Questions tagged [sleep]

Sleep refers to a form of power management, where the processor can be instructed to enter various levels of "sleep". Use this tag for discussions about sleep mode.

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Knowing if ESP32 wakes up itself or manually

I have a project where I put an ESP32 to deep sleep for a certain amount of time, eg: 1h To be able to self-awaken a cable must be connected from GPIO 16 to the reset pin, so basically the ESP pulls ...
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1answer
26 views

Input Capture with Sleep Enabled on ATM32u4 board only works every second reading in SLEEP mode

In short: I have an Input Capture code and a Power-Saving code combined into one program. Both are adapted from Nick Gammon's examples that work fine independently. When I combined them into one ...
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27 views

Trigger ESP8266 reset pin on broken connection

I have an ESP8266 which I wish to place in deep sleep until a reed switch senses a door being opened. The ESP8266 is woken from deep sleep by briefly raising the RESET pin high. In my original design, ...
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46 views

Wake up from a pin, Sleep when work is done

I have a project which needs to sleep most of the time, and when a button gets pressed, it does its thing which is producing a fading sound wave (using interrupts) until it's time to sleep again. The ...
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39 views

power consumption higher after XKC-Y25-V detects water

I am using an Arduino Pro Mini and a non-contact liquid sensor (XKC-Y25-V). I have the positive of the liquid sensor connected to pin 5, its sensor to pin 3 and ground to ground. I turn on the ...
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1answer
60 views

WeMos D1 ESP-Wroom-02 Mother Board ESP8266 - where is reset pin for deep-sleep

This item was bought for battery use with deep sleep purposes. For doing so in ESP8266 reset pin must be connected to Gnd pin in order to wake up. This board lacks a reset on- board pin. Since spec ...
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1answer
44 views

How to prevent flickering relay upon waking from deep sleep using ESP01 board?

I have a cheap ESP01 relay module and am using it with ESPEasy. I soldered the GPIO pin 16 to RST to allow deep sleep and that all works great. However when the unit wakes up the relay flickers quite ...
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24 views

Triggering a Sleep Wake-up Event using analog output from a triple axis accelerometer?

I am working on a project that uses a Arduino MKR GSM 1400 and a ADXL335 Accelerometer . I am having trouble setting a interrupt wake up event on one of the GSM's interrupt-capable pin due to the ...
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1answer
75 views

ESP32 - DeepSleep loop or not?

I'm trying to create a battery & solarpowered ESP32 for future use with sensors. It connects to Wifi, MQTT, publishes some readings and status messages and go back to sleep. From time to time (can ...
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24 views

Arduino sleep mode problem while sending data with gsm module

i am trying to send gps data via sim800l gsm module. Working fine without the power down code but when i add the power down code it stops working (not sending the gps data. code execution stops in ...
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2answers
90 views

How to keep track of millis during sleep mode

In my application, I need to keep track of the time the application has been running as well as use sleep modes. However, when using the sleep modes, Timer0 is disabled, and therefore millis stop ...
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29 views

D1 Mini + TFT & I2C Connector Shield not going into deepSleep

I'm trying to write a sketch to use a Wemos D1 mini connected to several shields including a LOLIN TFT & I2C Connector Shield (v1.1.0). This powers a small ePaper display (LOLIN 2.13" diagonal ...
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1answer
57 views

Keep 5V on while sleep with LowPower library

Is it possible to keep the 5V on, while putting the Arduino (ATMEGA328P) in sleep more, using LowPower library? I'm trying to use this HAT: https://spellfoundry.com/product/sleepy-pi-2-usb-c/ to ...
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1answer
55 views

Mediatek GPS periodic mode

I'm trying to build a low power GPS datalogger and I am trying to get the Mediatek based GPS module (Quectel L80-R) to run in periodic mode. I've sent the PMTK225 code to the module with various ...
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2answers
267 views

Can't create a RTC_DATA_ATTR var inside a class

I'm trying to create a deepSleep class for my ESP32 project, but I get this error : section attribute not allowed for 'clock_beforeSleep' The only place it compiles, is outside the class. How should ...
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1answer
275 views

ESP32 - NTP inaccuracy after deep sleep

I'm trying to create a sensor sampling project using ESP32 ( battery, solar panel and temperature affects are not part of test right now to reduce external effects that may cause/ increase such ...
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74 views

