IBMIoTClientEthernetExample for WIZwiki-W7500 platform
Dependencies: MQTT WIZnetInterface mbed-src
main.cpp
- Committer:
- hkjung
- Date:
- 2015-09-17
- Revision:
- 4:167fd0256a06
- Parent:
- 2:b1dcfd885d7f
File content as of revision 4:167fd0256a06:
#include "mbed.h" #include "EthernetInterface.h" #include "MQTTClient.h" #include "MQTTEthernet.h" Serial pc(USBTX, USBRX); // Update this to the next number *before* a commit #define __APP_SW_REVISION__ "1" // Configuration values needed to connect to IBM IoT Cloud #define QUICKSTARTMODE 1 #if (QUICKSTARTMODE) #define ORG "quickstart" // For a registered connection, replace with your org #define ID "" // For a registered connection, replace with your id #define AUTH_TOKEN "" // For a registered connection, replace with your auth-token #define TYPE DEFAULT_TYPE_NAME // For a registered connection, replace with your type #else #define ORG "" // For a registered connection, replace with your org #define ID "" // For a registered connection, replace with your id #define AUTH_TOKEN "" // For a registered connection, replace with your auth-token #define TYPE "WIZwiki-W7500" // For a registered connection, replace with your type #endif #if defined(TARGET_WIZwiki_W7500) //#warning "Compiling for mbed WIZwiki-W7500" #include "WIZwiki-W7500.h" #endif #define MQTT_PORT 1883 #define MQTT_TLS_PORT 8883 #define IBM_IOT_PORT MQTT_PORT #define MQTT_MAX_PACKET_SIZE 250 #if defined(TARGET_WIZwiki_W7500) // RGB LED control void off(); void red(); void green(); void blue(); #endif bool quickstartMode = QUICKSTARTMODE; char org[11] = ORG; char type[30] = TYPE; char id[30] = ID; // mac without colons char auth_token[30] = AUTH_TOKEN; // Auth_token is only used in non-quickstart mode bool connected = false; int blink_interval = 0; int connect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { const char* iot_ibm = ".messaging.internetofthings.ibmcloud.com"; char hostname[strlen(org) + strlen(iot_ibm) + 1]; sprintf(hostname, "%s%s", org, iot_ibm); //const char* iot_ibm = "23.246.232.210"; //char hostname[strlen(iot_ibm) + 1]; //sprintf(hostname, "%s", iot_ibm); DEBUG("hostname is %s\r\n", hostname); int rc = ipstack->connect(hostname, IBM_IOT_PORT); if (rc != 0) return rc; // Construct clientId - d:org:type:id char clientId[strlen(org) + strlen(type) + strlen(id) + 5]; sprintf(clientId, "d:%s:%s:%s", org, type, id); DEBUG("clientid is %s\r\n", clientId); // MQTT Connect MQTTPacket_connectData data = MQTTPacket_connectData_initializer; data.MQTTVersion = 3; data.clientID.cstring = clientId; if (!quickstartMode) { data.username.cstring = "use-token-auth"; data.password.cstring = auth_token; } if ((rc = client->connect(data)) == 0) { connected = true; #if defined(TARGET_WIZwiki_W7500) green(); #endif printf("Connected\r\n"); wait(2); } return rc; } int getConnTimeout(int attemptNumber) { // First 10 attempts try within 3 seconds, next 10 attempts retry after every 1 minute // after 20 attempts, retry every 10 minutes return (attemptNumber < 10) ? 3 : (attemptNumber < 20) ? 