The new ESP32-S3 module - Extreme low power 1nA! ELPM-S3 by OBJEX

Hello, Salvatore! Can you explain better you sheet where you compare the esp32-s3 with the objex module? It is 200 interactions during 10sec per day?

That shield looks too pricey for a $2 module.

Amazing project!

I really appreciate your content. That's specialised yet it's qualitative.

Что можно собрать на этом контроллере?

First off let me say what a great job you did. I would love to get my hands on of those modules. And, I would definitely use it in my projects if the price is not to far off from the ESP32-WROOM-S3 module. For just a few one-off hobby projects the price doesn't really make a big difference, even if it is like 2 or 3 times the price. If I really need low power consumption it is worth it. So, if it is just a few modules I would use it. But, for large batches, the price of each component is a serious thing to always be aware off. And it might turn out to be to expensive to use and drive the price for the consumer up too much. But again, very nice job!

Amazing...

mio padre

nice project I am also work on it. but in my opinion Keithley DMM6500 is better way to measure amper. Thanks!

What kind of display is this?

I think it would be nice to have this in the same form factor as the WROOM-1/1U modules. That way, some projects already using those modules could potentially see power consumption benefits possibly without needing to redesign other parts of the project.

I‘m a bit interested in how you designed the pcb to pass through in that way i somehow struggle when it’s two sided + and i have pads on both sides..

Is this thing somehow certified?

Is the RTC the RV3028-C7? I used this one in my projects before to do the same as shown here, just not on the ESP module itself. Powerful little thing. Only downside is the cost of the RTC if purchased in small quantities.

I like the design and the idea... It's hard to find super low power stuff that's easily hackable! If I'd add anything, it would be mounting holes or some other way to mount it. It doesn't look like there's much to grab onto.

Where can i buy one of these esp32?

This microcontroller is gonna outlive that damn solar lamp that has been running day and night for 10 years on 1 nicd battery

guess what you wouldnt be able to offerd it (me as well) :D

where to buy?!
please do a version with embedded antenna as well, maybe smd ceramic will be cool! this is very high end stuff!
does it have a battery recharge capabilty? I can't find it on the docs.
complimenti!

if paired with a super small solar cell as a replacement or modified shield u could have a system that never dies it seems. kind of a cool thought

Hi from Italy. Very good project by the way, however, the only limitation that I see using this in my projects may be the loosing of the ESP32 internal RTC memory (I assume that you cut off the current to the MCU) that I use to share data (a JSON parsed) between active periods. ESP32 RTC memory is the only efficient way to maintain data after a deepsleep reset without involving NVM or writing to the flash killing it. I’ve never used an external RTC so I don’t know if those modules allows also to store this type of data, it can be very handy.

What an exciting adventure. I'd keep it in mind for my future projects.

Awesome project! Maybe you can mitigate the soldering problem with using conductive epoxy instead? There are quite cheap and should be conductive enough. Also some people just use plastics that are spray painted with carbon filled acrylic.

For the power latch it would be really cool if the circuit could be triggered by a wireless powered external signal 😅

I love this, but it looks difficult for newbees to solder... If it could be put into a longer/narrower package, with all of the pins exposed to the edge, it would
make it easy to use and breadboard friendly...

One feature I would really need is a dual i2c port, so that
I could have on-board i2c devices on a private i2c bus and
be able to talk to the board externally as a i2c slave.

Great project, congratulations! Is it 1nA with the RTC on, or just wake up from an external signal/interrupt?

Hey man I watched a few of your low power projects and I'm wondering maybe you could add an accelerometer for impact logging/tamper detection/orientation change to detect unauthorized physical access to the module or for theft detection. ST Microelectronics has new accelerometers (LIS2DU12/LIS2DUX12) that can be always on and use less than 11uA at full performance and they even have AI. ST also has a new IR sensor (STHS34PF80) that can be used for presence detection and it uses about 10uA. Maybe you can check them out

Looks like a great project - but I'm a little confused by your statements and visuals in the video when you are talking about current comparison when the S3 is in deep sleep. The S3 cannot go lower than 6-7uA when in deep sleep, when being power by a correct and stable voltage, so how a you possibly claiming nA instead of uA when in deep sleep?

If the ESP32-S3 actually sleeping or is it just powered down?

Great initiative ! I did something similar with an external PCB with latch / super low-power timer / charger, to put in front of any ESP. But having this so integrated in the size of an original ESP32 is a smart idea !

