xcom_proto 0.2.0

Python library implementing Studer-Innotec Xcom protocol used by Xcom-232i and Xcom-LAN

xcom-protocol

Python library implementing Studer-Innotec Xcom protocol for Xcom-232i and Xcom-LAN.

NOTE: This lib is still WiP, so functionality is still limited, but feel free to create a pull request if you want to contribute ;)

DISCLAIMER: This library is NOT officially made by Studer-Innotec.

The complete official documentation is available on:
Studer-Innotec Download Center -> Software and Updates -> Communication protocol Xcom-232i

Getting Started

Requirements

Hardware

• Xcom-232i or Xcom-LAN connected to your installation
• Xcom-232i connected to PC using USB to RS-232 adapter (1)
• or PC in same subnet as Xcom-LAN device
• PC with at least USB2.0 or faster (works on Raspberry Pi 3/4 as well)

(1) I personally am successfully using an adapter with the PL2303 chipset like this one

Software

• any Linux based OS (x86 / ARM)
• python3 >= 3.9
• python3-pip

Installation

TODO

important:

• make sure you select the USB to RS-232 adapter as the serialDevice, usually on Linux it is /dev/ttyUSB[0-9]
• when using Xcom-LAN make sure it is set up properly and reachable via a static IP in the local network

Examples

Reading values

from xcomProto import XcomP as param
from xcomProto import XcomRS232
from xcomProto import XcomLAN

xcom = XcomRS232(serialDevice="/dev/ttyUSB0", baudrate=115200)
# OR
xcom = XcomLAN("192.168.178.110")

boostValue = xcom.getValue(param.SMART_BOOST_LIMIT)

pvmode = xcom.getValue(param.PV_OPERATION_MODE)
pvpower = xcom.getValue(param.PV_POWER) * 1000 # convert from kW to W
sunhours = xcom.getValue(param.PV_SUN_HOURS_CURR_DAY)
energyProd = xcom.getValue(param.PV_ENERGY_CURR_DAY)

soc = xcom.getValue(param.BATT_SOC)
battPhase = xcom.getValue(param.BATT_CYCLE_PHASE)
battCurr = xcom.getValue(param.BATT_CURRENT)
battVolt = xcom.getValue(param.BATT_VOLTAGE)

print("|".join(
    [boostValue, pvmode, pvpower, sunhours, energyProd, soc, battPhase, battCurr, battVolt]
))

Writing values

IMPORTANT: setValue() has an optional named parameter propertyID which you can pass either:

• XcomC.QSP_UNSAVED_VALUE: writes value into RAM only (default when not specified)
• XcomC.QSP_VALUE: writes value into flash memory; you should write into flash only if you really need it, write cycles are limited!

from xcomProto import XcomP as param
from xcomProto import XcomC
from xcomProto import XcomRS232
from xcomProto import XcomLAN

xcom = XcomRS232(serialDevice="/dev/ttyUSB0", baudrate=115200)
# OR
xcom = XcomLAN("192.168.178.110")

xcom.setValue(param.SMART_BOOST_LIMIT, 100) # writes into RAM
xcom.setValue(param.FORCE_NEW_CYCLE, 1, propertyID=XcomC.QSP_VALUE) # writes into flash memory