60 : 600; } void attemptConnect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { int retryAttempt = 0; connected = false; // make sure a cable is connected before starting to connect /* while (!linkStatus()) { wait(1.0f); WARN("Ethernet link not present. Check cable connection\n"); } */ while (connect(client, ipstack) != 0) { #if defined(TARGET_WIZwiki_W7500) red(); #endif int timeout = getConnTimeout(++retryAttempt); WARN("Retry attempt number %d waiting %d\r\n", retryAttempt, timeout); // if ipstack and client were on the heap we could deconstruct and goto a label where they are constructed // or maybe just add the proper members to do this disconnect and call attemptConnect(...) // this works - reset the system when the retry count gets to a threshold if (retryAttempt == 5) NVIC_SystemReset(); else wait(timeout); } } int publish(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { MQTT::Message message; char* pubTopic = "iot-2/evt/status/fmt/json"; char buf[250]; sprintf(buf, "{\"d\":{\"myName\":\"IoT mbed\",\"potentiometer\":%0.3f}}", ain0.read()); //sprintf(buf, "{\"d\":{\"myName\":\"IoT mbed\",\"potentiometer\":%0.4f}}", ain0.read()); message.qos = MQTT::QOS0; message.retained = false; message.dup = false; message.payload = (void*)buf; message.payloadlen = strlen(buf); LOG("Publishing %s\r\n", buf); return client->publish(pubTopic, message); } char* getMac(EthernetInterface& eth, char* buf, int buflen) // Obtain MAC address { strncpy(buf, eth.getMACAddress(), buflen); char* pos; // Remove colons from mac address while ((pos = strchr(buf, ':')) != NULL) memmove(pos, pos + 1, strlen(pos) + 1); return buf; } void messageArrived(MQTT::MessageData& md) { MQTT::Message &message = md.message; char topic[md.topicName.lenstring.len + 1]; sprintf(topic, "%.*s", md.topicName.lenstring.len, md.topicName.lenstring.data); LOG("Message arrived on topic %s: %.*s\r\n", topic, message.payloadlen, message.payload); // Command topic: iot-2/cmd/blink/fmt/json - cmd is the string between cmd/ and /fmt/ char* start = strstr(topic, "/cmd/") + 5; int len = strstr(topic, "/fmt/") - start; if (memcmp(start, "blink", len) == 0) { char payload[message.payloadlen + 1]; sprintf(payload, "%.*s", message.payloadlen, (char*)message.payload); char* pos = strchr(payload, '}'); if (pos != NULL) { *pos = '\0'; if ((pos = strchr(payload, ':')) != NULL) { int blink_rate = atoi(pos + 1); blink_interval = (blink_rate <= 0) ? 0 : (blink_rate > 50 ? 1 : 50/blink_rate); } } } else WARN("Unsupported command: %.*s\r\n", len, start); } int main (void) { pc.baud(115200); #if defined(TARGET_WIZwiki_W7500) // Board init indicator : Init success red(); wait(0.2); blue(); wait(0.2); green(); wait(0.2); off(); wait(0.2); // end of board init indicator #endif quickstartMode = (strcmp(org, "quickstart") == 0); printf("Connecting...\r\n"); #if defined(TARGET_WIZwiki_W7500) blue(); #endif MQTTEthernet ipstack; MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE> client(ipstack); if (quickstartMode) { getMac(ipstack.getEth(), id, sizeof(id)); //printf("getMac: %s\r\n", id); } attemptConnect(&client, &ipstack); if (!quickstartMode) { int rc = 0; if ((rc = client.subscribe("iot-2/cmd/+/fmt/json", MQTT::QOS1, messageArrived)) != 0) WARN("rc from MQTT subscribe is %d\r\n", rc); } blink_interval = 0; int count = 0; while(true) { if (++count == 100) { // Publish a message every second //printf("A0: %0.4f\r\n", ain0.read()); if (publish(&client, &ipstack) != 0) attemptConnect(&client, &ipstack); // if we have lost the connection count = 0; } // Control the LED Blink interval: By Bluemix Node-RED if (blink_interval == 0) off(); else if (count % blink_interval == 0) b = !b; client.yield(10); // allow the MQTT client to receive messages } } #if defined(TARGET_WIZwiki_W7500) // RGB LED control -> DigitalOut void off() { r = g = b = 1; } void red() { r = 0; g = 1; b = 1; } void green() { r = 1; g = 0; b = 1; } void blue() { r = 1; g = 1; b = 0; } #endif