ESP8266 ESP-01 Low Power Mode – run it for months

Amazing ESP8266 ESP-01 WiFi boards have pretty irritating problem: theirs power consumption is pretty high. Minimal power consumption of about 70mA when doing nothing and above 100mA when when transferring data makes it rather impossible to use it on battery power for a longer period of time. Set of 2 AA batteries would be drained in less than a day. Not good.

There is a way to make ESP-01 work for months using something called deep sleep mode. When in deep sleep, ESP8266 disables almost all of its functions and reboots after specified period of time. There is one catch: ESP-01 is capable to enter deep sleep, but unable to restart and resume operation. XPD_DCDC MCU pin in not connected to RESET pin. To fix it, you would have to solder thin wire between XPD_DCDC and RESET pin just like on a picture below:

ESP8266 ESP-01 Deep Sleep hack

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Testing quadcopter drones at home

I think everyone who owns a drone would like to be able to test it at home. No wind, no rain, close to computer and all required tool. But… If you do not have a very very big room that might not be a best idea ever. Limited space makes everything extremely dangerous. Specially in case of untested aircraft. Human body is fragile, quadcopter is a delicate device and propellers can spin quite fast.┬áLuckilly there is a way to test at least some aspects of multirotor flight at home. You just need some kind of harness that will prevent drone from getting out of control and smashing into anything.

To create simple harness you will need 4 pieces of rope and something to attach them to. Like chairs. Or table. Or any other furniture. It only has to be heavy enough to support weight of your drone.

Quadcopter harness

In more advanced version, like I did, you can attach to 2 wooden board to a basement/garage walls or bookstand. Just like on a picture above.

Will it work? Of course! Like that, for example:

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