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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Sleep and Wake Arduino Nano 33 BLE
I'm trying to figure out how to wake up and put to sleep the Arduino Nano 33 BLE. I have seen a few post about it but absolutely nothing I can understand or implement. I'm attaching a subset of the ...
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Why are times different on different Arduino Pro Minis? [closed]
I am working on a project using a 5v Arduino Pro Mini. To save power I have it power down and wake up every about 15 minutes to check on the battery strength and then power down again. This cycle runs ...
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Combining esp_wakeup_timer with external interrupt ext0
I'm working with ESP32-Dev-Kit1 and MMA8452Q accelerometer. I want the ESP to read the accelerometer for 10s, then go to sleep for 10s. If within the sleep period, the accelerometer magnitude reading ...
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LED button alarm with DS3231 RTC problems
I am a PHP web programmer, but I am a beginner studying Arduino. I would like to inquire about a problem with the following function that I am creating while looking for various references. (This ...
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I want the Arduino to be in sleep mode by default and have a button wake it up
I saw a library called LowPower_LowPowerLab that can set the Arduino in sleep mode. In their example they put the Arduino to sleep using an external button, is there anyway to invert this behavior? I ...
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Wake esp8266 from deep sleep with PIR but disable while running code
I am using an ESP8266 to control a ring of neopixels. I want to use a PIR to trigger a brief light show. I'm using batteries and need them to last as long as possible.
I have it working by checking ...
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ATtiny85 with sleep and serial
I want to communicate over serial to another device (dfplayer) and also set the microcontroller into sleep mode.
The ATtiny85 does not have a hardware serial pin so I need to use a virtual serial (...
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Wemos D1 Mini deep sleep
I am building a very simple battery powered touch button using a Wemos D1 Mini (it is basically an ESP8266) and a capacitive touch sensor (something like this: https://www.az-delivery.de/en/products/...
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ESP8266-01S only coming back from DeepSleep every 2nd time
I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep.
My ...
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Arduino Nano 33 BLE power consumption optimization
I am working on building a sensor using Arduino Nano 33 BLE that will measure temperature using two thermistors and angle changes. The measured values will be transmitted over Bluetooth to a ...
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Wake-UP the ATtiniy44 from sleep_mode_pwr_down with a PushButton
I'm curently playing with sleep modes. When I push the button, melody starts, push again go to deep down sleep and save 3v battery, push again wake up and melody starts again. But seems like it doesn'...
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integer overflow in expression of type 'int' results
i need to wake up my ESP every 60 min to read some data and post it to server, all process working fine when i use numbers of minute below 60 (converted in microsecond x 1000000) but when i use 60 min ...
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Arudino receiving interrupt command BEFORE entering sleep mode causing it not to receive any interrupt commands in order to wake up
I've written code for an Arduino Nano that when a button is pressed, it sends an IR command. It is set so that if no button press has been received for a period of 10 seconds, it will enter sleep mode ...
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Is it possible to know how long an ESP8266 was in deep sleep?
I'm working on a low power device that implements an ESP8266 MCU and uses it's deep sleep feature. The firmware uses the Arduino C++ library.
Part of the functionality requires knowing the time. To do ...
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ESP32 can not deep sleep longer than 35 minutes
I'm trying to get my Lilygo T5 4.7" epaper to deep sleep for 12 hours.
But I only seem to be able to get about half an hour (2100s) of deepsleep on it.
If I set the timer for longer, it just ...
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