mirror of
https://github.com/bicnz/tristar-to-telegraf.git
synced 2025-05-15 16:20:08 -07:00
91 lines
2.5 KiB
Python
91 lines
2.5 KiB
Python
#!/usr/bin/env python3
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# Based on Morningstar documentation here
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# http://www.morningstarcorp.com/wp-content/uploads/2014/02/TSMPPT.APP_.Modbus.EN_.10.2.pdf
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# and heavily modified version of the script here
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# http://www.fieldlines.com/index.php?topic=147639.0
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import time
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counter = 0
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import sys
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import json
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if len(sys.argv) <= 1:
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print ("Usage: read_tsmppt.py <ip address> <host alias>")
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exit(1)
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host = sys.argv[1]
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alias = sys.argv[2]
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# import the server implementation
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from pymodbus.client.sync import ModbusTcpClient as ModbusClient
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# configure the client logging
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import logging
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logging.basicConfig()
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log = logging.getLogger('./modbus.error')
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log.setLevel(logging.ERROR)
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client = ModbusClient(host,502)
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client.connect()
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# Define the State list
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# state = ['Start', 'Night Check', 'Disconnected', 'Night', 'Fault!', 'MPPT', 'Absorption', 'FloatCharge', 'Equalizing', 'Slave']
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# read registers. Start at 0 for convenience
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rr = client.read_holding_registers(0,80,unit=1)
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# for all indexes, subtract 1 from what's in the manual
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V_PU_hi = rr.registers[0]
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V_PU_lo = rr.registers[1]
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I_PU_hi = rr.registers[2]
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I_PU_lo = rr.registers[3]
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V_PU = float(V_PU_hi) + float(V_PU_lo)
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I_PU = float(I_PU_hi) + float(I_PU_lo)
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v_scale = V_PU * 2**(-15)
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i_scale = I_PU * 2**(-15)
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p_scale = V_PU * I_PU * 2**(-17)
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# battery sense voltage, filtered
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battsV = rr.registers[24] * v_scale
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battsSensedV = rr.registers[26] * v_scale
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battsI = rr.registers[28] * i_scale
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arrayV = rr.registers[27] * v_scale
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arrayI = rr.registers[29] * i_scale
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statenum = rr.registers[50]
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hsTemp = rr.registers[35]
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rtsTemp = rr.registers[36]
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outPower = rr.registers[58] * p_scale
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inPower = rr.registers[59] * p_scale
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minVb_daily = rr.registers[64] * v_scale
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maxVb_daily = rr.registers[65] * v_scale
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minTb_daily = rr.registers[71]
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maxTb_daily = rr.registers[72]
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dipswitches = bin(rr.registers[48])[::-1][:-2].zfill(8)
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led_state = rr.registers
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data = {
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"SiteID" : alias,
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"battvolt" : battsV,
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"battsense" : battsSensedV,
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"battamps" : battsI,
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"battwatts" : (battsV*battsI),
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"arrayvolt" : arrayV,
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"arrayamps" : arrayI,
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"arraywatts" : (arrayV*arrayI),
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"heatsinktemp" : hsTemp,
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"batttemp" : rtsTemp,
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"state" : statenum,
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"powerout" : outPower,
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"powerin" : inPower,
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"battvoltmin" : minVb_daily,
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"battvoltmax" : maxVb_daily,
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"batttempmin" : minTb_daily,
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"batttempmax" : maxTb_daily,
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}
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json_str = json.dumps(data)
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print (json_str)
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client.close()
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