- Fri Apr 03, 2015 10:50 am
#13368
Okay, I built something that manually shuts down the power to the ESP when it's not needed. Takes a few Rs and 2 mosfets, but the end result is 30x more efficient.
- Fri Apr 03, 2015 10:52 am
#13369
I don't believe the Amazon thing is powered unless the button is pressed. ie the button is in the battery circuit.
Then when you press the button the device boots and quickly turns the LED red. Keep holding and the code runs that posts the URL. When the URL replies the LED goes green and you can let go of the button.
Device is initially set to boot and look for network credentials, so you hold the button. It starts blinking blue. When it finds the credentials it turns solid blue. Now let go of button, and press again. Now it switches to red/green mode since it has a URL.
Of course Amazon thing has not shipped so no one has seen it for real.
Your idea with MOSFET is probably even better. Use button push to get CPU initially going, then it can shut itself off via MOSFET.
Then when you press the button the device boots and quickly turns the LED red. Keep holding and the code runs that posts the URL. When the URL replies the LED goes green and you can let go of the button.
Device is initially set to boot and look for network credentials, so you hold the button. It starts blinking blue. When it finds the credentials it turns solid blue. Now let go of button, and press again. Now it switches to red/green mode since it has a URL.
Of course Amazon thing has not shipped so no one has seen it for real.
Your idea with MOSFET is probably even better. Use button push to get CPU initially going, then it can shut itself off via MOSFET.
- Fri Apr 03, 2015 10:56 am
#13370
Maybe the push button controls the MOSFET circuit and it is not hooked to the ESP8266 at all. ie push the button and the MOSFET turns on and latches on. Then later the ESP8266 can use a GPIO to turn the MOSFET off. That should consume zero power after the MOSFET is off, right?
- Fri Apr 03, 2015 10:59 am
#13371
After you use the button to turn on the MOSFET and get it latched on, you can probably figure out a way to read more button presses using a GPIO the ESP8266. Then a second GPIO could be use to shut the power off when finished.
