Daniel Knox
Example MQTT for CO657. You should modify your client ID! Broker and Topic can be adjusted to situation.
Dependencies: C12832 MQTT_MbedOS
Revision 0:35df42ee93ed, committed 2016-11-01
- Comitter:
- azazeal88
- Date:
- Tue Nov 01 22:14:54 2016 +0000
- Commit message:
- Initial Commit
Changed in this revision
diff -r 000000000000 -r 35df42ee93ed .gitignore --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Tue Nov 01 22:14:54 2016 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
diff -r 000000000000 -r 35df42ee93ed C12832.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832.lib Tue Nov 01 22:14:54 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/askksa12543/code/C12832/#990d5eec2ef6
diff -r 000000000000 -r 35df42ee93ed MQTT.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MQTT.lib Tue Nov 01 22:14:54 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/azazeal88/code/MQTT_MbedOS/#a84464ad0b6f
diff -r 000000000000 -r 35df42ee93ed README.md --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Tue Nov 01 22:14:54 2016 +0000 @@ -0,0 +1,89 @@ +# Getting started with Blinky on mbed OS + +This is a very simple guide, reviewing the steps required to get Blinky working on an mbed OS platform. + +Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). + +## Get the example application! + +From the command line, import the example: + +``` +mbed import mbed-os-example-blinky +cd mbed-os-example-blinky +``` + +### Now compile + +Invoke `mbed compile` specifying the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5: + +``` +mbed compile -m K64F -t ARM +``` + +Your PC may take a few minutes to compile your code. At the end you should get the following result: + +``` +[snip] ++----------------------------+-------+-------+------+ +| Module | .text | .data | .bss | ++----------------------------+-------+-------+------+ +| Misc | 13939 | 24 | 1372 | +| core/hal | 16993 | 96 | 296 | +| core/rtos | 7384 | 92 | 4204 | +| features/FEATURE_IPV4 | 80 | 0 | 176 | +| frameworks/greentea-client | 1830 | 60 | 44 | +| frameworks/utest | 2392 | 512 | 292 | +| Subtotals | 42618 | 784 | 6384 | ++----------------------------+-------+-------+------+ +Allocated Heap: unknown +Allocated Stack: unknown +Total Static RAM memory (data + bss): 7168 bytes +Total RAM memory (data + bss + heap + stack): 7168 bytes +Total Flash memory (text + data + misc): 43402 bytes +Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin +``` + +### Program your board + +1. Connect your mbed device to the computer over USB. +1. Copy the binary file to the mbed device . +1. Press the reset button to start the program. + +You should see the LED of your platform turning on and off. + +Congratulations if you managed to complete this test! + +## Export the project to Keil MDK and debug your application + +From the command line, run the following command: + +``` +mbed export -m K64F -i uvision +``` + +To debug the application: + +1. Start uVision. +1. Import the uVision project generated earlier. +1. Compile your application and generate an `.axf` file. +1. Make sure uVision is configured to debug over CMSIS-DAP (From the Project menu > Options for Target '...' > Debug tab > Use CMSIS-DAP Debugger). +1. Set breakpoints and start a debug session. + + + +## Troubleshooting + +1. Make sure `mbed-cli` is working correctly and its version is greater than `0.8.9` + + ``` + mbed --version + ``` + + If not, you can update it easily: + + ``` + pip install mbed-cli --upgrade + ``` + +2. If using Keil MDK, make sure you have a license installed. [MDK-Lite](http://www.keil.com/arm/mdk.asp) has a 32KB restriction on code size.
diff -r 000000000000 -r 35df42ee93ed img/uvision.png Binary file img/uvision.png has changed
diff -r 000000000000 -r 35df42ee93ed main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Nov 01 22:14:54 2016 +0000
@@ -0,0 +1,77 @@
+#include "mbed.h"
+#include "C12832.h"
+#include "MQTTEthernet.h"
+#include "MQTTClient.h"
+
+// LCD Pinout
+C12832 lcd(D11, D13, D12, D7, D10);
+
+// MQTT Variables
+char* MqttHostname = "broker.hivemq.com";
+int MqttPort = 1883;
+char* MqttTopic = "mbed-sample";
+char* MqttClientId = "changeme";
+
+int main()
+{
+ // Clear LCD and print a welcome message from row 0, col 0.
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Example MQTT client\n");
+
+ // Brings up the network interface
+ MQTTEthernet eth = MQTTEthernet();
+ const char *ip = eth.get_ip_address();
+
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("IP address is: %s\n", ip ? ip : "No IP");
+
+ // Create Mbed Client Interface
+ MQTT::Client<MQTTEthernet, Countdown> client = MQTT::Client<MQTTEthernet, Countdown>(eth);
+
+ // Create TCP connection
+ eth.open(eth.getEth());
+ int rc = eth.connect(MqttHostname, MqttPort);
+ lcd.printf("TCP Status: %s\n", (rc == 0) ? "Success" : "Failure");
+
+ // Wait for a short length of time to allow user to see output messages.
+ Thread::wait(2000);
+
+ if(rc == 0){
+
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("Starting MQTT Client");
+
+ MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
+ data.MQTTVersion = 3;
+ data.clientID.cstring = MqttClientId;
+ rc = client.connect(data);
+
+ lcd.cls();
+ lcd.locate(0,0);
+ lcd.printf("MQTT Client: %s\n", (rc == 0) ? "Connected" : "Failed");
+
+ while(rc == 0){
+ MQTT::Message message;
+
+ // QoS 0
+ char buf[100];
+ sprintf(buf, "Hello World!");
+ message.qos = MQTT::QOS0;
+ message.retained = false;
+ message.dup = false;
+ message.payload = (void*)buf;
+ message.payloadlen = strlen(buf)+1;
+ rc = client.publish(MqttTopic, message);
+
+ Thread::wait(5000);
+
+ }
+ }
+
+ // It is good practice to close the socket
+ eth.disconnect();
+}
+
diff -r 000000000000 -r 35df42ee93ed mbed-os.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Tue Nov 01 22:14:54 2016 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#e2617cc0e17f5c3fc2bae6a589c9bcfd3d1a717b