Add example to the repo

[Pimmetje]

It would be nice to add the example given here https://github.com/d-a-v/W5500lwIP/issues/3#issuecomment-431273815 as a example to the repository.

It could save some people some searching for the correct pin connection.

Thanks for making this. Ill test it later today.

[d-a-v]

Thanks for your interest. Current master will not work, use commit 81fd79b10955a436d111b984078a97d64801eb8f instead. Explanations:

This driver is about to be integrated in the esp8266 arduino core. esp8266/arduino core-2.5.1 is about to be released and right after that, per https://github.com/d-a-v/W5500lwIP/commit/b468cc893e655752cb5876dabb310950fb11751c and this awaiting PR https://github.com/esp8266/Arduino/pull/6039 which will hopefully be integrated, utilization of this driver will be much simpler and will fix use-cases like the one exposed by @borisneubert in https://github.com/d-a-v/W5500lwIP/issues/3#issuecomment-435566310

I am also currently working on a driver compatible with W5100 (#4)

// D0 CS SDCARD
// D8 CS ethernet
// D3 MOS
// D2 INPUT WATER
// D4 1-WIRE temp

#include <ESP8266WiFi.h>

#include <w5500-lwIP.h>

Wiznet5500lwIP eth(D0);

void setup ()
{
  // setup code
  // ...

  eth.setDefault(); // use ethernet for default route
  eth.begin(); // default mtu & mac address
}

void loop ()
{
  // do whatever needed, including
  while (true)
  {
    // do stuff
    yield();
  }
}

[Pimmetje]

Thanks for the fast response

I tried several versions of ESP the error i get is the same. It seems to me a issue with a include or something.

C:\Users\Pim\Documents\Arduino\libraries\W5500lwIP\w5500-lwIP.cpp: In member function 'boolean Wiznet5500lwIP::begin(const uint8_t*, uint16_t)':

C:\Users\Pim\Documents\Arduino\libraries\W5500lwIP\w5500-lwIP.cpp:52:86: error: 'schedule_function_us' was not declared in this scope

     else if (!schedule_function_us([&]() { this->handlePackets(); return true; }, 100))

                                                                                      ^

In file included from C:\Users\Pim\Documents\Arduino\libraries\W5500lwIP\w5500-lwIP.cpp:12:0:

C:\Users\Pim\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\cores\esp8266/FunctionalInterrupt.h: At global scope:

C:\Users\Pim\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\cores\esp8266/FunctionalInterrupt.h:32:28: warning: 'scheduledInterrupts' defined but not used [-Wunused-variable]

 static ScheduledFunctions* scheduledInterrupts;

[d-a-v]

I tried several versions of ESP the error i get is the same.

As I told,

Current master will not work, use commit 81fd79b instead.

Or, try with the PR https://github.com/esp8266/Arduino/pull/6039

(Well it maybe is not nice of me to to push beta code on master)

[borisneubert]

Thank you d-a-v, still watching. Will try soon.

[d-a-v]

Current state of this driver will now work with latest git version esp8266 arduino core. (I sufferred to get this PR in)

[borisneubert]

Tried this example:

#include <Arduino.h>
#include "ESP8266WiFi.h"
#include <W5500lwIP.h>

// Arduino Pin 4 = Wemos Pin D2
#define CSPIN 4

Wiznet5500lwIP ether;

byte mac[] = {0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02};

void setup() {

  Serial.begin(115200);
  Serial.println("");
  Serial.println("start");

  ether.setDefault();
  //int present = ether.begin(mac);
  int present = ether.begin();
  Serial.println("present= " + String(present, HEX));

  while (!ether.connected()) {
    Serial.print(".");
    delay(1000);
  }
}

void loop() {  }

with latest Arduino core.

