chrishrb / hoval-gateway Goto Github PK

https://www.waveshare.com/2-ch-can-hat.htm

half the price of PICAN2.

For that board :
sudo nano /boot/config.txt

dtparam=spi=on
dtoverlay=mcp2515-can1,oscillator=16000000,interrupt=25
dtoverlay=mcp2515-can0,oscillator=16000000,interrupt=23
dtoverlay=spi-bcm2835-overlay

all informations on https://www.waveshare.com/wiki/2-CH_CAN_HAT
That board works with your code.

How did you get the temperatures of "Zuluft" and "Fortluft"?

Hello,

could you provide this repo as a home assistant addon to be installed on the HA machine directly and be configured via the UI?
This will make an additional raspberry pi or machine where the docker image is running obsolete.
It would be a great advantage for HA users.

Thanks a lot.
CDaxi

Hi, thank you for your work! I have a HOVAL heat pump and I mounted a Raspberry in PICAN2. My question is as follows: do I have to connect the CAN wires coming out of the heat pump directly to the PICAN or can I use the RJ45 output of the HOVAL gateway that I already have? Another question: can you give me the exact command to launch the SCRIPT as it is written in your tutorial? I can't define which file to execute? Thank you
Joël

Hi,

Is there a way to turn on/off the VOC functionality? Aka “air quality control”

Thank you!

The arbitration ID is composed of a sender_id and a receiver_mask:

Explanation using the can id 0x1FE40801

hex:       1    F    E    4    0    8    0    1
binary: 0001 1111 1110 0100 0000 1000 0000 0001
index:    28   24   20   16   12    8    4    0

• [31, 22]: is always 0001 1111 11
• [21, 11]: device id of sender
  b10 0100 0000 1 = 1153, in this example the sender would be a Gateway (GW)
• [10, 0]: receiver mask
  b000 0000 0001 = 1, the receiver is a heat generator (WEZ). I think b111 1111 1111 can be used to address all devices on the bus.

Current implementation

def build_arbitration_id(message_id, priority, device_type, device_id):
    return (message_id << 24) | (priority << 16) | (device_type << 8) | device_id

Should be:

def build_arbitration_id(sender_id, receiver_mask):
    return (0x7F << 22) | (sender_id << 11) | receiver_mask;

Thanks for putting this project together! I'm in the process of getting data from two Hoval UltraSource B Comfort C heat pumps and I am particularly interested in the energy consumption/production datapoints of the systems. These are found in FunctionGroup 10, FunctionNum 1 and DataPoint Ids 23009 and 29050.

Both these datapoints are 32bit unsigned ints per the specification from Hoval. Interestingly, I can't seem to observe any response messages (42) for any of these datapoints. A can dump of the bus only shows messages that seem to be significantly formatted in a different fashion than the usual response messages. Additionally, the values would have to be sent as two messages as well, since this is a 32bit int.

Do you have any pointers or suggestions as to what I should look for?

Hi, thanks for your work! I own a Homevent FR251 with TopTronic E. Can you add the pinout of the RJ45 CAN connector to the readme? I am not sure if GND is on Pin 3, 7 or both. Thanks!

Hey,

I'm currently working on my own hoval gateway for TTE-WEZ. (https://github.com/abichinger/esp_canbus) and
I'm trying to figure out how hoval puts the can ID together.

According to your code

def build_arbitration_id(message_id, priority, device_type, device_id):
    return (message_id << 24) | (priority << 16) | (device_type << 8) | device_id

the device_id should be: can_id & 0xFF and the device_type should be (can_id >> 8) & 0xFF.

I found three can IDs on my bus and after sending some SET_REQUESTS from the control modules, I was able to assign the devices.

• TT-BM (control module): 0x1FE09001 -> device_type = 0x90, device_id = 0x01
• TT-BM (control module): 0x1FE00801 -> device_type = 0x08, device_id = 0x01
• TTE-WEZ (heat generator): 0x1FC00FFF -> device_type = 0x0F, device_id = 0xFF

I would expect both control modules to have the same device_type.
Have I made a mistake or is the can ID composed differently?

More information

Devices listed on the GUI of my control module with device IDs:

• TTE-BM (18)
• TTE-BM (1)
• TTE-WEZ (1)

Device types according to https://raw.githubusercontent.com/wladwnt/CAN-Gateway/master/Operating_manual.pdf (page 34)

• TTE-WEZ: 0
• TTE-HV: 8
• TTE-BM: 16

Hallo,
Python ist zwar nicht meine Liebling, aber lesen geht gerade noch.
wie bestimmt man den Device Typ & Id für meine Wärmepumpenheizung.
will eher mit einem ESP32/ESP8266 und einem Canbus-Modul unter C++ die Anlage auslesen ggf. steuern.
Bin selber Programmierer aber CANBUS Neuling.
Wie wäre ein Request für einen speziellen DatenPunkt aussehen?
Schaut ja sehr analog Modbus aus.

Danke schon mal vorab für deine Hilfe

https://github.com/coryjfowler/MCP_CAN_lib/blob/master/examples/CAN_send/CAN_send.ino