💬 Building an Ethernet Gateway
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@gvorster
hello, i'm working on rfm69 (refactorization and adding features), which will support softspi and w5100, and uses a lot less memory. might be available soon. -
My WizNET (W5100) Ethernet module had to be connected to 5v pin on arduino as the 3.3v would only allow ping but not function properly.
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Thank You to all, who tried to help.
I think, I found the solution:
There was this line in the sketch: "const unsigned long tUpdate=60000; //update interval"
When I changed the time to 6000, it runs as when as the radio was connected.
So it was probably missing some kind of "interrupt", which usually comes from the radio , when it listens to the nodes or so? -
hi everyone,
has the pin setup changed? it looks like it has from the sketch. I used a0, a1 and a2 for the radio.
@Newzwaver Which sketch do you mean? The build page is still using a0, a1, a2 for W5100.
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Ok, I screwed up and downloaded the latest arduino software 1.8.3 and can't get my libraries to work correctly. I am trying to upgrade my sensors to 2.1.1 and rebuild my gateway using a new nano I put together. I am using the5100 connection with the radio wired to a0..... It the 1.8.3 not to be used for the overseas board?
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I have just built a W5100 based Ethernet gateway using a pro mini, NRF24LR and I enabled Soft Signinig - using the latest mysensors github development version 2.2.0-beta I am getting Low on memory messages when I compile and load this - if I disable Signing it does not complain. I have noticed several random crashes with signing enabled however i have secure nodes so need singing support. Is there something I am doing wrong or is the latest dev image causing this to occur. I have Debugging all disabled and burning to a stock 5V 16Mhz device.
Sketch uses 25476 bytes (82%) of program storage space. Maximum is 30720 bytes.
Global variables use 1648 bytes (80%) of dynamic memory, leaving 400 bytes for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur. -
I have just built a W5100 based Ethernet gateway using a pro mini, NRF24LR and I enabled Soft Signinig - using the latest mysensors github development version 2.2.0-beta I am getting Low on memory messages when I compile and load this - if I disable Signing it does not complain. I have noticed several random crashes with signing enabled however i have secure nodes so need singing support. Is there something I am doing wrong or is the latest dev image causing this to occur. I have Debugging all disabled and burning to a stock 5V 16Mhz device.
Sketch uses 25476 bytes (82%) of program storage space. Maximum is 30720 bytes.
Global variables use 1648 bytes (80%) of dynamic memory, leaving 400 bytes for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur. -
I have just built a W5100 based Ethernet gateway using a pro mini, NRF24LR and I enabled Soft Signinig - using the latest mysensors github development version 2.2.0-beta I am getting Low on memory messages when I compile and load this - if I disable Signing it does not complain. I have noticed several random crashes with signing enabled however i have secure nodes so need singing support. Is there something I am doing wrong or is the latest dev image causing this to occur. I have Debugging all disabled and burning to a stock 5V 16Mhz device.
Sketch uses 25476 bytes (82%) of program storage space. Maximum is 30720 bytes.
Global variables use 1648 bytes (80%) of dynamic memory, leaving 400 bytes for local variables. Maximum is 2048 bytes.
Low memory available, stability problems may occur. -
@itbeyond you'll need to find a way to save flash and ram, or use a microcontroller that has more flash and ram.
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@mfalkvidd I this just how it is going to be on W5100 if we enable signing support - we must use a different chip? The Ethernet Gateway has nothing but the basic sketch with LED's enabled and soft signing.
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Atmga328p is not suitable as a gateway if you want ethernet and security. It simply does not have enough storage.
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Atmga328p is not suitable as a gateway if you want ethernet and security. It simply does not have enough storage.
@Anticimex I do agree. It CAN be used, but it is just a bad choice as the ethernet libraries do not leave much space for much else.
ENC28J60 in that aspect is worse than the W5100.
I tried it more like a proof of concept and it does work pretty well just passing data, but I put everything on an ESP8266. OK, WiFi rather than Ethernet but thats OK for me -
@Anticimex I do agree. It CAN be used, but it is just a bad choice as the ethernet libraries do not leave much space for much else.
ENC28J60 in that aspect is worse than the W5100.
