diff -ruN observium-default/includes/definitions/mibs/gude.inc.php observium/includes/definitions/mibs/gude.inc.php
--- observium-default/includes/definitions/mibs/gude.inc.php	2022-02-14 11:25:37.298738467 +0100
+++ observium/includes/definitions/mibs/gude.inc.php	2022-02-14 11:44:04.749878392 +0100
@@ -684,4 +684,62 @@
 $config['mibs'][$mib]['states'][$type][1] = array('name' => 'Primary', 'event' => 'ok');
 $config['mibs'][$mib]['states'][$type][2] = array('name' => 'Primary', 'event' => 'alert');
 
+$mib = 'GUDEADS-PDU835X-MIB';
+$config['mibs'][$mib]['enable'] = 1;
+$config['mibs'][$mib]['identity_num'] = '.1.3.6.1.4.1.28507.52';
+$config['mibs'][$mib]['mib_dir'] = 'gude';
+$config['mibs'][$mib]['descr'] = '';
+
+$config['mibs'][$mib]['counter'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'energy',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XAbsEnergyActive',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.3',
+  'scale'   => 1
+);
+
+$config['mibs'][$mib]['sensor'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'power',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XPowerActive',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.4'
+);
+
+$config['mibs'][$mib]['sensor'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'current',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XCurrent',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.5',
+  'scale'   => 0.001
+);
+
+$config['mibs'][$mib]['sensor'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'voltage',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XVoltage',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.6'
+);
+
+$config['mibs'][$mib]['sensor'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'frequency',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XFrequency',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.7',
+  'scale'   => 0.01
+);
+
+$config['mibs'][$mib]['sensor'][] = array(
+  'table'   => 'pdu835XPowerTable',
+  'class'   => 'powerfactor',
+  'descr'   => 'Output %index%',
+  'oid'     => 'pdu835XPowerFactor',
+  'oid_num' => '.1.3.6.1.4.1.28507.52.1.5.1.2.1.8',
+  'scale'   => 0.001
+);
+
 // EOF
diff -ruN observium-default/includes/definitions/os/gude.inc.php observium/includes/definitions/os/gude.inc.php
--- observium-default/includes/definitions/os/gude.inc.php	2022-02-14 11:25:37.710751542 +0100
+++ observium/includes/definitions/os/gude.inc.php	2022-02-14 10:54:08.458802289 +0100
@@ -25,6 +25,7 @@
 );
 //Expert Power Control 1200
 //IPower Control 2x6 M
+//Expert PDU Energy 835X
 $config['os'][$os]['sysDescr_regex'][]      = '/^(?<hardware>.+)$/';
 $config['os'][$os]['mibs'][]                = "GUDEADS-EPC8X-MIB";
 $config['os'][$os]['mibs'][]                = "GUDEADS-EPC2X6-MIB";
@@ -37,6 +38,7 @@
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.23";
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.27";
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.35";
+$config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.52";
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.54";
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.62";
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.65";
@@ -63,6 +65,7 @@
 $config['os'][$os]['sysObjectID'][]         = ".1.3.6.1.4.1.28507.40";
 $config['os'][$os]['mibs'][]                = "GUDEADS-ATS3020-MIB";
 
+
 // Per-HW MIBs and names(hardware)
 
 $model = "gude";
@@ -71,6 +74,7 @@
   '.1.3.6.1.4.1.28507.27'          => array('name' => 'Expert PDU 8310',      'mibs' => array('GUDEADS-PDU8310-MIB')),
   '.1.3.6.1.4.1.28507.35'          => array('name' => 'Expert PDU 818X',      'mibs' => array('GUDEADS-PDU818X-MIB')),
   '.1.3.6.1.4.1.28507.40'          => array('name' => 'ATS 3020 RM',          'mibs' => array('GUDEADS-ATS3020-MIB')),
+  '.1.3.6.1.4.1.28507.52'          => array('name' => 'Expert PDU 835X',      'mibs' => array('GUDEADS-PDU835X-MIB')),
   '.1.3.6.1.4.1.28507.54'          => array('name' => 'Expert PDU 8340',      'mibs' => array('GUDEADS-PDU8340-MIB')),
   '.1.3.6.1.4.1.28507.62'          => array('name' => 'Expert PDU 8311',      'mibs' => array('GUDEADS-PDU8311-MIB')),
   '.1.3.6.1.4.1.28507.65'          => array('name' => 'Expert PDU 8341',      'mibs' => array('GUDEADS-PDU8341-MIB')),