The ARM mbed MQTT client library is used to send/receive data to/from AT&T's M2X service (https://m2x.att.com/) using the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).
Dependencies: M2XMQTTClient WNCInterface mbed-rtos mbed minimal-json minimal-mqtt-JMF
main.cpp
- Committer:
- JMF
- Date:
- 2016-10-07
- Revision:
- 3:84f5cf6f2521
- Parent:
- 2:e355d362a2d8
- Child:
- 4:c9290723dce9
File content as of revision 3:84f5cf6f2521:
#include "mbed.h" #include "WNCInterface.h" #define DEBUG #define MBED_PLATFORM #include "minimal-mqtt.h" #include "minimal-json.h" #include "M2XMQTTClient.h" #define CRLF "\n\r" //Device ID: 8bcfff8a8514678f0fc6b56cb0f55c87 //Master Key: 3d1f3c0f42a8c541205f706f62c65330 char deviceId[] = "8bcfff8a8514678f0fc6b56cb0f55c87"; // Device Primary API Key char m2xKey[] = "3d1f3c0f42a8c541205f706f62c65330"; // Your M2X Master API Key char name[] = "Wake Forest"; // Name of current location of datasource const char *hstreamName = "humidity"; const char *tstreamName = "temperature"; double latitude = -37.97884; double longitude = -57.54787; // You can also read those values from a GPS double elevation = 15; const char *streamNames[] = { tstreamName, hstreamName }; int streamNum = sizeof(streamNames)/sizeof(const char *); const int counts[] = { 2, 1 }; const char *ats[] = { "2016-09-12T12:12:12.234Z", "2016-09-12T12:12:12.567Z", "2016-09-12T12:12:12.000Z" }; double values[] = { 27.9, 81.2, 16.1 }; Client client; M2XMQTTClient m2xClient(&client, m2xKey); WNCInterface eth; MODSERIAL pc(USBTX,USBRX,256,256); int main() { int response, cnt=1; double tval = 0.9; double hval = 101.0; pc.baud(115200); pc.printf(CRLF CRLF "M2X MQTT Test starting..." CRLF); eth.init(NULL,&pc); eth.connect(); pc.printf("IP Address: %s" CRLF, eth.getIPAddress()); eth.doDebug(3); while (true) { tval += 0.1; pc.printf("\r\n\r\nSending readings #%d\r\n",cnt++); response = m2xClient.updateStreamValue(deviceId, tstreamName, tval); pc.printf("Sending temperature value: %lf, Response= %d" CRLF, tval, response); hval -= 1.0; pc.printf("Sending humidity value: %lf", hval); response = m2xClient.updateStreamValue(deviceId, hstreamName, hval); pc.printf(", Response= %d" CRLF, response); pc.printf("Calling postDeviceUpdates..."); response = m2xClient.postDeviceUpdates(deviceId, streamNum, streamNames, counts, ats, values); pc.printf(" Response = %d" CRLF, response); pc.printf("Calling updateLocation..."); response = m2xClient.updateLocation(deviceId, name, latitude, longitude, elevation); pc.printf(" Response = %d" CRLF, response); elevation++; delay(6000); } }