Still get this error:

In file included from .pio/libdeps/d1_mini/W5500lwIP/src/W5500lwIP.h:5:0,
                 from src/main.cpp:3:
.pio/libdeps/d1_mini/W5500lwIP/src/utility/lwIPeth.h: In instantiation of 'boolean LwipEthernet<RawEthernet>::begin(const uint8_t*, uint16_t) [with RawEthernet = Wiznet5500; boolean = bool; uint8_t = unsigned char; uint16_t = short unsigned int]':
src/main.cpp:20:29:   required from here
.pio/libdeps/d1_mini/W5500lwIP/src/utility/lwIPeth.h:127:86: error: 'schedule_function_us' was not declared in this scope
     else if (!schedule_function_us([&]() { this->handlePackets(); return true; }, 100))
                                                                                      ^

[d-a-v]

Sorry you need to use git version. The api for Ethernet is still not stable and under heavy discussion. It should work anyway and I'll update when needed until I can integrate everything into the arduino core.

[borisneubert]

Thank you for your quick reply!

I actually use the version of W5500lwIP from this git repository.

We just wait until things have stabilized and continue to watch this repo.

[emelianov]

For some reason at least with latest Arduino core (commit 9f03bbb8c38adf2f6dc9fb95e304b51f20a72f92 from Jun 14 14:58:29 2019) handlePackets() never called with delay() or yield() in setup section. Have to add run_scheduled_functions() as workaround.

#include <SPI.h>
#include <ESP8266WiFi.h>

#include <W5500lwIP.h>
#include <Schedule.h>

Wiznet5500lwIP eth(SPI, D4);
byte mac[] = {0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02};

void setup ()
{
  Serial.begin(115200);
  WiFi.mode(WIFI_OFF);
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE0);
  SPI.setFrequency(40000000); // Works up to 80M

  eth.setDefault(); // use ethernet for default route
  int present = eth.begin(mac);
  Serial.println("present= " + String(present, HEX));

  while (!eth.connected()) {
    Serial.print(".");
    delay(1000);
    run_scheduled_functions();
  }
  Serial.println(eth.localIP());
}

void loop ()
{
    yield();
}

[d-a-v]

@borisneubert I have so far been using one of the examples you pointed me to to test this driver. (with mqtt)

#include <Arduino.h>

//....................................................
// WiFi
#include "ESP8266WiFi.h"
const char *ssid = STASSID;
const char *password = STAPSK;

//....................................................
#define CSPIN 16 // GPIO16

//#include <W5500lwIP.h>
//Wiznet5500lwIP eth(SPI, CSPIN);

#include <W5100lwIP.h>
Wiznet5100lwIP eth(SPI, CSPIN);

int present = 0;

#include <osapi.h>
LOCAL os_timer_t eth_timer;
int led = 0;

//....................................................
// asynchronous web server
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
AsyncWebServer server(80);

//....................................................
// ntp client
#include <NTPClient.h>
#include <WiFiUdp.h>

#define NTPSERVER "91.202.42.83"
//#define NTPSERVER "0.ubuntu.pool.ntp.org"
//#define NTPSERVER "192.53.103.108"
WiFiUDP ntpUDP;
NTPClient ntpClient(ntpUDP, NTPSERVER, 3600, 20000);
unsigned long long t = 0, t0 = 0;

//....................................................
// mqtt client
#include <PubSubClient.h>
WiFiClient espClient;
PubSubClient client(espClient);
const char* mqtt_server = "10.0.1.254";
long lastMsg = 0;
char msg[50];
int value = 0;
String mqttMsg;

