Vergil Cola
/
MQTTGateway2
Fork of my original MQTTGateway
MQTTSManager/MQTTPacket/samples/publish-subscribe.txt@0:a1734fe1ec4b, 2017-04-08 (annotated)
- Committer:
- vpcola
- Date:
- Sat Apr 08 14:43:14 2017 +0000
- Revision:
- 0:a1734fe1ec4b
Initial commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
vpcola | 0:a1734fe1ec4b | 1 | #include "MQTTPacket.h" |
vpcola | 0:a1734fe1ec4b | 2 | |
vpcola | 0:a1734fe1ec4b | 3 | #include <errno.h> |
vpcola | 0:a1734fe1ec4b | 4 | #include <stdlib.h> |
vpcola | 0:a1734fe1ec4b | 5 | #include <string.h> |
vpcola | 0:a1734fe1ec4b | 6 | |
vpcola | 0:a1734fe1ec4b | 7 | #include "EthernetInterface.h" |
vpcola | 0:a1734fe1ec4b | 8 | |
vpcola | 0:a1734fe1ec4b | 9 | |
vpcola | 0:a1734fe1ec4b | 10 | TCPSocketConnection mysock; |
vpcola | 0:a1734fe1ec4b | 11 | |
vpcola | 0:a1734fe1ec4b | 12 | int getdata(char* buf, int count) |
vpcola | 0:a1734fe1ec4b | 13 | { |
vpcola | 0:a1734fe1ec4b | 14 | return mysock.receive(buf, (size_t)count); |
vpcola | 0:a1734fe1ec4b | 15 | } |
vpcola | 0:a1734fe1ec4b | 16 | |
vpcola | 0:a1734fe1ec4b | 17 | int toStop = 0; |
vpcola | 0:a1734fe1ec4b | 18 | |
vpcola | 0:a1734fe1ec4b | 19 | |
vpcola | 0:a1734fe1ec4b | 20 | int main() |
vpcola | 0:a1734fe1ec4b | 21 | { |
vpcola | 0:a1734fe1ec4b | 22 | MQTTPacket_connectData data = MQTTPacket_connectData_initializer; |
vpcola | 0:a1734fe1ec4b | 23 | int rc = 0; |
vpcola | 0:a1734fe1ec4b | 24 | char buf[200]; |
vpcola | 0:a1734fe1ec4b | 25 | int buflen = sizeof(buf); |
vpcola | 0:a1734fe1ec4b | 26 | int msgid = 1; |
vpcola | 0:a1734fe1ec4b | 27 | MQTTString topicString = MQTTString_initializer; |
vpcola | 0:a1734fe1ec4b | 28 | int req_qos = 0; |
vpcola | 0:a1734fe1ec4b | 29 | char* payload = "mypayload"; |
vpcola | 0:a1734fe1ec4b | 30 | int payloadlen = strlen(payload); |
vpcola | 0:a1734fe1ec4b | 31 | int len = 0; |
vpcola | 0:a1734fe1ec4b | 32 | EthernetInterface eth; |
vpcola | 0:a1734fe1ec4b | 33 | |
vpcola | 0:a1734fe1ec4b | 34 | eth.init(); //Use DHCP |
vpcola | 0:a1734fe1ec4b | 35 | eth.connect(); |
vpcola | 0:a1734fe1ec4b | 36 | |
vpcola | 0:a1734fe1ec4b | 37 | rc = mysock.connect("m2m.eclipse.org", 1883); |
vpcola | 0:a1734fe1ec4b | 38 | |
vpcola | 0:a1734fe1ec4b | 39 | data.clientID.cstring = "SendReceive mbed MQTT "; |
vpcola | 0:a1734fe1ec4b | 40 | data.keepAliveInterval = 20; |
vpcola | 0:a1734fe1ec4b | 41 | data.cleansession = 1; |
vpcola | 0:a1734fe1ec4b | 42 | |
vpcola | 0:a1734fe1ec4b | 43 | mysock.set_blocking(true, 1000); /* 1 second Timeout */ |
vpcola | 0:a1734fe1ec4b | 44 | |
vpcola | 0:a1734fe1ec4b | 45 | len = MQTTSerialize_connect(buf, buflen, &data); |
vpcola | 0:a1734fe1ec4b | 46 | rc = mysock.send(buf, len); |
vpcola | 0:a1734fe1ec4b | 47 | |
vpcola | 0:a1734fe1ec4b | 48 | /* wait for connack */ |
vpcola | 0:a1734fe1ec4b | 49 | if (MQTTPacket_read(buf, buflen, getdata) == CONNACK) |
vpcola | 0:a1734fe1ec4b | 50 | { |
vpcola | 0:a1734fe1ec4b | 51 | int connack_rc; |
vpcola | 0:a1734fe1ec4b | 52 | |
vpcola | 0:a1734fe1ec4b | 53 | if (MQTTDeserialize_connack(&connack_rc, buf, buflen) != 1 || connack_rc != 0) |
vpcola | 0:a1734fe1ec4b | 54 | { |
vpcola | 0:a1734fe1ec4b | 55 | printf("Unable to connect, return code %d\n", connack_rc); |
