox/Spark-Busstop-Light/blob/master/spark_core/application.cpp where @Coffee uses an enum. Even though he includes application.h at the top that I don’t have, when I paste the code into the Web IDE, it compiles just fine.
However, when I munged the code for my purposes, I get
../57de2889598ee51f77455b1d66f1ecf0703bb94ca54721b3998679a9f9ab/the_user_app.cpp:3:16: error: variable or field 'updateLED' declared void
../57de2889598ee51f77455b1d66f1ecf0703bb94ca54721b3998679a9f9ab/the_user_app.cpp:3:16: error: 'Status' was not declared in this scope
../57de2889598ee51f77455b1d66f1ecf0703bb94ca54721b3998679a9f9ab/the_user_app.cpp:4:1: error: 'Status' does not name a type
make: *** [../57de2889598ee51f77455b1d66f1ecf0703bb94ca54721b3998679a9f9ab/the_user_app.o] Error 1
I’m guessing this is related to the FAQ in http://playground.arduino.cc/Code/Enum. But why does it work for the code I based it on?
//#include "umbrella3.h"
//Originally based on https://github.com/synox/Spark-Busstop-Light/blob/master/spark_core/application.cpp
// ------------- configuration ------------
#define DEBUG true
// possible status list:
enum Status {
clear=0, rain=1, snow=2, thunder=3
};
const char* host = "myhiddenhost.no-ip.com"; //redacted
int port = 80;
const char* query = "/rain";
int led = D7;
long lastTsMilis = 0;
unsigned int nextTime = 0; // next time to contact the server
// Support functions
void updateLED(Status stat) {
switch(stat) {
case clear: RGB.color(0,0,10); break; // dimmed blue
case rain: RGB.color(255,0,0); break; // red
case snow: RGB.color(255,50,0); break; // orange
case thunder: RGB.color(255,150,0); break; // yellow
}
return;
}
Status parseIt(String jsonData) {
int offset = 0;
do {
offset = jsonData.indexOf("rain:", offset);
if(DEBUG) Serial.print("offset: ");
if(DEBUG) Serial.println(offset);
if (offset == -1) {
break;
}
offset += 6; // move to result value
String str = jsonData.substring(offset, offset + 1);
if(DEBUG) Serial.print("result: ");
if(DEBUG) Serial.println(str);
if(str.length() == 0) {
continue;
}
//return (Status) str.toInt();
switch (str.toInt()) {
case 0: return clear; break;
case 1: return rain; break;
default: return thunder; break;
}
} while (offset >= 0);
return thunder;
}
// ------------- HTTP functions --------------
//make http request and return body
TCPClient client;
char buffer[512];
String http_get(char const* hostname, int port, String path) {
if (client.connect(hostname, port)) {
client.print("GET ");
client.print(path);
client.print(" HTTP/1.0\n");
client.print("HOST: ");
client.println(hostname);
client.print("\n");
client.flush();
} else {
Serial.println("connection failed");
client.stop();
return NULL;
}
// Block until first byte is read.
client.read();
for (unsigned int i = 0; i < sizeof(buffer) && client.available(); i++) {
char c = client.read();
if (c == -1) {
break;
}
buffer[i] = c;
}
client.stop();
String response(buffer);
int bodyPos = response.indexOf("\r\n\r\n");
if (bodyPos == -1) {
Serial.println("can not find http reponse body");
return NULL;
}
return response.substring(bodyPos + 4);
}
// Setup
void setup() {
Serial.begin(9600);
pinMode(led, OUTPUT);
RGB.control(true);
RGB.color(0,0,10); // dimmed blue
}
//Looooooooooop forever
void loop() {
void updateLED(Status);
enum Status {
clear=0, rain=1, snow=2, thunder=3
};
if (nextTime > millis()) {
// keep the same color while waiting
return;
}
digitalWrite(led, HIGH);
delay(200);
digitalWrite(led, LOW);
// the timestamp is checked online every 5 min
if(lastTsMilis == 0 || millis() - lastTsMilis > 5 * 60 * 1000 ) {
Serial.println("local time is old, refreshing");
// refresh time online
lastTsMilis = millis();
}
String resp = http_get(host, port, query);
updateLED(parseIt(resp));
// check the color again in 5 seconds:
nextTime = millis() + 5000;
}
I haven’t cleaned this up any or even really thought about the logic, I’m just trying to get this to compile in the Web IDE so I can get to the next step.
you... pay no attention to that bully 
We'll enroll you in night classes, and then you can anticipate Raldus' code syntax errors and warn him before he even starts to type.