// mqtt callback
void callback(char* topic, byte* payload, unsigned int length) {
  Serial.println("MQTT incomming subcribe: ");
  mqttMsg = topic;
  mqttMsg += " - ";
  for (int i = 0; i < length; i++) {
    mqttMsg += (char)payload[i];
  }
  Serial.println(mqttMsg);
}
// mqtt reconnect
void reconnect() {
  Serial.print("Attempting MQTT connection...");
  String clientId = "ESP8266Client-";
  if (client.connect(clientId.c_str())) {
    Serial.println("connected");
    client.publish("outTopic/start", "Hello from W5500!");
    client.subscribe("inTopic/#");
  } else {
    Serial.print("failed, rc=");
    Serial.print(client.state());
    Serial.println(" try again in 5 seconds");
  }
  /*
    -4 : MQTT_CONNECTION_TIMEOUT - the server didn't respond within the keepalive time
    -3 : MQTT_CONNECTION_LOST - the network connection was broken
    -2 : MQTT_CONNECT_FAILED - the network connection failed
    -1 : MQTT_DISCONNECTED - the client is disconnected cleanly
    0 : MQTT_CONNECTED - the client is connected
    1 : MQTT_CONNECT_BAD_PROTOCOL - the server doesn't support the requested version of MQTT
    2 : MQTT_CONNECT_BAD_CLIENT_ID - the server rejected the client identifier
    3 : MQTT_CONNECT_UNAVAILABLE - the server was unable to accept the connection
    4 : MQTT_CONNECT_BAD_CREDENTIALS - the username/password were rejected
    5 : MQTT_CONNECT_UNAUTHORIZED - the client was not authorized to connect
  */
}

//....................................................
void ICACHE_RAM_ATTR eth_loop(void) {
  digitalWrite(LED_BUILTIN, led);
  led = 1 - led;
  //if(present) eth.loop();
}

bool schedule_function_us(const std::function<bool(void)>& fn, uint32_t repeat_ms = 0);

//####################################################
// setup
//####################################################
void setup() {

  // starting example
  Serial.begin(115200);
  Serial.println("");
  delay(1000);
  Serial.println("starting example...");

  // starting wifi
  Serial.println("starting wifi...");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  int i = 0;
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    i++;
    if (i > 20) break;
  }
  Serial.println("");
  if (i > 20) {
    Serial.println("wifi connection failed");
  } else {
    Serial.print("wifi ip address: ");
    Serial.println(WiFi.localIP());
    Serial.print("wifi hostname: ");
    Serial.println(WiFi.hostname());
  }

  // starting ethernet
  // enable Ethernet here-------------------
  pinMode(LED_BUILTIN, OUTPUT);

  //Serial.println("starting ethernet...");
  //os_timer_disarm(&eth_timer);
  //os_timer_setfn(&eth_timer, (os_timer_func_t *)eth_loop, NULL);
  //os_timer_arm(&eth_timer, 1, 1);

  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV4); // 4 MHz?
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE0);

  eth.setDefault(); // use ethernet for default route
  present = eth.begin();
  if (!present) {
    Serial.println("no ethernet hardware present");
    //return;
  } else {
    Serial.print("connecting ethernet");
    while (!eth.connected()) {
      Serial.print(".");
      delay(1000);
    }
    Serial.println();
    Serial.print("ethernet ip address: ");
    Serial.println(eth.localIP());
  }

  // starting web server
  server.on("/", HTTP_GET, [](AsyncWebServerRequest * request) {
    String htmlStr = "";
    htmlStr += "<HTML>";
    htmlStr += "<HEAD>";
    htmlStr += "<meta http-equiv=\"refresh\" content=\"1\">";
    htmlStr += "<TITLE />WiFi/ETH</title>";
    htmlStr += "</head>";
    htmlStr += "<BODY>";
    htmlStr += "WiFi/ETH";
    htmlStr += "<br />";
    htmlStr += "WiFi IP: ";
    htmlStr += WiFi.localIP().toString();
    htmlStr += "<br />";
    htmlStr += "ETH IP: ";
    htmlStr += eth.localIP().toString();
    htmlStr += "<br />";
    htmlStr += "Time: ";
    htmlStr += ntpClient.getFormattedTime();
    htmlStr += "<br />";
    htmlStr += "MQTT: ";
    htmlStr += mqttMsg;
    htmlStr += "<br />";
    htmlStr += "</BODY>";
    htmlStr += "</HTML>";
    request->send(200, "text/html", htmlStr);
  });
  server.begin();

