reboot loop if starting ethernet on ESP32-PICO-V3

[hgatesCPV]

Board

ESP32-PICO-KIT (modified), also on a custom board

Device Description

I have two ESP32-PICO-KIT boards. They originally both had D4 chips on them. On one of them I replaced the chip with a V3 chip.

Hardware Configuration

nothing, just USB cable

Version

latest development Release Candidate (RC-X)

IDE Name

PlatformIO

Operating System

Windows 10

Flash frequency

default

PSRAM enabled

no

Upload speed

115200

Description

I can load and run simple test code, like LED or I/O pin blink. But when I try to start ethernet, program hangs and resets. This is only with V3 chip. With D4 chip I don't have the issue. This has come about because I designed a custom board for V3 and ordered 2k pieces of the chip. So I would really like to get V3 working!

Sketch

#include <Arduino.h>
#include <SPI.h>
#include <Ethernet.h>       // Ethernet library v2 is required


// Enter a MAC address and IP address for your controller below.
byte mac[] = {
  0x98, 0x76, 0xB6, 0x11, 0x85, 0x82
};
IPAddress ip(10,0,6,75); // The IP address will be dependent on your local network:

void setup() {
  Serial.begin(115200);     // Open serial communications and wait for port to open
  Serial.println("in setup\r\n");
  Ethernet.init(33);        // SS pin
  Ethernet.begin(mac, ip);  // start the Ethernet connection
  delay(1000);              // give the Ethernet shield a second to initialize
}

void loop() {
  Serial.println(Ethernet.localIP());
  delay(1000); 
}

Debug Message

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, 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:0x3fff0030,len:184  
load:0x40078000,len:12624
load:0x40080400,len:2916 
entry 0x400805c4
in setup

ets Jul 29 2019 12:21:46

rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, 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:0x3fff0030,len:184
load:0x40078000,len:12624
load:0x40080400,len:2916
entry 0x400805c4
in setup

Other Steps to Reproduce

On same board type (ESP32-PICO-KIT) with original D4 chip I get this output:
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:184
load:0x40078000,len:12596
load:0x40080400,len:2916
entry 0x400805c4
in setup

0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0

here is my platformio.ini

[env:pico32]
platform = https://github.com/Jason2866/platform-espressif32.git
platform_packages =
platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git
framework = arduino
board = pico32
monitor_speed = 115200
build_flags = -DLOG_LEVEL=6

lib_deps =
arduino-libraries/Ethernet@^2.0.0

I found some other similar things from other people about rebooting loops on V3 and D4 chips. Some people had power supply issues - I've tried adding capacitors and running off a lab power supply. Other people had luck using different sets of libraries and packages - I've tried all those and no change. Tried lowering CPU clk to 40MHz - no change.

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[hgatesCPV]

Also tried basic code with Wifi instead of Ethernet, same thing. When I get to ETH.begin() in setup() board hangs and then reboots from rst:0x08, perpetually.

[lbernstone]

Why can you not use the esp32 ethernet library? This repo does not support the library you are including. https://github.com/espressif/arduino-esp32/tree/master/libraries/Ethernet/examples

[hgatesCPV]

I don’t think that library works for W5500 Ethernet chip, right?

My application uses W5500. I chose that because it seemed pretty common with lots of projects based on it. It works fine with ESP32 non-pico

[hgatesCPV]

But I also tried it (on the esp32-pico-kit board) with arduino built in library and Wi-Fi. Same result: seemed to work for D4 chip, reboot loop for V3 chip

[lbernstone]

When you say running off a lab supply, do you mean you are supplying 3v3 from the lab supply directly to a 3v3 bus, or running 5v to a LDO/regulator that then converts to 3v3? If you have these reboots with wifi as well, then the Ethernet part can be ignored for now until you get Wifi working.

[hgatesCPV]

3.3v from lab supply for custom board. For esp32-pico-kit board power is coming from usb and through the ldo on that board.

[lbernstone]

Do you have a way to bypass the ldo and deliver 3v3 directly from the lab supply to the esp32 Vcc to test? These sorts of issues typically come from an inadequate current.

[hgatesCPV]

Sure I can do that. That is how I already have the custom board set up (though also tried it with switching regulator 24->3.3). On Monday I will try 3.3 direct to esp32-pico-kit board.

[hgatesCPV]

Attaching 3.3V from lab supply to pins on board does not change anything. Reboot loop for V3, not for D4.

To summarize where I am at now:

• Using two ESP32-PICO-KIT boards from Espressif, nothing else connected to board except USB cable
• one with the D4 chip it came with, one with a V3 chip I swapped in
• D4 chip seems to work normally, as far as I have tested it
• V3 chip can load and execute code, use serial terminal, and do simple things like toggle a pin. But when enabling wifi the chip hangs and reboots from watchdog.

I have tried direct 3.3V power supply, various other libraries and repositories, lower chip clock speed. So far nothing has an impact.

Here are the two boards I am using

Here is the basic sketch I am trying to use

#include <Arduino.h>
/*
    This sketch shows the Ethernet event usage
*/
#include <ETH.h>

static bool eth_connected = false;

void WiFiEvent(WiFiEvent_t event)
{
  switch (event) {
    case ARDUINO_EVENT_ETH_START:
      Serial.println("ETH Started");
      //set eth hostname here
      ETH.setHostname("esp32-ethernet");
      break;
    case ARDUINO_EVENT_ETH_CONNECTED:
      Serial.println("ETH Connected");
      break;
    case ARDUINO_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 ARDUINO_EVENT_ETH_DISCONNECTED:
      Serial.println("ETH Disconnected");
      eth_connected = false;
      break;
    case ARDUINO_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);
  Serial.println("in setup\r\n");
  WiFi.onEvent(WiFiEvent);
  ETH.begin();
}


void loop()
{
  if (eth_connected) {
    testClient("google.com", 80);
  }
  Serial.println(ETH.localIP());
  Serial.println("tick\r\n");
  delay(10000);
}

platformio.ini

[env:pico32]
;platform = espressif32
platform = https://github.com/Jason2866/platform-espressif32.git
platform_packages =
    platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git
board = pico32
framework = arduino
monitor_speed = 115200
build_flags = -DLOG_LEVEL=6
board_build.f_cpu = 40000000L

output from D4 chip:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13000
load:0x40080400,len:3036 
entry 0x400805e4
in setup

E (1058) esp.emac: emac_esp32_init(349): reset timeout
E (1060) esp_eth: esp_eth_driver_install(214): init mac failed 
[  1067][E][ETH.cpp:323] begin(): esp_eth_driver_install failed
0.0.0.0
tick

0.0.0.0
tick   

0.0.0.0
tick

output from V3 chip

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13000
load:0x40080400,len:3036 
entry 0x400805e4
in setup

ets Jul 29 2019 12:21:46

rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13000
load:0x40080400,len:3036
entry 0x400805e4
in setup

ets Jul 29 2019 12:21:46

rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 271414342, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:13000
load:0x40080400,len:3036
entry 0x400805e4
in setup

ets Jul 29 2019 12:21:46

[hgatesCPV]

I am starting to feel like maybe the issues have to do with conflict between the SPI pins and the in package flash on the PICO chips.

How can I tell which pins the Ethernet library will use for SPI? How can I change them. I've done some looking around in the code but it is not clear to me.