mosquiSub.c File Reference

A very simple MQTT subsciber. More...

#include <signal.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <mosquitto.h>
#include <getopt.h>

Variables
char	clientId [30]
	Id of this MQTT subscriber. More...
char	mqttHost [68]
	The MQTT broker URL or name. More...
int	mqttPort
	MQTT port 1883.
char	topicS [60]
	Root of topics to log.

Detailed Description

A very simple MQTT subsciber.

Copyright  (c)  2017   Albrecht Weinert
weinert-automation.de      a-weinert.de
 
    /         /      /\
   /         /___   /  \      |
   \        /____\ /____\ |  _|__
    \  /\  / \    /      \|   |
     \/  \/   \__/        \__/|_                                 

cross-compile by:

make PROGRAM=mosquiSub TARGET=meterPi clean all 

program respectively transfer to target machine by:

make PROGRAM=mosquiSub TARGET=raspi61 FTPuser=pi:piSecret progapp 

The building of the application is governed by the make include makeProg_mosquiSub_settings.mk:

# A makefile include for raspberry projects 
# program include for one program
# makeProg_mosquiSub_settings.mk
# Copyright  2017  Albrecht Weinert    < a-weinert.de >
 
MAKE_INCLUDE_PROGRAM  = mosquiSub
MAKE_PROGRAM_LAST_CHANGE = '$Date: 2021-02-02 18:11:02 +0100 (Di, 02 Feb 2021) $ '
MAKE_PROGRAM_REVISION = '$Revision: 236 $ '
 
ifndef COPYRIGHT_YEAR
$(error includefile $(MAKE_INCLUDE_PROGRAM) used directly.)
endif
 
# PROGRAM or MAIN_F might have been given in wrong case (at least on Windows)
override MAIN_F = $(MAKE_INCLUDE_PROGRAM)
 
# An optional short multiline description of this program's specifica.
# May be empty. But, do not change the three lines define endef and export.
define PROG_DES_TEXTT
Program mosquiSub
 
This program is a first example of a MQTT subscriber as well as a minimal
test program to see whats going on with subjects labExp/sweetHome/#. 
endef
export PROG_DES_TEXT
 
extraLDFLAGS = -lmosquitto
# extraSOURCES = weRasp/weUtil.c weRasp/weShareMem.c weRasp/weCGIajax.c
# FTPdir = var/www/cgi
 

Variable Documentation

mqttHost

char mqttHost[68]

The MQTT broker URL or name.

May be set by option –mqttHost meterPi or –mqttBroker 192.168.178.87

default: localhost MQTTBroker (currently localhost !)

clientId

char clientId[30]

Id of this MQTT subscriber.

MQTT client ID.