I tried it more like a proof of concept and it does work pretty well just passing data, but I put everything on an ESP8266. OK, WiFi rather than Ethernet but thats OK for me -
@mfalkvidd, @Anticimex & @Ed1500,
Thanks I have ordered a Mega 2560 to use as the gateway. I think it would be super helpful to have the specs better identified in the main topic of the Building and Ethernet Gateway (and other Gateway pages) page - maybe a table with suitable controllers for the most common configurations. It would have saved me the hassle and I am sue I will not be the first to run into this. I too was using a 328p with security via serial and did not even think I would have a problem with memory when converting the Ethernet.
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In principle it is the same everywhere: the more libraries you add, the more memory you use as it is like you are writing a longer code. It's the basic of programming and arduino ide is reporting how much memory a sketch uses, so you can see yourself how much more memory is used when you add extra libraries.
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In principle it is the same everywhere: the more libraries you add, the more memory you use as it is like you are writing a longer code. It's the basic of programming and arduino ide is reporting how much memory a sketch uses, so you can see yourself how much more memory is used when you add extra libraries.
@gohan yes I understand perfectly I am a developer and have over 30 years coding experience in about 20 languages. What I find difficult is that there is no detail or documentation on library resource usage so one cannot predetermine the resource requirements when a library or piece of hardware is used. In this great site we have a statement at the top (first sentance) of the Ethernet Gateway page that states "You can build an Ethernet gateway using almost any Arduino model." Well this is not exactly true because if you want to enable some of the library features (ie: signing, and lets face it you should have this enabled if you have any locks or garage doors etc) you will run out of memory in the general models. I am not complaining I just think something so simple should be documented to help other uses look at the right equipment from the outset. In fact all that needs to be written in the first sentence is something as simple as "You can build and Ethernet gateway using almost any Ardunio model however as the Ethernet library uses more resources it would be best to look at a micro controller with greater than 2kb or ram so we recommend a Mega 2560 or similar if you intend to enabled signing or whitelist support."
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@gohan yes I understand perfectly I am a developer and have over 30 years coding experience in about 20 languages. What I find difficult is that there is no detail or documentation on library resource usage so one cannot predetermine the resource requirements when a library or piece of hardware is used. In this great site we have a statement at the top (first sentance) of the Ethernet Gateway page that states "You can build an Ethernet gateway using almost any Arduino model." Well this is not exactly true because if you want to enable some of the library features (ie: signing, and lets face it you should have this enabled if you have any locks or garage doors etc) you will run out of memory in the general models. I am not complaining I just think something so simple should be documented to help other uses look at the right equipment from the outset. In fact all that needs to be written in the first sentence is something as simple as "You can build and Ethernet gateway using almost any Ardunio model however as the Ethernet library uses more resources it would be best to look at a micro controller with greater than 2kb or ram so we recommend a Mega 2560 or similar if you intend to enabled signing or whitelist support."
@itbeyond or if you add external libraries, or if you use debug, or if you change radio, or if, in the future, any of the used libraries increase in size, but not if, in the future, one or more of the included libraries result in smaller flash or ram usage because then it might work. Or if the Arduino IDE changes the compiler flags, thereby affecting the size - either up or down, or if gcc is in a future release changed so code size is affected.
As a programmer, I'm sure you understand that the number of variations increase exponentially, and most of the variables are not under control of the MySensors library.
I agree that a message or table would be nice. I just don't see how it would be feasible to construct and maintain it.
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@gohan yes I understand perfectly I am a developer and have over 30 years coding experience in about 20 languages. What I find difficult is that there is no detail or documentation on library resource usage so one cannot predetermine the resource requirements when a library or piece of hardware is used. In this great site we have a statement at the top (first sentance) of the Ethernet Gateway page that states "You can build an Ethernet gateway using almost any Arduino model." Well this is not exactly true because if you want to enable some of the library features (ie: signing, and lets face it you should have this enabled if you have any locks or garage doors etc) you will run out of memory in the general models. I am not complaining I just think something so simple should be documented to help other uses look at the right equipment from the outset. In fact all that needs to be written in the first sentence is something as simple as "You can build and Ethernet gateway using almost any Ardunio model however as the Ethernet library uses more resources it would be best to look at a micro controller with greater than 2kb or ram so we recommend a Mega 2560 or similar if you intend to enabled signing or whitelist support."
@itbeyond said in 💬 Building an Ethernet Gateway:
"You can build an Ethernet gateway using almost any Arduino model."
I believe that "almost" is the right word, since in fact the basic Ethernet gateway can run on many devices but as the requirements increase you need to step up the HW, I don't see it as a big problem: just as you need more IO pins then a standard UNO you go to a Mega2560.
