prometheus-rover-exporter.py

#!/usr/bin/python3
from pymodbus.client.sync import ModbusSerialClient as ModbusClient
from prometheus_client import start_http_server, Gauge
import time

g_state_of_charge = Gauge("renogy_rover_state_of_charge", "Percent state of charge")
g_battery_voltage = Gauge("renogy_rover_battery_voltage", "Battery voltage")

g_controller_temperature_c = Gauge(
    "renogy_rover_controller_temperature_c", "Controller temperature in Celcius"
)
g_battery_temperature_c = Gauge(
    "renogy_rover_battery_temperature_c", "Battery temperature in Celcius"
)
g_controller_temperature_f = Gauge(
    "renogy_rover_controller_temperature_f", "Controller temperature in Fahrenheit"
)
g_battery_temperature_f = Gauge(
    "renogy_rover_battery_temperature_f", "Battery temperature in Fahrenheit"
)

g_solar_voltage = Gauge("renogy_rover_solar_voltage", "Solar volage")
g_solar_current = Gauge("renogy_rover_solar_current", "Solar current in amps")

g_charge_power = Gauge("renogy_rover_charge_power", "Charge power in watts")
g_charge_current = Gauge("renogy_rover_charge_current", "Charge current in amps")
g_charging_state = Gauge("renogy_rover_charging_state", "Charging state")


def get_rover_metrics():
    client = ModbusClient(
        method="rtu",
        port="/dev/ttyUSB0",
        baudrate=9600,
        stopbits=1,
        bytesize=8,
        parity="N",
        retries=15,
    )
    client.connect()

    SOC = client.read_holding_registers(0x100, 2, unit=1)
    g_state_of_charge.set(SOC.registers[0])

    BatVolt = client.read_holding_registers(0x101, 1, unit=1)
    g_battery_voltage.set(float(BatVolt.registers[0] * 0.1))

    ChargeCurrent = client.read_holding_registers(0x102, 1, unit=1)
    g_charge_current.set(float(ChargeCurrent.registers[0] * 0.01))

    Temps = client.read_holding_registers(0x103, 2, unit=1)
    temp_c = (Temps.registers[0] >> 0) & 0xFF
    g_battery_temperature_c.set(temp_c)
    g_battery_temperature_f.set(temp_c * 1.8 + 32)

    temp_c = (Temps.registers[0] >> 8) & 0xFF
    g_controller_temperature_c.set(temp_c)
    g_controller_temperature_f.set(temp_c * 1.8 + 32)

    PanelVolt = client.read_holding_registers(0x107, 1, unit=1)
    g_solar_voltage.set(float(PanelVolt.registers[0] * 0.1))

    PanelCurrent = client.read_holding_registers(0x108, 1, unit=1)
    g_solar_current.set(float(PanelCurrent.registers[0] * 0.01))

    ChargeWatts = client.read_holding_registers(0x109, 1, unit=1)
    g_charge_power.set(ChargeWatts.registers[0])

    ChargingState = client.read_holding_registers(0x120, 1, unit=1)
    g_charging_state.set(ChargingState.registers[0])

    client.close()


if __name__ == "__main__":
    # Start up the server to expose the metrics.
    start_http_server(8080)
    # Generate some requests.
    while True:
        get_rover_metrics()
        time.sleep(10)