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+# Configuration for the Netgear RN3138 / RNR-4B NAS 
+#
+# Chassis identification labels:
+# NETGEAR Advanced Network Storage Model No. RNR-4B
+# Model Name: RN3138
+#
+# Identification from DMI:
+# dmidecode -s system-manufacturer: NETGEAR
+# dmidecode -s system-product-name: ReadyNAS 3138
+# dmidecode -s system-version: 03/05/2015 ReadyNAS 3130 V0.9
+# dmidecode -s system-sku-number: RN3138
+#
+# BIOS:
+#
+# dmidecode -s bios-version: 5.6.5
+# dmidecode -s bios-release-date: 03/05/2015
+# 
+# Monitoring chipset
+# Chip: IT8732F
+# Driver: it87
+# 
+
+chip "it8732-isa-*"
+
+  ### Voltage sense
+  ### The labels and equations reverse-engineered by measuring voltages on the board, finding
+  ### voltage dividers and comparing the voltages to what is reported in the BIOS.
+  ###
+  ### No datasheet for IT8732F has been discovered so its unknown what the recommended wiring is.
+  ### VIN[0-7] pinout has been taken from IT8782F datasheet it seems to match.
+
+  # These go straight to the IT8732F, confirmed in BIOS Setup
+  label in0 "Vcore"
+  label in1 "DDR 1.5V"
+
+  # These looks to be a second 3.3V input with a 10k/20k divider
+  label in2 "+3.3V_2"
+  compute in2 @*((10/20)+1), @/((10/20)+1)
+
+  # in3 is labeled as +3.3V by the it87 driver, supposedly wired internally inside the chip
+  # The reported value is halved
+  compute in3 @*2, @/2
+
+  # Resistors could not be reverse engineered from the board, a simple scaling factor was calculated
+  label in4 "+12V"
+  compute in4 @*6.59, @/6.59
+
+  # in5 and in6 are unknown, one of them is most likely the +5V rail but the +5V divider voltage 
+  # and the measured voltages do not match.
+  # Specifically, the +5V divider outputs 1.86V but in5 reads 1.44V and in6 reads 2.78V
+
+  # in7 is labeled as 3VSB by the it87 driver
+  # The reported value is halved
+  compute in7 @*2, @/2
+
+  # in8 is labeled as Vbat by the it87 driver, probably wired internally inside the chip
+  # The reported value looks to be nonsense as it reports 1.6V without a battery inserted.
+  # Ignore for now
+  ignore in8
+
+  # Establish a 10% tolerance range for alarms
+  set in0_min 1.0 * 0.95
+  set in0_max 1.0 * 1.05
+  set in1_min 1.5 * 0.95
+  set in1_max 1.5 * 1.05
+  set in2_min 3.3 * 0.95
+  set in2_max 3.3 * 1.05
+  set in3_min 3.3 * 0.95
+  set in3_max 3.3 * 1.05
+  set in4_min 12 * 0.95
+  set in4_max 12 * 1.05
+  
+  set in7_min 3.3 * 0.95
+  set in7_max 3.3 * 1.05
+  
+
+  ### Temperatures
+  ### The BIOS reports only one temperature sensors and labels it "System temperature3", it's obviously temp3
+  ### Other temp inputs are not wired
+  ignore temp1
+  ignore temp2
+  label temp3 "System temperature"
+
+  set temp3_max 50
+
+  
+  ###
+  ### System contains only chassis fans, confirmed in BIOS
+  ### The RPM reported for PWM value of 128 is around 5500 RPM
+  label fan1 "Chassis fan 1"
+  label fan2 "Chassis fan 2"
+  label fan3 "Chassis fan 3"
+
+  # Not wired
+  ignore intrusion0