ESP8266 Community Forum

- Sun Apr 03, 2016 7:40 am #44721 Just engage a multimeter and measure the current consumption for several measuring cycles.
Shortening the cycles for measurement will make this less boring
Then we can draw conclusions ...

- Sun Apr 03, 2016 8:06 am #44728 BTW, Is your voltage regulator really a 78xx ? Those are not LDO (Low dropout), so you will get too low voltage at the output when the battery is 3.7V, probably you will get around 1.7V output.
You need to have some LDO such XC6302, SPX3819 or HT7333 which provide low dropout as well as low quiescent current.

Don't forget also to have GPIO15 pulled-down and RES/CH_PD/GPIO2/GPIO0 pulled up.

- Sun Apr 03, 2016 8:29 am #44729

BTW, Is your voltage regulator really a 78xx ? Those are not LDO (Low dropout), so you will get too low voltage at the output when the battery is 3.7V, probably you will get around 1.7V output.
You need to have some LDO such XC6302, SPX3819 or HT7333 which provide low dropout as well as low quiescent current.

Don't forget also to have GPIO15 pulled-down and RES/CH_PD/GPIO2/GPIO0 pulled up.

Thanks.

The voltage reg is definitely one of these: https://uk.rs-online.com/web/p/low-drop ... s/0403888/

In Frtizing I didn't have a library drawing of it so I just used a standard voltage reg pin out.

I've never bothered with the pull-up/down resistors - apart from when I need to flash the chip. If I stick pull ups on there then that will increase the current draw surely? It's not having a problem waking and sleeping. It works fine for about 4 days then the battery runs out of sufficient juice to wake up the Wifi...

- Sun Apr 03, 2016 8:30 am #44730

Just engage a multimeter and measure the current consumption for several measuring cycles.
Shortening the cycles for measurement will make this less boring
Then we can draw conclusions ...

Thanks - I will try and get that done this evening.