  // starting ntp client
  Serial.println("starting ntp client...");
  ntpClient.begin();

  // starting mqtt client
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  client.subscribe("inTopic");

  // ready
  Serial.println("setup complete");
}

//####################################################
// loop
//####################################################
void loop() {
  while (true)
  {
    client.loop();
    ntpClient.update();

    t = ntpClient.getEpochTime();
    if (t != t0) {
      if (!client.connected()) reconnect();

      Serial.println(ntpClient.getFormattedTime());
      Serial.print("wifi ip address: ");
      Serial.println(WiFi.localIP());
      Serial.print("ethernet ip address: ");
      Serial.println(eth.localIP());

      client.publish("outTopic", ntpClient.getFormattedTime().c_str());
      t0 = t;

      uint32_t mfree;
      uint16_t mmax;
      uint8_t frag;
      ESP.getHeapStats(&mfree, &mmax, &frag);
      Serial.printf("%d %d %d\n", mfree, mmax, frag);

    }
    yield();
  }
}

[Pfannex]

Moin d-a-v,

I tried to run your latest example. I use your latest W5500lwIP commit an the actual stable Arduino core version 2.52.

Compiling the demo sketch results the following errors:

In file included from \Arduino\libraries\W5500lwIP/W5100lwIP.h:5:0, from W5500_dav_NEW.ino:15: Documents\Arduino\libraries\W5500lwIP/utility/lwIPeth.h: In instantiation of 'boolean LwipEthernet::begin(const uint8_t*, uint16_t) [with RawEthernet = Wiznet5100; boolean = bool; uint8_t = unsigned char; uint16_t = short unsigned int]':

W5500_dav_NEW.ino:146:23: required from here

Arduino\libraries\W5500lwIP/utility/lwIPeth.h:133:96: error: 'schedule_recurrent_function_us' was not declared in this scope

else if (!schedule_recurrent_function_us([&]() { this->handlePackets(); return true; }, 100))

Witch core-version do you use?

[d-a-v]

Latest git is required !

[mynameisbill2]

Moin d-a-v,

I tried to run your latest example. I use your latest W5500lwIP commit an the actual stable Arduino core version 2.52.

Compiling the demo sketch results the following errors:

In file included from \Arduino\libraries\W5500lwIP/W5100lwIP.h:5:0, from W5500_dav_NEW.ino:15: Documents\Arduino\libraries\W5500lwIP/utility/lwIPeth.h: In instantiation of 'boolean LwipEthernet::begin(const uint8_t*, uint16_t) [with RawEthernet = Wiznet5100; boolean = bool; uint8_t = unsigned char; uint16_t = short unsigned int]': W5500_dav_NEW.ino:146:23: required from here Arduino\libraries\W5500lwIP/utility/lwIPeth.h:133:96: error: 'schedule_recurrent_function_us' was not declared in this scope else if (!schedule_recurrent_function_us(& { this->handlePackets(); return true; }, 100))

Witch core-version do you use?

Hi Pfannex, Have you resolved this problem? I met the same problem.

[d-a-v]

core 2.5.2 will not work. Git version of the core is necessary. Alternatively, you can use snapshots of the core (https://d-a-v.github.com)

[d-a-v]

Ethernet PR on arduino core launched: https://github.com/esp8266/Arduino/pull/6680 Merge won't happen before next core release. But I can keep alternative installable snapshots like in the post above which would include the ethernet PR.

[Pfannex]

Moin David,

with latest core commit dd73a18 WiFi and also ETH seems to run perfect including:

• async Web Server
• NTP-Client
• MQTT-Client

The Webserver is supported on WiFi-IP and also on ETH-IP. Both runs continuously!

