![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/05\/esp8266-deep-sleep-micropython.jpg?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nIf you have an ESP32, we recommend reading our MicroPython ESP32 Deep Sleep and Wake Up Sources Guide<\/a>.<\/p>\n\n\n\n To follow this tutorial you need MicroPython firmware flashed in your ESP8266. You also need an IDE to write and upload the code to your board. We suggest using Thonny IDE or uPyCraft IDE:<\/p>\n\n\n\n When the ESP8266 is in deep sleep mode, everything is off except the Real Time Clock (RTC), which is how the ESP8266 keeps track of time.<\/p>\n\n\n\n In deep sleep mode, the ESP8266 chip consumes approximately However, you should keep in mind that in an assembled ESP8266 board, it consumes a lot more current.<\/p>\n\n\n\n We were able to build a weather station data logger with the ESP8266 using MicroPython that only consumes 7uA when it is in deep sleep mode: Low Power Weather Station Datalogger using ESP8266 and BME280 with MicroPython<\/a><\/p>\n\n\n\n There are slightly different ways to wake up the ESP8266 with a timer after deep sleep. One of the easiest ways is using the following function in your code.<\/p>\n\n\n\n We recommend copying the previous function to the beginning of your script, and then call the deep_sleep()<\/span> function to put the ESP8266 in deep sleep mode.<\/p>\n\n\n\n This deep_sleep()<\/span> function creates a timer that wakes up the ESP8266 after a predetermined number of seconds. To use this function later in your code, you just need to pass as an argument the sleep time in milliseconds.<\/p>\n\n\n\n In the following code, the ESP8266 is in deep sleep mode for 10 seconds. When it wakes up, it blinks an LED, and goes back to sleep again. This process is repeated over and over again.<\/p>\n\n\n View raw code<\/a><\/p>\n\n\n\n First, import the necessary libraries:<\/p>\n\n\n\n Create a Pin<\/span> object that refers to GPIO 2<\/span> called led<\/span>. For our board, it refers to the on-board LED.<\/p>\n\n\n\n After that, add the deep_sleep()<\/span> function to your code:<\/p>\n\n\n\n The following lines blink the LED.<\/p>\n\n\n\n Before going to sleep, we add a delay of 5 seconds and print a message to indicate it is going to sleep.<\/p>\n\n\n\n It\u2019s important to add that delay of 5 seconds before going to sleep when we are developing the script. When you want to upload a new code to your board, it needs to be awaken. So, if you don\u2019t have the delay, it will be difficult to catch it awake to upload code later on. After having the final code, you can remove that delay.<\/p>\n\n\n\n Finally, put the ESP8266 in deep sleep for 10 seconds (10 000 milliseconds) by calling the deep_sleep()<\/span> function and passing as argument the number of milliseconds.<\/p>\n\n\n\n After 10 seconds, the ESP8266 wakes up and runs the code from the start, similarly of when you press the RESET button.<\/p>\n\n\n\n Copy the code provided to the main.py<\/em> file and upload it to your ESP8266. <\/p>\n\n\n\n If you don\u2019t know how to upload the script follow this tutorial if you\u2019re using Thonny IDE<\/a>, or this one if you’re using uPyCraft IDE<\/a>. <\/p>\n\n\n\n After uploading the code, you need to connect GPIO16<\/span> (D0) to the RST pin so that the ESP8266 can wake itself up.<\/p>\n\n\n\n Important: <\/strong> if you don’t connect GPIO16 to the RST pin, the ESP8266 will not wake up.<\/p>\n\n\n\n After uploading the code and connecting GPIO 16<\/span> (D0) to the RST pin, the ESP8266 should blink the on-board LED and print a message in the shell.<\/p>\n\n\n\n Then, it goes to sleep for 10 seconds, wakes up and runs the code again. This proccess is repeated over and over again.<\/p>\n\n\n\n If you want to make a similar setup with an ESP-01 board, you need to solder a wire as shown in the following figure. That tiny pin in the chip is GPIO16 and it needs to be connected to the RST pin. <\/p>\n\n\n\n However, the pins are so tiny that it is really hard to solder a wire like that to the GPIO 16 without damaging the chip.<\/p>\n\n\n\n Learn more about the ESP8266 GPIOs: ESP8266 Pinout Reference: Which GPIO pins should you use?<\/a><\/p>\n\n\n\n The ESP8266 doens’t support external wake up like the ESP32 does. But, there is something we can do about that.<\/p>\n\n\n\n If we put the ESP8266 in deep sleep for an indefinite time, it will only wake up when something resets the board. So, we can wire something to the RST<\/span> pin and use it as an external wake up. It can be the press of a pushbutton or a magnetic reed switch being close, for example.<\/p>\n\n\n\n The ESP8266 resets when the RST<\/span> pin goes LOW.<\/p>\n\n\n\n To test this method, wire a pushbutton to the RST<\/span> pin. You need the following components for the circuit:<\/p>\n\n\n\n You can use the preceding links or go directly to MakerAdvisor.com\/tools<\/a> to find all the parts for your projects at the best price!<\/p> If you’re using an ESP8266 12-E NodeMCU kit<\/a>, follow the next schematic diagram.<\/p>\n\n\n\n If you’re using an ESP-01<\/a>, you can follow the next schematic diagram.<\/p>\n\n\n\n Upload the following code to the ESP8266 as main.py<\/em>.<\/p>\n\n\n View raw code<\/a><\/p>\n\n\n\n In this case, you just need to call machine.deepsleep()<\/span> after the execution of the main code.