108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
#include "Adafruit_MQTT.h"
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#include "Adafruit_MQTT_CC3000.h"
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#include <Adafruit_Watchdog.h>
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Adafruit_MQTT_CC3000::Adafruit_MQTT_CC3000(Adafruit_CC3000 *cc3k, char *server, uint16_t port, char *user, char *key) : Adafruit_MQTT(server, port, user, key), cc3000(cc3k)
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{
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// nothin doin
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}
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int8_t Adafruit_MQTT_CC3000::connect(void) {
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uint32_t ip = 0;
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Watchdog.reset();
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// look up IP address
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if (serverip == 0) {
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// Try looking up the website's IP address using CC3K's built in getHostByName
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Serial.print(servername); Serial.print(F(" -> "));
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uint8_t dnsretries = 5;
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Watchdog.reset();
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while (ip == 0) {
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if (! cc3000->getHostByName(servername, &ip)) {
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Serial.println(F("Couldn't resolve!"));
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dnsretries--;
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Watchdog.reset();
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}
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//Serial.println("OK"); Serial.println(ip, HEX);
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if (!dnsretries) return -1;
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delay(500);
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}
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serverip = ip;
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cc3000->printIPdotsRev(serverip);
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Serial.println();
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}
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Watchdog.reset();
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// connect to server
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Serial.println("Connecting to TCP");
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mqttclient = cc3000->connectTCP(serverip, portnum);
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uint8_t len = connectPacket(buffer);
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Serial.println("MQTT connection packet:");
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for (uint8_t i=0; i<len; i++) {
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if (isprint(buffer[i]))
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Serial.write(buffer[i]);
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else
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Serial.print(" ");
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Serial.print(" [0x");
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if (buffer[i] < 0x10)
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Serial.print("0");
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Serial.print(buffer[i],HEX);
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Serial.print("], ");
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if (i % 8 == 7) Serial.println();
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}
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Serial.println();
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if (mqttclient.connected()) {
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uint16_t ret = mqttclient.write(buffer, len);
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//Serial.print("returned: "); Serial.println(ret);
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if (ret != len) return -1;
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} else {
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Serial.println(F("Connection failed"));
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return -1;
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}
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Serial.println(F("Reply:"));
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len = readPacket(buffer, 4, CONNECT_TIMEOUT_MS);
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for (uint8_t i=0; i<len; i++) {
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Serial.write(buffer[i]); Serial.print(" [0x"); Serial.print(buffer[i], HEX); Serial.print("], ");
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}
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Serial.println();
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if (len != 4) return -1;
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if ((buffer[0] == (MQTT_CTRL_CONNECTACK << 4)) && (buffer[1] == 2)) {
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// good packet structure
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return buffer[3];
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}
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return -1;
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}
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uint16_t Adafruit_MQTT_CC3000::readPacket(uint8_t *buffer, uint8_t maxlen, uint16_t timeout) {
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/* Read data until either the connection is closed, or the idle timeout is reached. */
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uint16_t len = 0;
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unsigned long lastRead = millis();
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while (mqttclient.connected() && ((millis() - lastRead) < timeout)) {
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while (mqttclient.available()) {
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char c = mqttclient.read();
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Watchdog.reset();
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buffer[len] = c;
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len++;
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if (len == maxlen) { // we read all we want, bail
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return len;
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}
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lastRead = millis();
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}
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}
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return len;
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}
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int32_t Adafruit_MQTT_CC3000::close(void) {
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return mqttclient.close();
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}
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