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blazini36 wrote:

The world has changed, $50 is no longer $50.

That is very true.

tommylight wrote:

Sorry but i do not use RPI's at all,and that will not change untill their price drops back to under 50$.
 

They'll never be under $50 again. The world has changed, $50 is no longer $50.

wow, ok, in germany/amazon (not the cheapest):

Pi5/4GB = 67,84€
PI4/2GB = 47,80€

meister wrote:

tommylight wrote:

Sorry but i do not use RPI's at all,and that will not change untill their price drops back to under 50$.

Sorry, why not ? i like the RPI's, especially via SPI

It is 150 Euro here, be it 4 or 5, i can get a full used PC for that money.

yathish wrote:

Hi @tommylight, thankyou for your insight.
Now i want to expand my inputs and outputs in raspberry pi 5, can you suggest me how to expand my i/o and if there is any solution can you also tell me how to configure HAl

Refer to this post forum.linuxcnc.org/18-computer/53136-can...g-step-pulses#304365

tommylight wrote:

Sorry but i do not use RPI's at all,and that will not change untill their price drops back to under 50$.

Sorry, why not ? i like the RPI's, especially via SPI

Now i want to expand my inputs and outputs in raspberry pi 5, can you suggest me how to expand my i/o and if there is any solution can you also tell me how to configure HAl. I do not want to use MESA board as it is expensive, can someone suggest something cheaper?

cornholio wrote:

No don't use a hub.

Linuxcnc-rio is awesome, with a single WT32-ETH0 and a direct cable connection and inexpensive FPGA you can do 4 axis easily and way more.

i think he will use ethernet for wiring like with ethercat.


 

Sorry but i do not use RPI's at all,and that will not change untill their price drops back to under 50$.

Hi @tommylight, thankyou for your insight.
Now i want to expand my inputs and outputs in raspberry pi 5, can you suggest me how to expand my i/o and if there is any solution can you also tell me how to configure HAl

No don't use a hub.

Linuxcnc-rio is awesome, with a single WT32-ETH0 and a direct cable connection and inexpensive FPGA you can do 4 axis easily and way more.

Awesome used all of elovalo bits to setup an Rpi5 with Pineberry NVME hat, works great.

Can you tell me how to configure HAl and ESP32 if I have to build it for just 1 axis?

Using ethernet hub or switch will add a lot to network latency, so it might not work at all, even if everything else works.
Never tried with a hub, but i do have a switch that works with Mesa boards for days without issues.
Still, i never use a switch on production machines, the risk is to big.
-
Network hub = old, any packet sent to any pc wired to it will be sent to all connected PC's.
Network switch = new, any packet sent will be sent only to the PC with the IP address contained in that packet.

in principle, yes,
but you would have to build the hal component in such a way that the ethernet packets are sent and received in parallel,
otherwise it takes too long.

EDIT:
but since udp is used, this can lead to collisions.
maybe send with minimal delay and then wait for the responses