RS485 & ENC28J60 gateway

[dzjr]

Hello MySensor friends;

I have made a RS-485 tot ethernet gateway with a ENC28J60 Ethernet adapter, and it is working good.

Only when i load it to the Arduino i got a warning that 97% of the dynamic memory is used.
Is it a problem for a good working gateway?

All the not direct needed parts i comment out, including the debug.

The message: It is in dutch....

De schets gebruikt 27498 bytes (85%)  programma-opslagruimte. Maximum is 32256 bytes.
Globale variabelen gebruiken 1998 bytes (97%) van het dynamisch geheugen. Resteren 50 bytes voor lokale variabelen. Maximum is 2048 bytes.
Weinig geheugen beschikbaar, er kunnen zich stabiliteitsproblemen voordoen

The sketch:

// Enable debug prints to serial monitor
//#define MY_DEBUG

// Enable RS485 transport layer
#define MY_RS485

// Define this to enables DE-pin management on defined pin
#define MY_RS485_DE_PIN 2

// Set RS485 baud rate to use
#define MY_RS485_BAUD_RATE 9600

// Enable this if RS485 is connected to a hardware serial port
//#define MY_RS485_HWSERIAL Serial1

// Enable serial gateway
#define MY_GATEWAY_SERIAL
// Enable gateway ethernet module type
//#define MY_GATEWAY_W5100
#define MY_GATEWAY_ENC28J60

// Enable MY_IP_ADDRESS here if you want a static ip address (no DHCP)
#define MY_IP_ADDRESS 192,168,0,14

// If using static ip you can define Gateway and Subnet address as well
#define MY_IP_GATEWAY_ADDRESS 192,168,0,1
#define MY_IP_SUBNET_ADDRESS 255,255,255,0


// The port to keep open on node server mode / or port to contact in client mode
#define MY_PORT 5003

#define MY_MAC_ADDRESS 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x59


//#define MY_NODE_ID 01
//#include <Ethernet.h>
#include <SPI.h>
#include <UIPEthernet.h>
#include <MySensors.h>

void setup()
{
	// Setup locally attached sensors
}

void presentation()
{
  //sendSketchInfo("RS 485 Gateway", "1.0");
	// Present locally attached sensors here
}

void loop()
{
	// Send locally attached sensors data here
}

[TheoL]

I'm not sure, but I think it depends on whether or not the code is using large local variables. At some point it's no longer possible to claim a space on the heap, because the free heap space is to fragmented

I have one Arduino that has a sketch with the same warning, but it's been running for a long time. No problems so far. But I've declared most of the variables global.

This is AdaFruits article on the topic:
https://cdn-learn.adafruit.com/downloads/pdf/memories-of-an-arduino.pdf

[dzjr]

@theol

thank you for your response and the link to the interesting document!

The gateway has only run a few hours with 3 node's, so do not know if it goes well after days.

As far as I could see, I turned off all unnecessary lines in the sketch.
However, I notice the W5100 library is a lot less used, but I only have that for a UNO ....

[dzjr]

I have now been running the gateway for more than half a year, and unfortunately the gateway runs regularly (about once every 2 weeks), so I am going to replace the gateway for a W5100 ethernet adapter.
I used it in a second gateway, and this gateway is stable, I haven't had any crashes in about 4 months.