jarak-snmp.ino

/**
* Program untuk jarak
*/

#include <Streaming.h>
#include <Ethernet.h>
#include <SPI.h>
#include <MemoryFree.h>
#include <Agentuino.h>
#include <Flash.h>

static byte mac[]       = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x98 };
static byte ip[]        = { 192, 168, 99, 152 };
static byte subnet[]    = { 255, 255, 255, 0 };
// static byte gateway[] = { 192 , 168, 2, 1 };

const char sysDescr[] PROGMEM       = "1.3.6.1.2.1.1.1.0";
// sesuai file MIB UNITRONS
const char bacaJarak[] PROGMEM      = "1.3.6.1.4.1.80";

// RFC1213 local values
static char locDescr[]              = "Unitron, Integrated Data Center Monitoring";
static int jarak                    = 0;

long duration;

char oid[SNMP_MAX_OID_LEN];
SNMP_API_STAT_CODES api_status;
SNMP_ERR_CODES status;

#define TRIGGER_PIN 2 // ultrasonic
#define ECHO_PIN 3 // ultrasonic


void pduReceived()
{
    SNMP_PDU pdu;

    api_status = Agentuino.requestPdu(&pdu);

    if ( pdu.type == SNMP_PDU_GET && pdu.error == SNMP_ERR_NO_ERROR && api_status == SNMP_API_STAT_SUCCESS ) {

        pdu.OID.toString(oid);

        if ( strcmp_P(oid, sysDescr ) == 0 ) {
            status      = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locDescr);
            pdu.type    = SNMP_PDU_RESPONSE;
            pdu.error   = status;
        }

        // BUAT BACA JARAK
        else if ( strcmp_P(oid, bacaJarak ) == 0 ) {
            digitalWrite(TRIGGER_PIN, LOW);
            delayMicroseconds(2);
            digitalWrite(TRIGGER_PIN, HIGH);
            delayMicroseconds(10);
            digitalWrite(TRIGGER_PIN, LOW);

            duration    = pulseIn(ECHO_PIN, HIGH);
            jarak       = duration*0.034/2;
            status      = pdu.VALUE.encode(SNMP_SYNTAX_INT, jarak);
            pdu.type    = SNMP_PDU_RESPONSE;
            pdu.error   = status;
        }

        else {
            pdu.type    = SNMP_PDU_RESPONSE;
            pdu.error   = SNMP_ERR_NO_SUCH_NAME;
        }

        Agentuino.responsePdu(&pdu);
    }

    Agentuino.freePdu(&pdu);
}

void setup()
{
    Serial.begin(9600);
    Ethernet.begin(mac, ip);
    api_status = Agentuino.begin();

    pinMode(TRIGGER_PIN, OUTPUT);
    pinMode(ECHO_PIN, INPUT);

    if (api_status == SNMP_API_STAT_SUCCESS) {
        Agentuino.onPduReceive(pduReceived);
        delay(10);
        Serial << F("SNMP Agent Initalized...") << endl;
        return;
    }

    delay(10);
    Serial << F("SNMP Agent Initalization Problem...") << status << endl;
}

void loop()
{
    Agentuino.listen();
}