vpcola | 0:a1734fe1ec4b | 56 | goto exit; |
vpcola | 0:a1734fe1ec4b | 57 | } |
vpcola | 0:a1734fe1ec4b | 58 | } |
vpcola | 0:a1734fe1ec4b | 59 | else |
vpcola | 0:a1734fe1ec4b | 60 | goto exit; |
vpcola | 0:a1734fe1ec4b | 61 | |
vpcola | 0:a1734fe1ec4b | 62 | /* subscribe */ |
vpcola | 0:a1734fe1ec4b | 63 | topicString.cstring = "substopic"; |
vpcola | 0:a1734fe1ec4b | 64 | len = MQTTSerialize_subscribe(buf, buflen, 0, msgid, 1, &topicString, &req_qos); |
vpcola | 0:a1734fe1ec4b | 65 | |
vpcola | 0:a1734fe1ec4b | 66 | rc = mysock.send(buf, len); |
vpcola | 0:a1734fe1ec4b | 67 | if (MQTTPacket_read(buf, buflen, getdata) == SUBACK) /* wait for suback */ |
vpcola | 0:a1734fe1ec4b | 68 | { |
vpcola | 0:a1734fe1ec4b | 69 | int submsgid; |
vpcola | 0:a1734fe1ec4b | 70 | int subcount; |
vpcola | 0:a1734fe1ec4b | 71 | int granted_qos; |
vpcola | 0:a1734fe1ec4b | 72 | |
vpcola | 0:a1734fe1ec4b | 73 | rc = MQTTDeserialize_suback(&submsgid, 1, &subcount, &granted_qos, buf, buflen); |
vpcola | 0:a1734fe1ec4b | 74 | if (granted_qos != 0) |
vpcola | 0:a1734fe1ec4b | 75 | { |
vpcola | 0:a1734fe1ec4b | 76 | printf("granted qos != 0, %d\n", granted_qos); |
vpcola | 0:a1734fe1ec4b | 77 | goto exit; |
vpcola | 0:a1734fe1ec4b | 78 | } |
vpcola | 0:a1734fe1ec4b | 79 | } |
vpcola | 0:a1734fe1ec4b | 80 | else |
vpcola | 0:a1734fe1ec4b | 81 | goto exit; |
vpcola | 0:a1734fe1ec4b | 82 | |
vpcola | 0:a1734fe1ec4b | 83 | topicString.cstring = "pubtopic"; |
vpcola | 0:a1734fe1ec4b | 84 | while (!toStop) |
vpcola | 0:a1734fe1ec4b | 85 | { |
vpcola | 0:a1734fe1ec4b | 86 | if (MQTTPacket_read(buf, buflen, getdata) == PUBLISH) |
vpcola | 0:a1734fe1ec4b | 87 | { |
vpcola | 0:a1734fe1ec4b | 88 | int dup; |
vpcola | 0:a1734fe1ec4b | 89 | int qos; |
vpcola | 0:a1734fe1ec4b | 90 | int retained; |
vpcola | 0:a1734fe1ec4b | 91 | int msgid; |
vpcola | 0:a1734fe1ec4b | 92 | int payloadlen_in; |
vpcola | 0:a1734fe1ec4b | 93 | char* payload_in; |
vpcola | 0:a1734fe1ec4b | 94 | int rc; |
vpcola | 0:a1734fe1ec4b | 95 | MQTTString receivedTopic; |
vpcola | 0:a1734fe1ec4b | 96 | |
vpcola | 0:a1734fe1ec4b | 97 | rc = MQTTDeserialize_publish(&dup, &qos, &retained, &msgid, &receivedTopic, |
vpcola | 0:a1734fe1ec4b | 98 | &payload_in, &payloadlen_in, buf, buflen); |
vpcola | 0:a1734fe1ec4b | 99 | printf("message arrived %.*s\n", payloadlen_in, payload_in); |
vpcola | 0:a1734fe1ec4b | 100 | } |
vpcola | 0:a1734fe1ec4b | 101 | |
vpcola | 0:a1734fe1ec4b | 102 | printf("publishing reading\n"); |
vpcola | 0:a1734fe1ec4b | 103 | len = MQTTSerialize_publish(buf, buflen, 0, 0, 0, 0, topicString, payload, payloadlen); |
vpcola | 0:a1734fe1ec4b | 104 | rc = mysock.send(buf, len); |
vpcola | 0:a1734fe1ec4b | 105 | } |
vpcola | 0:a1734fe1ec4b | 106 | |
vpcola | 0:a1734fe1ec4b | 107 | printf("disconnecting\n"); |
vpcola | 0:a1734fe1ec4b | 108 | len = MQTTSerialize_disconnect(buf, buflen); |
vpcola | 0:a1734fe1ec4b | 109 | rc = mysock.send(buf, len); |
vpcola | 0:a1734fe1ec4b | 110 | |
vpcola | 0:a1734fe1ec4b | 111 | exit: |
vpcola | 0:a1734fe1ec4b | 112 | eth.disconnect(); |
vpcola | 0:a1734fe1ec4b | 113 | |
vpcola | 0:a1734fe1ec4b | 114 | return 0; |
vpcola | 0:a1734fe1ec4b | 115 | } |