Problem with counting inside INT0 ISR while in PowerDown

The issue that I have is in INT0 service in which it doesn't perform properly when MCU is set in PowerDown mode. I declared a global variable as "counter" and put it inside INT0 ISR but its value ...
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1answer
119 views

Attiny85 simple analog and digital output problem

I'm just lighting up an LED through a TIP31C, pin 0 goes through a 560kohm resistor to the tip's input pin pin 1 goes through a 750 ohm resistor to the tip's input pin ^i'm not sure this information ...
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1answer
142 views

ESP8266 Deep Sleep Wake Up

I am testing esp8266's deep sleep mode. And i have some questions about that. 1- I want to wakeup esp via timer. I did it. I implemented GPIO16-RST connection and this version done. 2- I want to ake ...
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1answer
110 views

ATMega32u4 SLEEP instruction

I was reading the ATMega34u2 datasheet and trying to figure out Sleep Mode. I know most people recommend using avr/sleep.h library. But I wanted to try out using the registers. I am fairly new to all ...
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99 views

Radio receiver: deep sleep when no byte arrives, and wake up when a byte arrives?

This code works to listen for bytes via radio (with a 433 Mhz receiver module) with the Manchester library and Manchester code, and do an action when certain bytes are received: #include "Manchester....
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279 views

Sparkfun ESP32 WROOM Thing Plus Deep Sleep & Interrupts codes “marriage” problem

Would like to ask for assistance. Tried several routes. My knowledge is lacking and unable to progress further. I think I am very close to the solution (maybe couple of lines of codes away), but the ...
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2answers
472 views

How to deep sleep ATtiny/ATmega (to run for years with batteries) but still detect a button press?

Question (TL;DR): what is the optimal method to deep sleep (to run an ATtiny45 or ATmega on batteries for 1+ year) but still be able to detect a button press? Is it possible to deep sleep until a ...
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4answers
147 views

wake from powerDown to check sensor then put back to sleep

I am using an Arduino Pro Mini with various sensors. I am powering it with 2 3.7v 3400mA batteries which I recharge with a solar panel. I take a reading from the batteries and if the reading is ...
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1answer
84 views

Solar powered ESP8266. WiFi module usage optimizations

Above all, I am quite new to the ESP8266 and micro controllers development as a whole. I am now working on a project which is quite simple for now. It basically looks like this: As you can see, I ...
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1answer
144 views

Deep Sleep Reset with Shock Sensor

I am trying to design a circuit that wakes my ESP8266 (Wemos D1 Mini) from deep sleep using a shock sensor. I can achieve this using the reset pin but I need it to ignore further requests to reset to ...
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1answer
156 views

How to wake up Arduino with an rtc?

I am doing a data logger with an Arduino Mega2560 and I want to use a code to make it sleep when no measure is needed and wake it up with an RTC when time comes. The reason I want this is because I ...
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1answer
96 views

Waking Arduino from sleep with an ultrasonic sensor

I have a parking guide using an ultrasonic sensor (HC-SR04), based on the instructions here. I'm trying to modify the code so that the Arduino goes to sleep after a certain period of inactivity (say, ...
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1answer
403 views

ESP8266 spend 10mA, even though It is in the deep sleep mode

I am using Nodemcu ESP8266. I want to know how much my ESP board consume the battery during sleep mode. as the Mannual said it spend about micro-ampere, but my multi meter said it spend 10 mili-ampere,...
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0answers
58 views

How to get interrupt while in sleep mode?

I am using Arduino-uno, attached ESP-01 module I want to give interrupt when I send some wifi-signal to arduino, which is in sleep mode. so I write this code: SoftwareSerial esp(2, 3); // RX, TX ...
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0answers
203 views

Millis() does not back to zero after woke up from deep sleep mode

I am going to make a project that needs four boards of Arduino which synchronization in time is needed. The project is about capturing the timestamp (in ms resolution) whenever something is crossing ...
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130 views

Waking up a NodeMCU when force load is applied to device

I am currently designing a device that will take measurements from a load cell that is in tension. I am using a v1.0 NodeMCU device that features an HX711 load cell amplifier and is running off of ...
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0answers
131 views

