![]() ![]() I have tried switching the 10k pullup on RST with a 1k, to no avail. Here's the schematic, please note, the MCP73831/USB/LEDs section is not soldered-up whilst I debug the issue. I have breadboarded prototype that works fine, but my production pcb is not working correctly, it works first time then sleeps and doesn't wake up. A simple weather sensor that wakes up every 15 minutes and posts temperature, humidity and battery data to ubidots. and at the end of setup (end_of_setup = true).I'm having a bit of a nightmare with my ESP12 based circuit. Call this twice: in the beginning of setup (end_of_setup = false) If powered on (not a deep-sleep reset), nothing will happen. Deep-sleep for specified amount of hours, one hour at a time. You can put your device in modem-sleep with this command: 1 2 3 WiFi.disconnect () WiFi. ![]() It seems to go to sleep but then upon waking it hangs, I have a Node MCU v2 breakout board similar to this. Remember that deepsleep only works for about an hour so you have to contemplate this. Code: Select all ESP.deepSleep (10000000, WAKERFDEFAULT) // Sleep for 10 seconds. When you push, RST has GND so the ESP gets reseted. But if you don’t use WIFI for a while, the better thing is to put the device in Modem-sleep. You can't stop deepSleep, all you can do is reset the board so connect the button to the reset pin and make the appropiate set-up: Connect a pullup resistor (10k) in RST. The function I used to set the counter and deep-sleep is listed below. This is the default state of esp8266, but normally you interrupt this state when connect device via WIFI. The modes and APIs can be found in the documentation. This also seems true whether calibrating the radio or not - in theory not calibrating should consume less energy. According to power measurements, the ESP8266 consumes about 170 mA of current for a second when waking up. After that, radio will be disabled on wake up until it's time to actually do something, in which case the radio is enabled. I'm putting the ESP to sleep using Code: Select all ESP.deepSleep (10000000, WAKERFDEFAULT) // Sleep for 10 seconds It seems to go to sleep but then upon waking it hangs, I have a Node MCU v2 breakout board similar to this. To save battery in theory, I made it so that the first time it powers on (not waking from deep-sleep), it will calibrate the WiFi radio once. Using the internal RTC, improving meassurement of time passage during sleep apparently includes guessing at the sleeping chip's temperature: Time keeping on the ESP8266 is technically quite challenging. This approach uses the RTC memory to keep track on how many times it has awakened. It is suggested using an external RTC if time tracking is of importance. ![]() ![]() I decided to make the ESP8266 sleep one hour at a time. In my testing I noticed it sometimes slept for 3 hours, sometimes for 6, and then sometimes it didn't wake up at all. One would put it to sleep like this: ESP.deepSleep(ESP.deepSleepMax()). With any larger value it never wakes up.Īlso apparently, this was later changed so that the ESP can sleep for a few hours at a time, but it's not constant at all for how long - the length depends on the state of the RTC. I want to wake up my ESP8266 from deepsleep using any of various external buttons. Since the ESP.deepSleep function takes the time in microseconds, a quick calculation ( 4294967296*1e-6/60 = ~71.58) shows it can sleep a maximum of approximately 71 minutes at a time. When the current iteration of this programm is done, it simply turns its own power off again. Apparently, originally it supported only 32 bit integer values. When the power switch is pressed (or a door is opened), one of the first things the ESP8266 needs to do is latch the power on. Even if just lying on the soil, the setup actually doesn't stick out that much.Įverything went well until I realized the deep-sleep function of an ESP chip is very unreliable. ![]()
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