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chaeplin / esp8266_and_arduino

esp8266 mqtt node / esp8266
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Your circuit with self wake up #40

Closed Fettkeewl closed 3 years ago

Fettkeewl commented 7 years ago

Hi chaeplin, thank you for this great circuitry. I'm having issues making it work while also maintaining the ability to wake my device by software as well as an external event.

By using your circuit for the door alarm combined with a direct connection between gpio16 and rst I cannot wake my device from deep sleep with the reed switch.

I've deducted from various testings that the issues are with voltages. I can reset my device with your circuit as long as my esp is awake because the voltage at rst is held at 3.19V directly tied to gpio16. When the esp sleeps, voltage at rst is 3.3V and your circuit does not work anymore. I thick this somehow blocks rst from being grounded through the circuitry you have provided.

I've been thinking of adding a voltage divider between my gpio16 to rst connection to mimic the voltage I measured at rst while my esp is awake. Do you think this is a valid solution or have I misunderstood it all?

See my sketch: https://www.dropbox.com/s/141j6c6skuilrls/20170425_195826.jpg?dl=0

I'd appreciate your help, what I need is simple in concept, my esp to be able to awake by itself a well as upon a door being opened(Reed switch)

chaeplin commented 7 years ago

https://github.com/chaeplin/esp8266_and_arduino/tree/master/_48-door-alarm-deepsleep

check circuit, RST is only tied to a TR.

Fettkeewl commented 7 years ago

Yes I know, I understand your circuit, I was wondering if you had any idea as how to modify it to be able to wake esp by software as well as by hardware?

Fettkeewl commented 7 years ago

As I understand it with your setup you can only awaken the device via external event by opening reed switch, from deep sleep that is?

chaeplin commented 7 years ago

check my test graph, it works. change R and C .

chaeplin commented 7 years ago

as 16 is not tied to RST, wakeup only works with external trigger.

Marmachine commented 7 years ago

I guess this is exectly what i need. I'm using a WeMosD1 with DHT22 (temperature and humidity) sensor. The ESP reports the readings, then goes into deepsleep for 5 minutes. To have the device wake-up, i had to put a 470 Ohm resistor between GPIO16 (D0) and RST (a 1K resistor didn't work!) Best solution would be schottky diode (cathode to gpio16, anode to rst), second best is resistor (470 Ohm should work, depending on used rst-pullup) worst solution is a direct connect (wire) -> you will have problems reflashing then!

Now I want to connect a door contact (breaks when door opens) and a pir (motion) sensor. So i am about to implement your setup, because i will need an external trigger. But combined with the above! Could you tell if this setup would work? I'm waiting for my parts to arrive before i can test this. Cheers!

Midgie75 commented 7 years ago

I combined chaeplin's monoflop with Marmachine's idea to connect GPIO16 with RST with a resistor. In my setup I had to use a 2K. Now it works! The NodeMCU I am using wakes up from DeepSleep via GPIO16-RTC-signal and via an external interrupt from my proximity sensor (Adafruit VCNL4010). Thanx guys! If you like to take a look follow my link.