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Top Forums Programming NodeMCU ESP8266 Blynk SSL Application for Linux Server Load Averages Post 303043605 by Neo on Saturday 1st of February 2020 11:18:45 PM
Old 02-02-2020
After looking into this, I found some promising iPhone apps which do not share your data with third parties and will test the mosquitto broker to set up a private pub/sub network to send and receive messages to and from these ESP8266 and ESP32 devices.

Quote:
Eclipse Mosquitto is an open source (EPL/EDL licensed) message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1. Mosquitto is lightweight and is suitable for use on all devices from low power single board computers to full servers.

The MQTT protocol provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for Internet of Things messaging such as with low power sensors or mobile devices such as phones, embedded computers or microcontrollers.

The Mosquitto project also provides a C library for implementing MQTT clients, and the very popular mosquitto_pub and mosquitto_sub command line MQTT clients.
I have already set up a mosquitto broker on Ubuntu, the basic security authentication and can send a message from my ESP32 device to the remote Linux server. Will discuss this in another post.
 

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CARDDAVD(8)						    BSD System Manager's Manual 					       CARDDAVD(8)

NAME
carddavd -- Darwin Address Book Server Control Interface SYNOPSIS
carddavd [-hX] [-u username] [-g groupname] [-T twistd] [-f carddavd.plist] DESCRIPTION
carddavd is a front end to the Darwin Address Book Server. The Darwin Address Book Server is a web server which implements the HTTP, WebDAV, WebDAV ACL, and CardDAV protocols. carddavd is a simple tool for starting the server. OPTIONS
-h Displays usage information -X Starts the server but does not daemonize it. -u username Drops privileges to the given username. -g groupname Drops privileges to the given groupname. -f carddavd.plist Specifies the path of the configuration file to read. -T twistd Specifies the path to the twistd binary. FILES
/etc/carddavd/carddavd.plist The Address Book Server configuration file. It is an XML property list specifying server options such as the port to bind to, whether to use SSL, and the names of other configuration files. /etc/carddavd/server.pem PEM-format server keys for use with SSL. /Library/AddressBookServer/Documents The server's document root, which is used as the backing store for the HTTP resources on the server. /var/log/carddavd/access.log The server's access log file, in a format similar to Apache HTTPd's access log. /var/log/carddavd/error.log The server's main log file. /var/run/carddavd.pid The server's process ID file. /usr/share/carddavd Server implementation and support files. SEE ALSO
caldavd(8), httpd(8), serveradmin(8) STANDARDS
carddavd complies with draft-ietf-vcarddav-carddav (CardDAV), RFC 2518 (WebDAV) and RFC 3744 (WebDAV ACL). HISTORY
carddavd was first introduced as part of Darwin 10 and Mac OS 10.6. BUGS
This version of carddavd is still in development and testing. BSD
April 20, 2009 BSD
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