Help on Different sleep Modes in ESP8266

Other Hardware 3rd Party Boards
1

EDIT: Updating topic . Didn't find any Modes that allows wifi connection in sleep mode

Now i have a different problem i am trying to use deepsleep .For some reason when the device go to deepsleep and i press rst in order to wakeup the device dosent boot up .it only boot up when i press reset again . Need to press rst twice in order to get esp8266 normal working again . I checked the boot log and this was the output

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)


 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3424, room 16 
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8 
tail 0
chksum 0x2b
csum 0x2b
v00042800
~ld
rf cal sector: 1020
freq trace enable 0

on the first press on rst the boot get stuck in that msg

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

When i press again the rest comes and code works as normal should.

Source code:

#include <ESP8266WiFi.h>

const char* ssid = "SSID";
const char* password = "PASS";


void setup() {
  Serial.begin(115200);
  Serial.println();
  // uint32_t bootMode = ESP.getBootMode();

  // Serial.print("Boot mode: ");
  // Serial.println(bootMode);
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  Serial.println();
  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 20) {
    delay(500);
    Serial.print(".");
    attempts++;
  }

  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("Connected to Wi-Fi");
  } else {
    Serial.println("Failed to connect");
  }

  // Configure light sleep to wake up when the button is pressed
  Serial.println("Entering  sleep mode");
  ESP.deepSleep(0);  // `0` means stay in light sleep indefinitely
  delay(10);
}

void loop() {
  // Serial.println("Entered loop");
  // delay(1000);
}

Currently the device is powered using usb and i only connected a switch to rst .And the issue only persist when i use deepsleep .So i hope it has to do with that part .Any one has any idea how to fix this issue ..

2

It's a known problem called "zombie mode" with certain esp8266 boards. In some cases 10k pullup on gpio7 may resolve it.

1 Like
3

I have this in Nodemcu v2 in V3 i dont face this issue . I searched on web and i found some research based on this topic . They couldn't find an exact solution for this problem .Some suggest pullup resistor as you suggested. I'll provide the link of the thread i found may it help others.

The Zombie Mode

Thank you for the reply i was kind of stuck getting no clue what was the issue.

4

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