I have been trying to communicate by I2C while connected through Ethernet cable.
Stand alone, both communication works. Although, when I begin ETH, Wire stops working. ETH seems to work properly.
#include <ETH.h>
#include <Wire.h>
static bool eth_connected = false;
void WiFiEvent(WiFiEvent_t event)
{
switch (event) {
case SYSTEM_EVENT_ETH_START:
Serial.println("ETH Started");
//set eth hostname here
ETH.setHostname("esp32-ethernet");
break;
case SYSTEM_EVENT_ETH_CONNECTED:
Serial.println("ETH Connected");
break;
case SYSTEM_EVENT_ETH_GOT_IP:
Serial.print("ETH MAC: ");
Serial.print(ETH.macAddress());
Serial.print(", IPv4: ");
Serial.print(ETH.localIP());
if (ETH.fullDuplex()) {
Serial.print(", FULL_DUPLEX");
}
Serial.print(", ");
Serial.print(ETH.linkSpeed());
Serial.println("Mbps");
eth_connected = true;
break;
case SYSTEM_EVENT_ETH_DISCONNECTED:
Serial.println("ETH Disconnected");
eth_connected = false;
break;
case SYSTEM_EVENT_ETH_STOP:
Serial.println("ETH Stopped");
eth_connected = false;
break;
default:
break;
}
}
void testClient(const char * host, uint16_t port)
{
Serial.print("\nconnecting to ");
Serial.println(host);
WiFiClient client;
if (!client.connect(host, port)) {
Serial.println("connection failed");
return;
}
client.printf("GET / HTTP/1.1\r\nHost: %s\r\n\r\n", host);
while (client.connected() && !client.available());
while (client.available()) {
Serial.write(client.read());
}
Serial.println("closing connection\n");
client.stop();
}
void setup()
{
Serial.begin(115200);
WiFi.onEvent(WiFiEvent);
ETH.begin(1, 17, 23, 18, ETH_PHY_LAN8720, ETH_CLOCK_GPIO0_OUT);
Wire.begin(33, 32,100000);
}
void loop()
{
if (eth_connected) {
testClient("google.com", 80);
}
delay(5000);
Wire.beginTransmission(40);
Wire.write("test");
Wire.endTransmission();
}
Opening port
Port open
ets Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:956
load:0x40078000,len:0
load:0x40078000,len:13076
entry 0x40078a58
[D][WiFiGeneric.cpp:293] _eventCallback(): Event: 19 - ETH_START
ETH Started
[W][esp32-hal-i2c.c:1094] i2cCheckLineState(): invalid state sda=0, scl=0
[E][esp32-hal-i2c.c:1110] i2cCheckLineState(): Bus Invalid State, TwoWire() Can't init
[D][WiFiGeneric.cpp:293] _eventCallback(): Event: 21 - ETH_CONNECTED
ETH Connected
[D][WiFiGeneric.cpp:293] _eventCallback(): Event: 23 - ETH_GOT_IP
ETH MAC: 30:AE:A4:19:5E:47, IPv4: 10.1.1.147, FULL_DUPLEX, 100Mbps
connecting to google.com
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com/
Content-Type: text/html; charset=UTF-8
Date: Fri, 01 Jun 2018 18:43:30 GMT
Expires: Sun, 01 Jul 2018 18:43:30 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>
closing connection
connecting to google.com
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com/
Content-Type: text/html; charset=UTF-8
Date: Fri, 01 Jun 2018 18:43:35 GMT
Expires: Sun, 01 Jul 2018 18:43:35 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>
closing connection
Port closed
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