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Arduino code to retrieve response from a SugarCRM v7 proxy site, and output 5 LEDs and beep a buzzer (parse output of https://gist.github.com/esimonetti/5d2ea71a90283bbd9c11)
#include <EtherCard.h>
int output_pin = 7;
int output_time_on = 500;
static byte mac_address[] = {0x42,0x42,0x42,0x42,0x42,0x42};
const char url_crm_proxy[] PROGMEM = "your-sugarcrm-proxy-url.com";
const char uri_crm_proxy[] PROGMEM = "/";
byte Ethernet::buffer[700];
static byte current_session;
static uint32_t web_timer;
static uint32_t output_timer;
int previous_response_code = 0;
void activateOutput(int milliseconds_on)
{
if(milliseconds_on > 0)
{
// turning on
output_timer = millis() + milliseconds_on;
digitalWrite(output_pin, HIGH);
}
else
{
// turning off, if the timer has passed
if(millis() > output_timer)
{
digitalWrite(output_pin, LOW);
}
}
}
void updateOutput(int code)
{
// turn all LED off (2 to 6)
for(int i = 2; i <=6; i++) digitalWrite(i, LOW);
// now handle the new code
if(code > 0)
{
if(code > 5) code = 5;
// now incremente of one, because LED pins are 2, 3, 4, 5, 6
code++;
// turn on LED based on code
for(int i = 2; i <= code; i++) digitalWrite(i, HIGH);
}
}
void submitCRMRequest()
{
Serial.print(F("Contacting CRM Proxy ("));
Serial.print(millis());
Serial.println(F(" milliseconds since boot)"));
Stash::prepare(PSTR("GET $F HTTP/1.0" "\r\n" "Host: $F" "\r\n" "Connection: close" "\r\n" "\r\n"), uri_crm_proxy, url_crm_proxy);
current_session = ether.tcpSend();
Stash::cleanup();
}
void parseCRMResponse(String response)
{
// response looks like {"open_cases":"XXX"}, parsing
int jsonOpeningBracket = response.indexOf('{"open_cases":"');
int jsonClosingBracket = response.indexOf('"}');
String parsedResult = response.substring(jsonOpeningBracket + 14, jsonClosingBracket - 1);
int new_response = parsedResult.toInt();
if(previous_response_code < new_response)
{
activateOutput(output_time_on);
}
Serial.print(F("Open Support Cases: "));
Serial.println(new_response);
updateOutput(new_response);
// store new value
previous_response_code = new_response;
}
int freeRam()
{
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
}
void setup ()
{
// from pin 2 to 7 are outputs
for(int i = 2; i <=7; i++)
{
pinMode(i, OUTPUT);
}
Serial.begin(57600);
while(ether.begin(sizeof Ethernet::buffer, mac_address) == 0)
{
Serial.println(F("Failed to access Ethernet controller"));
delay(5000);
}
ether.dhcpSetup();
ether.printIp("Local IP: ", ether.myip);
ether.printIp("Local Gateway: ", ether.gwip);
ether.printIp("Local DNS: ", ether.dnsip);
ether.dnsLookup(url_crm_proxy);
}
void loop ()
{
ether.packetLoop(ether.packetReceive());
const char* reply = ether.tcpReply(current_session);
if (reply != 0)
{
Serial.println(F("Received response from CRM Proxy"));
parseCRMResponse((String)reply);
}
// turn off output if required
activateOutput(0);
// execute crm request if required
if(millis() > web_timer)
{
Serial.print(F("Free Ram: "));
Serial.println(freeRam());
web_timer = millis() + 15000;
submitCRMRequest();
}
}
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