Using EnOcean PI 868 with raspberry PI4

Question

first of all: I'm new to raspberry

I.ve just bought a raspberry PI 4 together with an EnOcean PI 868 module to set up a house automation system. To make it run I've tried the steps described on the element14 site and also used sudo stty -F /dev/ttyAMA0 57600 + hexdump -C < /dev/ttyAMA0 to see at least a single byte received .. with no success.

Of course I've read about the nessessary setup for PI3 like

• enabling serial
• disabling serial console
• adding dtoverlay=pi3-miniuart-bt to /boot/config.txt

and did so. The only differnece I've seen is in /boot/cmdline.txt: tototrials say 'find a line startiing with wc_otg.lpm_enable=0 and remove console=serial0,115200 but I don't have such al line.

Edit

some more things I've found or tried so far:

• the EnOcean PI 868 uses serial UART gpio 14 &15 and web research always brings me to these points, which are in genereal related to PI 3B but seem to be true for PI4 too:
• /dev/ttyAMA0 is by default used for blutooth, /dev/ttyS0 as 'miniuart' for serial
• you can switch devices by adding dtoverlay=pi3-miniuart-bt to /boot/config.txt
• /dev/ttyAMA0 is also used for serial if you disable blutooth completely with dtoverlay=pi3-miniuart-bt to /boot/config.txt
• the simplest way to see if anything is received is by calling stty -F /dev/ttyAMA0 (or ttyS0) 57600 (115200 in other posts) + hexdump -C < /dev/ttyXXX

• tlfong01: Hi @Ingo Leonhardt, Welcome. Ah, let me see. So my dear Rpi newbie, you have a new 2019 Rpi4 and you are following a 2012, ie, 6 years old tutorial for Rpi2? My suggestion is the following: If you have found two cockroaches in any very outdated tutorial, I mean more than 2 years old, remember what the wise guy Warren Buffett says: cnbc.com/2017/08/30/….
• Ingo Leonhardt: @tlfong01 thanks for reading my question but unfortunaltely your comment isn't very helpful. In the comments to he tutorial are several comments mentioning concering serial on P3B and from everyting I have found so far this should all york with PI4 as well.
• tlfong01: I am sorry that I have not been helpful. If beside the problems you mentioned, the seemingly old tutorial can still be good, I need to look at it again, and make an apology to your and Element14. Actually I have been a huge fan of Element14 Hongkong since the Rpi1 days, and so far I have no complaints, except I always tell them that I am just a poor hobbyist doing Micky Mouse projects, therefore cannot afford their a bit expensive industrial grade products. Happy UART programming and cheers.

Answer 1

At least for PI4, if you want to read from EnOcean PI 868 via /dev/ttyS0 you have to enable raw mode too:

stty -F /dev/ttyS0 57600 raw
hexdump -C < /dev/ttyS0 

Shows hex dumps of EnOcean telegrams on stdout

That's a good stating point to write my own implementation

Answer 2

Have you had any success with integrating the Enocean components?

One of the few sources of useful information that I have found is the FHEM instructions. I would like to add a range of Eltako components to Domoticz or Homeassistant. Adding a relay, e.g. Eltako fsr61-230V is not an easy, which is unfortunate, especially since there a few manufacturers in addition to Eltako, which provide the full-range of CE certified components that are not based on some propriety software or protocol.

• user96931: This does not seem to solve the problem: it seems to be a discussion
• Ingo Leonhardt: Yes I'm now able to read and interpret enocean telegrams from switches (the only enocean devices I'm using at the moment). I have built my house automation from scratch (lights and roller shutters only). After I was finally able to read from /dev/ttyS0 the rest was not a problem, the official EnOcean documents are quite good.