MicroPython Forum (Archive)

Jep, get an ESP Module with more Pins. ESP32 modules are not expensive!

Why don‘t you use a simple GPIO Pin with a relay? On startup the Pin goes high and the relay (driven through a transistor) switches Power to the Sensor. On deepsleep the Pin goes into high impedance and the relay switches off. Maybe you can also use a FET directly instead of the relay.

Not much :-) The ESP32 still works fine, but without a power IC you need to power the 3.3V rail directly. Which is not that bad because it accepts between 2.3V and 3.6V. The USB2serial Chip is gone, so no USB anymore. And after removing the pullups for the SD Card I'm not quite sure if the SD Card w...

I just blowed some resistors of the board and this is the outcome:

Without voltage regulator (providing 3.3V directly on the rail): 100 µA
Without the Voltage Divider from the Power IC: 90 µA
Without the pullups for the SD Card IO Lines: 5 µA

So I think I'm pretty much done

Converting javascript to python is no easy task and I doubt that there is a tool for that apart of your own brain...

Phew, okay that sound resonable!

Just ask if you have any problems building the firmware!

Just a question: Why do you think you need double precision?
I think most calculation are accurate enough with single precision floating point.

Hardware floating point only means "floating point in hardware". Micropython can do any floating point in software. This will be considerably slower for a CPU, but as a human you won't notice any difference in speed.

Hi matty,

thats exactly why I ordered some of those TinyPICOs

Cheap chinese development boards haven't got poer efficency in mind!

I'll try blowing of some resistores and will post the outcome here.

Blowing the power IC off was a success. I'm down to 100 µA.
Any suggestions what I can try next? The ESP32 should go down to about 10 µA, so there must be still something which is drawing a tiny bit of power...