xcom_proto 0.2.1

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

pip install xcom-proto

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 xcom_proto import XcomP as param
from xcom_proto import XcomRS232
from xcom_proto 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 xcom_proto import XcomP as param
from xcom_proto import XcomC
from xcom_proto import XcomRS232
from xcom_proto 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