ESP8266 http.get() issue due to wifi authentication failure

Facing a weird issue while reading data from esp8266. I am trying to read dynamic data from a demo text file on test server on same network in deep sleep mode. Case1: Joining new network I am using ...
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132 views

Using Sleep with Interrupts

I have 2 doors closet, that I want to lit when door is open. I use 2 prox sensors to detect state, an Arduino Pro mini, and 2 led strips. I use same code and hardware ( minus not needed doubled ...
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1answer
101 views

Push and hold on/off switch for arduino

Many electronic devices turn on/off, or more correctly on/sleep, by pressing a button and holding it for two or three seconds. I would like to put this ability into a project using an Adafruit Feather ...
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0answers
813 views

How can I put this display SSD1306 to sleep?

I have built a kitchen timer and it is supposed to spend most of its life in sleep mode in order to save power. I am using the SSD1306Ascii library (SPI) by William Greiman. In this library I have ...
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1answer
384 views

How to use one button with interrupt to enable and disable sleep mode?

I have written a program for a kitchen timer. The timer uses just one single rotary encoder with a push button on its axis. It has modes for counting up and for counting down. After counting down it ...
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1answer
473 views

attiny85 reset itself instead of wakeup procedure

I have a digispark attiny85, and I am using SLEEP_MODE_PWR_DOWN to sleep, and wake-up with external interrupt on pin2. I am trying to count number of interrupts received with the code below. Problem ...
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1answer
502 views

How ro re-enable 32u4 USB controller after sleep mode?

I've run into quite the problem with my 32u4, I can't get it to reconnect to the computer upon wakeup from a sleep mode! So I have an Arduino Pro Micro featuring the 32u4, and I'm also designing a ...
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2answers
2k views

Custom sleep function for Nextion

I have a Nextion 7 inch enhance type display. I have enabled sleep using thsp = 120 and thup = 1 line of code. Now display become sleep mode after 2min, if there is no any touch event. But, this ...
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2answers
107 views

Store value in EEPROM to perform different actions on reset?

I want the same button to wake up (reset) and put it to sleep but this is hard if the button is tied directly to the rst pin. My thought was to read and store a value in EEPROM so tell the chip what ...
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1answer
3k views

ESP8266 deep sleep and MQTT

I am working on a project were I am putting my board into deep sleep mode, and it wakes up with an interrupt from a sensor. When it wakes from deep sleep I would like to send a message to my MQTT ...
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1answer
75 views

noisy output lines when waking up from a sleep

Using code similar to these examples from AVR https://www.microchip.com/webdoc/AVRLibcReferenceManual/group__avr__sleep.html my program causes my Adafruit Feather 32u4 to often sleep. When the ...
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1answer
897 views

Why does using ESP8266 in deep sleep mode still drain the battery quickly?

I've made a "weather station" using the ESP8622. To save battery I'm using sleep mode but still the battery is drained after a couple of days. According to this post it should last at least a year. I ...
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1answer
142 views

Low-Power library question

i'm study the Low-Power library to better undertand how it works. In this part of code i have some question. Sometime he uses commands like: power_timer1_disable(); power_timer0_disable(); but in ...
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2answers
3k views

Wake up ESP8266 from deepSleep with a button

I have a button with two isolated tracks. I want to be able to wake up esp from deepSleep with this button, and also detect that it was clicked. So i can't connect it to reset, because esp won't work ...
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1answer
88 views

Why can I wake Arduino only once with this code?

This is my enhanced code for a daylight alarm on Arduino UNO with an added MP3-Player. The device is supposed to sleep all the time except when I hit the play button (then it is supposed to play music)...
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1answer
519 views

MKR Fox 1200 doesn't wake up from sleep

I have a Sigfox Arduino meassuring some sensors, sending it to the cloud and then falling asleep. void setup() { Serial.begin(9600); while (!Serial) {}; if (!SigFox.begin()) { Serial.println(...
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1answer
229 views

Battery voltage monitor right after deep sleep

i have my esp32 module in deep sleep and i use it with a couple of buttons using a wake up that detect the button pressed now i'd like to have a battery level to send to a server right before going ...
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1answer
353 views

Hibernate Arduino for 12hrs with rtc1302 module

ok, Good morning, guys, with a data acquisition project, in this, I get data every 12 hours, even if it's only 12 hours, the arduino gets connected directly, and it's being powered by a 9v battery, ...