Interesting project, Wouldn't mind picking a few up if they become available :)

"Lowest sleep power ESP32" ... adds internal RGB LED. LOL ... oh wait a minute! YOU MADE THIS AS A HOBBYIST?!!!! I thought it was a new product from Espressif! Well done!

Hi, awesome work👏. The results look amazing.

I had a few queries. In the product brief you mentioned that you power down the micro entirely. Wouldn't this erase all variables/data stored on the sram?

Some applications that I worked on relied on retaining a small amount of state info to resume where they left off.
A workaround for systems with no memory retention is to write state data to flash before power down and read it back during power up. But this method is unreliable due to limited number of write cycles allowed by most nand flash modules (at 10sec duty cycle over a course of 10 years you will write ~30million times, way above nand flash endurance).

So a future modification can be adding an optional small external sram ic that is powered even in the "deep sleep". All modern low power mcu ( even esp32s3) have some sort of limited ram retention in deep sleep. This would remove some limitations of the current design from software development perspective.

This applies only if you intend to use the module for such tasks ofcourse. If not ignore the above 😂 .

Anyways awesome work once again. I wish you best of luck 👍.

Very cool. In the past little solar projects have been unfeasible / impractical with ESP32. I'm staying tuned!

Brilliant! Of course I would use it in my Smart Knob project. I assure!!!

Nice work!!...cheers.

where to buy

I'm really looking forward to any progress in this project and I would love to see more board designs with extreme focus on deep sleep low power consumption like what you're doing here.
Have you also looked into the ESP32-C6?
This one supports 802.11ax (wifi-6) which has a nice feature called Target Wake Time (TWT).
It essentially allows you to remain connected to the AP (if supported by the AP of course) so you don't need to re-connect when waking from deep sleep.
The ESP32-C5 (which has been announced about 18 months ago, but no sign of any silicon since) also claims to support this but then on 5 GHz too.

I would love to finally have ESPEasy nodes (I'm the dev of ESPEasy by the way) run on simple batteries for months to years.
So keep up the good work!

good work...please mass produce it

Fantastic work and it sounds like espressif should take note of your ideas.

Very nice work. Can it work with external Sensor Interupts in the classical way? I would be interested in a project like this with the ESP32 C3. And of course, what are the production costs of the samples?

My sensor i want to build is powered by a single Lipo Cell, and should be woken up by a sensor like a MPU6050 or LIS3DH and send some data via WiFi. At the moment I'm using the old ESP32, but even with a lot of DeepSleep and reduced Speed etc, a 2000mAh Battery lasts maybe 3 days, because the current draw is around 20mA the whole time

1. Music is way too loud (notice that biggest yt channels don't use music at all)
2. Need to have a version with built in antenna
3. Need to cost almost the same as original wroom modules
4. Castellated holes are way easier to solder

Hi, wow, that's a awesome project. I'm working on my personal project which includes two devices with the ESP32-S3, and the one that requires to be powered with a lifepo4 cell only works for 2,5h. The two devices must be connected by ESPNOW protocol and I can't put on sleep mode because the RF module doesn't work on deep sleep.
That's the reason I changed to the NRF52 modules, they consume less than the ESP32-S3 (both in active mode).

Your solution could have a big welcome for all those projects that need low consumption when active and being powered by batteries.

Which is the power consumption of your design when it's in active mode using RF module?

Nice work and I wish you all the best for this project.

can you share a little bit more about how the extreme power saver mode works with Wi-Fi? how does it keep sending beacons/probes?

Can you make a video on the software you are using for the measurements?

Very impressive! Keep going!

I think this is a solid project, I'd say having one with integrated antenna is a must. Also that aluminum shield looks like it's going to soak up and dissipate a lot of heat.. harder to DIY heatgun solder and reflow, consider a version that uses 'Castellated Holes' at the cost of a slightly wider footprint, or perhaps an SMD to dual-pin breadboard adapter.

The first thing you want people to be able to do is immediately upload a Hello World blinking led sketch, if it doesn't have a quick dev-path to do that, immediately committing to ordering PCBs to house a project we've never programmed is a 'no-bueno' often. Remember you are the creator so you've all the tools to work around that, and know it's intricacies and uncertainties.

thing is... aa/aaa batteries are probably going to leak way before you run out of power

I can see it being useful for outdoor/ disconnected applications where small renewables are used as power sources. Great work.

I would buy it

So good and interesting 👏🏻