1. Hardware Setup (ELM327)
   a. Most cheap china replicas will not work because the "AT PP" command is not implemented. A purchase recommendation is as follows: https://www.totalcardiagnostics.com/elm327
   b. It is recommended to order a matching obd2 socket (16pol) to connect the can adapter
   c. Connect the CAN-High cable 6, the CAN-Low cable 14 and CAN signal ground 5 to the hpsu, Power on the CAN-Side is not needet

2. Software Setup (ELM327)
   a. get the id from the usb elm interface: ls /dev/serial/by-id/
   b. apt-get install python-pika python3-pika python-configparser python3-serial
   c. git clone https://github.com/Spanni26/pyHPSU
   d. cd pyHPSU
   e. chmod +x install.sh
   f. ./install.sh
   g. test the communication (exchange the id)
   python3 /usr/bin/pyHPSU_dirty.py -v 2 -d elm327 --port /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_-if00-port0 -c t_hc_set -o CSV

There are the following different possibilities of data export

2.1 Data Export to CSV:
a. python3 /usr/bin/pyHPSU_dirty.py -v 2 -d elm327 --port /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_-if00-port0 -c t_hc_set -o CSV

2.2 Data Export to Emoncms
a. cp -r pyHPSU/etc/pyHPSU/EMONCMS.ini /etc/pyHPSU/emoncms.ini
b. Register and note the API key:https://emoncms.org
c. Enter Api key in /etc/pyHPSU/emoncms.ini
d. sample config:

     [config]  
     apikey=xxxxxxxxxxxxxxxxxxxxxxxxxx  
     emoncms_url=https://emoncms.org  
     [node]  
     Node_30=flow_rate,mode,t_ext,t_hc_set,bpv,posmix,t_dhw_set,door_ot1,t_v1,t_r1,tliq2,t_vbh,t_dhw1,ta2,ehs,qdhw,qch,qchhp,qwp 
     

e. run pyHPSU:
/usr/share/pyHPSU/bin/pyHPSU.py -v 1 -d elm327 --port /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_-if00-port0 -o CLOUD -u EMONCMS
3. Data Export to FHEM
a. Create Dummy on FHEM Server:
define HPSU dummy
b. run pyHPSU:
python3 /usr/bin/pyHPSU.py -o FHEM -d elm327 -p /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_-if00-port0 -c t_hc
4. Daemon Mode
a. apt-get install rabbitmq-server
b. Check if the service is running: sudo rabbitmqctl status
c. you can activate a management plugin, so that the access to the rabbitMQ server via webinterface port 15672 is possible. The
plugin is not needed for operation.
rabbitmq-plugins enable rabbitmq_management
rabbitmqctl restart
d. cp hpsud.service /etc/systemd/system/
e. systemctl enable hpsud.service
f. systemctl --system daemon-reload
g. check the status: systemctl status hpsud.service

More information at: (italian language) http://cercaenergia.forumcommunity.net/?t=58409485

A possible HW set-up guide (italian language):

• Pompa di calore Rotex HPSU Compact hack: prima parte
• Pompa di calore Rotex HPSU Compact hack: seconda parte
• Pompa di calore Rotex HPSU Compact hack: terza parte

Needs:

• python
• python-pika
• python-serial
• python-configparser
• python-can
• python-requests
• python3
• python3-serial
• python3-pika
• python3-requests
• python3-mysql.connector

If a database should be used simply create a mysql DB with collation "utf8_bin", edit the pyhpsu.conf and select "DB" as output type Configure it in /etc/pyHPSU/pyhpsu.conf