Easily add remote syslog capabilities to your ESP32/ESP8266 projects.

Clone this repo to your Arduino libraries directory. On Linux this is ~/Arduino/libraries/. Alternately you can just drop SimpleSyslog.h in the same directory as your .ino script.

Include the SimpleSyslog library and create a global syslog object with your environment settings:

#include <SimpleSyslog.h>

SimpleSyslog syslog("ArduinoHostname", "ArduinoApp", "192.168.5.222");

Optional settings are port (default: 514) and maximum packet size (default: 128). To use port 5140 with a packet size of 400:

SimpleSyslog syslog("ArduinoHostname", "ArduinoApp", "192.168.5.222", 5140, 400);

Send a syslog message:

// Simple string syntax
syslog.printf(FAC_LOCAL7, PRI_INFO, "This is a simple LOCAL7.INFO syslog packet");

// Advanced printf() syntax supported also
syslog.printf(FAC_USER, PRI_DEBUG, "Uptime: %s", millis());

Valid facilities:

• FAC_USER
• FAC_LOCAL0
• FAC_LOCAL1
• FAC_LOCAL2
• FAC_LOCAL3
• FAC_LOCAL4
• FAC_LOCAL5
• FAC_LOCAL6
• FAC_LOCAL7

Valid severities:

• PRI_EMERGENCY
• PRI_ALERT
• PRI_CRITICAL
• PRI_ERROR
• PRI_WARNING
• PRI_NOTICE
• PRI_INFO
• PRI_DEBUG

You will need to configure your /etc/rsyslog.conf to accept incoming UDP syslog messages. Add these lines to your config and restart rsyslog

$ModLoad imudp
$UDPServerRun 514

You may want to configure a specific rule to handle your messages:

# /etc/rsyslog.d/arduino.conf
template(name="arduino" type="string" string="/var/log/arduino.log")

if ($syslogfacility-text == "local7" or $syslogfacility-text == "user") then {
    action(type="omfile" DynaFile="arduino" FileCreateMode="0644")
    stop
}

Borrowed from jerryr/EspSyslog and improved upon.