<\/p>\n\n\n\n When you call machine.deepsleep()<\/span> without any arguments, the ESP8266 will go into deep sleep mode indefinitely until you press the RST<\/span> button. <\/p>\n\n\n\n After wiring the circuit and uploading the code, you can test your setup. Every time you press the pushbutton that is connected to the RST<\/span> pin, the ESP8266 resets and wakes up. It blinks the on-board LED and goes back to sleep.<\/p>\n\n\n\n We hope you’ve found this project about deep sleep with the ESP8266 useful. We have other tutorials about deep sleep that you might like:<\/p>\n\n\n\n If you want to learn more about programming the ESP32 and ESP8266 boards with MicroPython, take a look our eBook: MicroPython Programming with ESP32 and ESP8266<\/a>. <\/p>\n\n\n\n Thanks for reading.<\/p>\n","protected":false},"excerpt":{"rendered":" This guide shows how to use deep sleep with the ESP8266 and how to wake it up with a timer or external wake up using MicroPython firmware. If you have … <\/p>\nPrerequisites<\/h2>\n\n\n\n
Introducing Deep Sleep<\/h2>\n\n\n\n
only 20uA. <\/p>\n\n\n\n![\"Deep](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/table-deepsleep-datasheet.jpg?resize=1024%2C462&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nTimer Wake Up<\/h2>\n\n\n\n
![\"timer](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/02\/timer-wake-up.png?resize=150%2C150&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\ndef deep_sleep(msecs):\n #configure RTC.ALARM0 to be able to wake the device\n rtc = machine.RTC()\n rtc.irq(trigger=rtc.ALARM0, wake=machine.DEEPSLEEP)\n # set RTC.ALARM0 to fire after Xmilliseconds, waking the device\n rtc.alarm(rtc.ALARM0, msecs)\n #put the device to sleep\n machine.deepsleep()<\/code><\/pre>\n\n\n\nScript<\/h3>\n\n\n\n
# Complete project details at https:\/\/RandomNerdTutorials.com\/micropython-programming-with-esp32-and-esp8266\/\n\nimport machine\nfrom machine import Pin\nfrom time import sleep\n\nled = Pin(2, Pin.OUT)\n\ndef deep_sleep(msecs):\n # configure RTC.ALARM0 to be able to wake the device\n rtc = machine.RTC()\n rtc.irq(trigger=rtc.ALARM0, wake=machine.DEEPSLEEP)\n\n # set RTC.ALARM0 to fire after X milliseconds (waking the device)\n rtc.alarm(rtc.ALARM0, msecs)\n\n # put the device to sleep\n machine.deepsleep()\n \n#blink LED\nled.value(1)\nsleep(1)\nled.value(0)\nsleep(1)\n\n# wait 5 seconds so that you can catch the ESP awake to establish a serial communication later\n# you should remove this sleep line in your final script\nsleep(5)\n\nprint('Im awake, but Im going to sleep')\n\n#sleep for 10 seconds (10000 milliseconds)\ndeep_sleep(10000)\n<\/code><\/pre>\n\tHow the Code Works<\/h3>\n\n\n\n
import machine\nfrom machine import Pin\nfrom time import sleep<\/code><\/pre>\n\n\n\nled = Pin(2, Pin.OUT)<\/code><\/pre>\n\n\n\ndef deep_sleep(msecs):\n #configure RTC.ALARM0 to be able to wake the device\n rtc = machine.RTC()\n rtc.irq(trigger=rtc.ALARM0, wake=machine.DEEPSLEEP)\n # set RTC.ALARM0 to fire after Xmilliseconds, waking the device\n rtc.alarm(rtc.ALARM0, msecs)\n #put the device to sleep\n machine.deepsleep()<\/code><\/pre>\n\n\n\nled.value(1)\nsleep(1)\nled.value(0)\nsleep(1)<\/code><\/pre>\n\n\n\nsleep(5)\nprint('Im awake, but Im going to sleep')<\/code><\/pre>\n\n\n\ndeep_sleep(10000)<\/code><\/pre>\n\n\n\nUploading the Code<\/h3>\n\n\n\n
![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/05\/enable_deep_sleep_esp8266.png?resize=579%2C389&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nDemonstration<\/h3>\n\n\n\n
![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/05\/esp8266-deep-sleep-timer.png?resize=650%2C209&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nDeep Sleep with ESP-01<\/h2>\n\n\n\n
![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/esp-01.png?resize=199%2C296&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/Slide21.png?resize=773%2C715&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n
\n\n\n\nExternal Wake Up<\/h2>\n\n\n\n
![\"external](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/02\/external-wake-up.png?resize=175%2C125&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nSchematic Diagram<\/h3>\n\n\n\n
![](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/header-200.png?w=1200&quality=100&strip=all&ssl=1\")
<\/a><\/p>\n\n\n\n![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/05\/esp8266-external-wake-up-micropython_bb.png?resize=895%2C567&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/esp-01-pushbutton_bb.png?resize=668%2C770&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nScript<\/h3>\n\n\n\n
# Complete project details at https:\/\/RandomNerdTutorials.com\/micropython-programming-with-esp32-and-esp8266\/\n\nfrom machine import deepsleep\nfrom machine import Pin\nfrom time import sleep\n\nled = Pin (2, Pin.OUT)\n\n#blink LED\nled.value(0)\nsleep(1)\nled.value(1)\nsleep(1)\n\n# wait 5 seconds so that you can catch the ESP awake to establish a serial communication later\n# you should remove this sleep line in your final script\nsleep(5)\nprint('Im awake, but Im going to sleep')\nsleep(1)\n\n#sleep for indefinite time\ndeepsleep()\n<\/code><\/pre>\n\tDemonstration<\/h3>\n\n\n\n
![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/05\/ESP8266-Deep-Sleep-External-Wake-Up-Pushbutton-MicroPython.jpg?resize=750%2C421&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\nWrapping Up<\/h2>\n\n\n\n