![]() ![]() ![]() XPDDCDC MCU pin in not connected to RESET pin. There is one catch: ESP-01 is capable to enter deep sleep, but unable to restart and resume operation. ![]() When in deep sleep, ESP8266 disables almost all of its functions and reboots after specified period of time. Unfortunately, the ESP-01 module does not support this (without. GPIO2 is directly connected to the Switch, or to a sensor so it can always read the state of the switch or sensor. There is a way to make ESP-01 work for months using something called deep sleep mode. It can then connect to WiFi, transmit the data payload, then go back to Deep Sleep again. The ESP8266 does what it needs to do and when it is done the program sets GPUIO0 LOW and the chip powers down. Once booted, GPIO0 should be set to HIGH in the software so the CH_PD pin remains HIGH, even when the switch is opening again. When the switch closes, the CH_PD pin as well as GPIO0 and GPIO2 are taken HIGH and the ESP8266 powers up. This is according to an idea by ‘barnabybear’. For this we do not use the regular deep sleep but we will power down the ESP8266 by pulling the CH_PD (=chip power down) pin LOW to Power it down whereas a Switch (or a HIGH output from a sensor) will Power the ESP8266 up and a gpio pin is used to keep it powered up as long as necessary. That is not much but it can be brought down even further to 3uA. What is it: ESP8266 that is powered by solar cells and capacitor banks for batteries, ESP runs in deep sleep mode and then sends an HTTP POST request every. In deep sleep the current consumption is about 20uA. You need some way to keep the ESP running til it’s job is finished and this means it needs to maintain power and thus the regular ‘deep sleep’ seems the only option. This concept will not work though if the switch prematurely is deactivated and the ESP8266 has not finished its job yet. This seems ideal for the ESP8266-01 that does not have gpio16 broken out and therefore is hard to use in regular deep sleep. Opening a mailbox or opening/closing a door activates a Switch that connects the Vcc to 3V3 and the ESP8266 boots up and does its thing. A typical example of that is a notifier that mail has been delivered or a door has been opened. Serial.println("Wakeup without WiFi next time") ĮSP.deepSleep(5000000, WAKE_RF_DISABLED) // radio disabled after wakeupĪny idea what's wrong? I really need this project to go fast and I'm blocked here.The easiest way to save power on an ESP8266 is in fact to switch it OFF when not needed and Switch it ON when needed. Serial.println("Deep sleeping for 5 seconds.") Serial.println("WiFi connection failed") WiFi.forceSleepWake() // wakeup WiFi modem PinMode(2, OUTPUT) // GPIO02 on ESP-12 module is linked to on-board LED Actually, I used a simple sketch I found on the web which just blink the led on the esp, and even with this one, I had 10mA in deep sleep mode : #include ![]() It is pretty long and I don't want to bother you with that. This is especially useful with nodes that operate on batteries and therefore need to conserve as much energy as possible. My sketch is basically getting values from different sensors, connecting to wifi to send data to a server via ftp (based on the SurferTim's FTP code ( Arduino Playground - FTP)). The deepsleep component can be used to automatically enter a deep sleep mode on the ESP8266/ESP32 after a certain amount of time. But I read a few articles where people also had 10mA in deep sleep mode. The deepsleep component can be used to automatically enter a deep sleep mode on the ESP8266/ESP32 after a certain amount of time. It is possible that the NodeMCU has not been deep-sleeped correctly. ![]()
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