diff --git a/tristar_monitoring_serial b/tristar_monitoring_serial
new file mode 100755
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+++ b/tristar_monitoring_serial
@@ -0,0 +1,120 @@
+#!/usr/bin/env python
+
+# Based on Morningstar documentation here
+# http://www.morningstarcorp.com/wp-content/uploads/2014/02/TSMPPT.APP_.Modbus.EN_.10.2.pdf
+# and heavily modified version of the script here
+# http://www.fieldlines.com/index.php?topic=147639.0
+
+import sys
+import re
+import time
+counter = 0
+
+script = sys.argv[0]
+host = re.sub(r".*tristar_monitoring_",'',script)
+
+if len(sys.argv) == 2:
+    if sys.argv[1] == "config":
+#        print "host_name %s" % host
+        print "graph_category power"
+       	print "graph_title Solar Charge Controller Info"
+	print "graph_vlabel A bit of all (V, A, C)"
+	print "vPanel.label panel potential (V)"
+	print "vPanel.max   80"
+	print "vBattTerm.label battery potential at terminals (V)"
+        print "vBattTerm.max 32"
+        print "vBattTerm.warning 25:32"
+        print "vBattTerm.critical 24:33"
+#	print "vBattSense.label battery potential sensing (V)"
+#	print "vBattSense.max 32"
+	print "hsTemp.label heat sink temperature (C)"
+	print "hsTemp.max 120"
+        print "hsTemp.warning :60"
+        print "hsTemp.critical :80"
+	# print "battTemp.label battery temperature (C)"
+	# print "battTemp.max 120"
+        # print "battTemp.warning :80"
+        # print "battTemp.critical :100"
+	print "aPanel.label panel current (A)"
+	print "aPanel.max 20"
+#        print "aPanel.warning :15"
+#        print "aPanel.critical :19"
+	print "aBatt.label battery current (A)"
+	print "aBatt.max 20"
+#        print "aBatt.warning :15"
+#        print "aBatt.critical :19"
+        exit(0)
+# import the server implementation
+from pymodbus.client.sync import ModbusSerialClient as ModbusClient
+
+# configure the client logging
+import logging
+logging.basicConfig()
+log = logging.getLogger('./modbus.error')
+log.setLevel(logging.ERROR)
+
+client = ModbusClient(method='rtu',port='/dev/ttyUSB0', baudrate=9600, timeout=1)
+client.connect()
+log.debug(client)
+
+# Define the State list
+state = ['Start', 'Night Check', 'Disconnected', 'Night', 'Fault!', 'MPPT', 'Absorption', 'FloatCharge', 'Equalizing', 'Slave']
+
+# read registers. Start at 0 for convenience
+rr = client.read_holding_registers(0,37,1)
+if rr == None:
+    client.close()
+    log.error("couldn't connect")
+    exit(1)
+
+# for all indexes, subtract 1 from what's in the manual
+#V_PU_hi = rr.registers[0]
+#V_PU_lo = rr.registers[1]
+#I_PU_hi = rr.registers[2]
+#I_PU_lo = rr.registers[3]
+
+#V_PU = float(V_PU_hi) + float(V_PU_lo)
+#I_PU = float(I_PU_hi) + float(I_PU_lo)
+
+v_scale = 96.667 * 2**(-15)
+i_scale = 66.667 * 2**(-15)
+#p_scale = V_PU * I_PU * 2**(-17)
+array_scale = 139.15 * 2**(-15)
+# battery sense voltage, filtered
+battsV = rr.registers[8] * v_scale
+#battsV = ( rr.registers[8] * 96.667 ) / 32768
+#battsSensedV = rr.registers[26] * v_scale
+battsI = rr.registers[12] * i_scale * 4.75
+arrayV = rr.registers[10] * v_scale
+arrayI = rr.registers[11] * i_scale
+#statenum = rr.registers[50]
+hsTemp = rr.registers[14] 
+#rtsTemp = rr.registers[36]
+#outPower = rr.registers[58] * p_scale
+#inPower = rr.registers[59] * p_scale
+#minVb_daily = rr.registers[64] * v_scale
+#maxVb_daily = rr.registers[65] * v_scale
+#minTb_daily = rr.registers[71]
+#maxTb_daily = rr.registers[72]
+#dipswitches = bin(rr.registers[48])[::-1][:-2].zfill(8)
+#led_state = rr.registers
+print "vBattTerm.value %.2f" % battsV
+#print "vBattSense.value %.2f" % battsSensedV
+print "aBatt.value %.2f" % battsI
+#print "battery watts:   %.2f" % (battsV*battsI)
+print "vPanel.value %.2f" % arrayV
+print "aPanel.value %.2f" % arrayI
+#print "array watts:     %.2f" % (arrayV*arrayI)
+print "hsTemp.value %.2f" % hsTemp
+#print "battTemp.value %.2f" % rtsTemp
+#print "state:           %s" % state[statenum]
+#print "out power:       %0.2f" % outPower
+#print "in Power:        %0.2f" % inPower
+#print "min Vb daily:    %0.2f" % minVb_daily
+#print "max Vb daily:    %0.2f" % maxVb_daily
+#print "min Tb daily:    %0.2f" % minTb_daily
+#print "max Tb daily:    %0.2f" % maxTb_daily
+#print "dipswitches:     %s" % dipswitches
+#print "dipswitches:     12345678"
+#print ""
+client.close()