In the next step we will test the lwIP function in our OmniESP-framework...

good job!

latest test sketch

#include <Arduino.h>

//....................................................
// WiFi
#include "ESP8266WiFi.h"
const char *ssid = "xxxxx";
const char *password = "xxxxx";

//....................................................
#define CSPIN 4 // GPIO4

#include <W5500lwIP.h>
Wiznet5500lwIP eth(SPI, CSPIN);

//#include <W5100lwIP.h>
//Wiznet5100lwIP eth(SPI, CSPIN);

int present = 0;

#include <osapi.h>
LOCAL os_timer_t eth_timer;
int led = 0;

//....................................................
// asynchronous web server
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
AsyncWebServer server(80);

//....................................................
// ntp client
#include <NTPClient.h>
#include <WiFiUdp.h>

#define NTPSERVER "91.202.42.83"
//#define NTPSERVER "0.ubuntu.pool.ntp.org"
//#define NTPSERVER "192.53.103.108"
WiFiUDP ntpUDP;
NTPClient ntpClient(ntpUDP, NTPSERVER, 3600, 20000);
unsigned long long t = 0, t0 = 0;

//....................................................
// mqtt client
#include <PubSubClient.h>
WiFiClient espClient;
PubSubClient client(espClient);
const char* mqtt_server = "192.168.1.10";
long lastMsg = 0;
char msg[50];
int value = 0;
String mqttMsg;

// mqtt callback
void callback(char* topic, byte* payload, unsigned int length) {
  Serial.println("MQTT incomming subcribe: ");
  mqttMsg = topic;
  mqttMsg += " - ";
  for (int i = 0; i < length; i++) {
    mqttMsg += (char)payload[i];
  }
  Serial.println(mqttMsg);
}
// mqtt reconnect
void reconnect() {
  Serial.print("Attempting MQTT connection...");
  String clientId = "ESP8266Client-";
  if (client.connect(clientId.c_str())) {
    Serial.println("connected");
    client.publish("outTopic/start", "Hello from W5500!");
    client.subscribe("inTopic/#");
  } else {
    Serial.print("failed, rc=");
    Serial.print(client.state());
    Serial.println(" try again in 5 seconds");
  }
  /*
    -4 : MQTT_CONNECTION_TIMEOUT - the server didn't respond within the keepalive time
    -3 : MQTT_CONNECTION_LOST - the network connection was broken
    -2 : MQTT_CONNECT_FAILED - the network connection failed
    -1 : MQTT_DISCONNECTED - the client is disconnected cleanly
    0 : MQTT_CONNECTED - the client is connected
    1 : MQTT_CONNECT_BAD_PROTOCOL - the server doesn't support the requested version of MQTT
    2 : MQTT_CONNECT_BAD_CLIENT_ID - the server rejected the client identifier
    3 : MQTT_CONNECT_UNAVAILABLE - the server was unable to accept the connection
    4 : MQTT_CONNECT_BAD_CREDENTIALS - the username/password were rejected
    5 : MQTT_CONNECT_UNAUTHORIZED - the client was not authorized to connect
  */
}

//....................................................
void ICACHE_RAM_ATTR eth_loop(void) {
  digitalWrite(LED_BUILTIN, led);
  led = 1 - led;
  //if(present) eth.loop();
}

bool schedule_function_us(const std::function<bool(void)>& fn, uint32_t repeat_ms = 0);

//####################################################
// setup
//####################################################
void setup() {

  // starting example
  Serial.begin(115200);
  Serial.println("");
  delay(1000);
  Serial.println("starting example...");

  // starting wifi

  Serial.println("starting wifi...");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  int i = 0;
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    i++;
    if (i > 20) break;
  }
  Serial.println("");
  if (i > 20) {
    Serial.println("wifi connection failed");
  } else {
    Serial.print("wifi ip address: ");
    Serial.println(WiFi.localIP());
    Serial.print("wifi hostname: ");
    Serial.println(WiFi.hostname());
  }

  // starting ethernet
  // enable Ethernet here-------------------
  pinMode(LED_BUILTIN, OUTPUT);

