Cross-platform MQTT client example

arch/cpu/cc26xx-cc13xx/dev/batmon-sensor.h

examples/mqtt-client/Makefile

examples/mqtt-client/README.md

examples/mqtt-client/arch/cpu/cc2538/builtin-sensors.c

examples/mqtt-client/arch/cpu/cc2538/builtin-sensors.h

...ples/mqtt-client/arch/cpu/cc26xx-cc13xx/builtin-sensors.c

...ples/mqtt-client/arch/cpu/cc26xx-cc13xx/builtin-sensors.h

...ples/mqtt-client/arch/platform/cc2538dk/Makefile.cc2538dk

examples/mqtt-client/arch/platform/cc2538dk/als-extend.c

examples/mqtt-client/arch/platform/cc2538dk/als-extend.h

...tt-client/arch/platform/cc2538dk/mqtt-client-extensions.c

...nt/arch/platform/openmote-cc2538/Makefile.openmote-cc2538

...nt/arch/platform/openmote-cc2538/mqtt-client-extensions.c

...t-client/arch/platform/srf06-cc26xx/Makefile.srf06-cc26xx

...lient/arch/platform/srf06-cc26xx/mqtt-client-extensions.c

examples/mqtt-client/arch/platform/zoul/Makefile.zoul

...s/mqtt-client/arch/platform/zoul/mqtt-client-extensions.c

examples/mqtt-client/mqtt-client.c

examples/mqtt-client/mqtt-client.h

examples/mqtt-client/project-conf.h