https://github.com/mgdm/mqttdisplay

Displays MQTT messages on a Sure Electronics LCD
https://github.com/mgdm/mqttdisplay

Last synced: about 1 month ago
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Displays MQTT messages on a Sure Electronics LCD

• Host: GitHub
• URL: https://github.com/mgdm/mqttdisplay
• Owner: mgdm
• License: bsd-3-clause
• Created: 2013-10-19T19:26:36.000Z (about 11 years ago)
• Default Branch: master
• Last Pushed: 2015-12-16T13:47:05.000Z (about 9 years ago)
• Last Synced: 2024-10-14T12:36:20.454Z (2 months ago)
• Language: C
• Size: 102 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# MQTTDisplay

This displays MQTT messages on a Sure Electronics LCD display. It requires my

[libsureelec](https://github.com/mgdm/libsureelec) library to speak to the

hardware, and [libmosquitto](http://mosquitto.org) to handle the MQTT

connection.

## Usage

`mqttdisplay -b BROKER -p PORT -d DISPLAY`

BROKER is the hostname of the MQTT broker. Defaults to localhost. PORT is the

MQTT port, and defaults to 1883. DISPLAY is the display device, and defaults to

`/dev/tty.SLAB_USBtoUART`, which is correct for the CP2102 driver on Mac OS X.

You can store the options in a config file, which is currently hard-coded to be

`~/.mqttdisplay`. For example:

```ini

[mqttdisplay]

broker=mqtt.example.org

port=1883

topic=test/example

```

## Credits

This code uses the INIH library for parsing the config file.

https://code.google.com/p/inih/

I also stole the trick to avoid the warning about daemon() being deprecated

from mDNSResponder:

http://www.opensource.apple.com/source/mDNSResponder/mDNSResponder-333.10/mDNSPosix/PosixDaemon.c