  Serial.println("starting ethernet...");
  //os_timer_disarm(&eth_timer);
  //os_timer_setfn(&eth_timer, (os_timer_func_t *)eth_loop, NULL);
  //os_timer_arm(&eth_timer, 1, 1);

  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV4); // 4 MHz?
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE0);

  eth.setDefault(); // use ethernet for default route
  present = eth.begin();
  if (!present) {
    Serial.println("no ethernet hardware present");
    //return;
  } else {
    Serial.print("connecting ethernet");
    while (!eth.connected()) {
      Serial.print(".");
      delay(1000);
    }
    Serial.println();
    Serial.print("ethernet ip address: ");
    Serial.println(eth.localIP());
  }

  // starting web server
  server.on("/", HTTP_GET, [](AsyncWebServerRequest * request) {
    String htmlStr = "";
    htmlStr += "<HTML>";
    htmlStr += "<HEAD>";
    htmlStr += "<meta http-equiv=\"refresh\" content=\"1\">";
    htmlStr += "<TITLE />WiFi/ETH</title>";
    htmlStr += "</head>";
    htmlStr += "<BODY>";
    htmlStr += "WiFi/ETH";
    htmlStr += "<br />";
    htmlStr += "WiFi IP: ";
    htmlStr += WiFi.localIP().toString();
    htmlStr += "<br />";
    htmlStr += "ETH IP: ";
    htmlStr += eth.localIP().toString();
    htmlStr += "<br />";
    htmlStr += "Time: ";
    htmlStr += ntpClient.getFormattedTime();
    htmlStr += "<br />";
    htmlStr += "MQTT: ";
    htmlStr += mqttMsg;
    htmlStr += "<br />";
    htmlStr += "</BODY>";
    htmlStr += "</HTML>";
    request->send(200, "text/html", htmlStr);
  });
  server.begin();

  // starting ntp client
  Serial.println("starting ntp client...");
  ntpClient.begin();

  // starting mqtt client
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  client.subscribe("inTopic");

  // ready
  Serial.println("setup complete");
}

//####################################################
// loop
//####################################################
void loop() {
  while (true)
  {
    client.loop();
    ntpClient.update();

    t = ntpClient.getEpochTime();
    if (t != t0) {
      if (!client.connected()) reconnect();

      Serial.println(ntpClient.getFormattedTime());
      Serial.print("wifi ip address: ");
      Serial.println(WiFi.localIP());
      Serial.print("ethernet ip address: ");
      Serial.println(eth.localIP());
      //Serial.println(eth.begin());

      client.publish("outTopic", ntpClient.getFormattedTime().c_str());
      t0 = t;

      uint32_t mfree;
      uint16_t mmax;
      uint8_t frag;
      ESP.getHeapStats(&mfree, &mmax, &frag);
      Serial.printf("%d %d %d\n", mfree, mmax, frag);

    }
    yield();
  }
}

[d-a-v]

Thanks for testing, for the report !

[Pfannex]

Hi David,

right now we implement your lwIP into our framework. It works pretty!

Every time the state of the ETH-connection changes we also want to change the default route.

Therefor you implemented:

template <class RawEthernet>
void LwipEthernet<RawEthernet>::setDefault ()
{
    Serial.println("set ETH to default, revise if not connected!");
    _default = true;
    if (connected())
        netif_set_default(&_netif);
}

#endif // _LWIPETH_H

How to make it switchable?

like

void LwipEthernet<RawEthernet>::setDefault (boolean state)
{
    _default = state;
     netif_set_default(&_netif);
}

or like

void LwipEthernet<RawEthernet>::setDefault ()
{
    if (connected()){
      _default = true;
    }else{
      _default = false;
    }
     netif_set_default(&_netif);
}

[d-a-v]

I think it would work: (why)

void LwipEthernet<RawEthernet>::setDefault (boolean enable)
{
     netif_set_default(enable? &_netif: nullptr);
}