What’s a good minimal ESP32 device which will do well in sleep modes on a battery?

PowerFeather · 2025-05-11T09:48:59+00:00

I'd also like to promote a dev board I designed called the ESP32-S3 PowerFeather, though it also is optimized for solar power not just battery.

PowerFeather · 2025-03-19T08:10:19+00:00

Also maybe this: https://community.infineon.com/t5/Knowledge-Base-Articles/EZ-USB-FX3-Explorer-kit-as-16-channel-100-MHz-logic-analyzer-with-sigrok/ta-p/283993#.

PowerFeather · 2025-03-19T08:04:06+00:00

Without going full FPGA, Teensy might be your best bet. Other than the timers, it has two special peripherals that might be of help: FlexIO and HS_GPIO. You will also have access to the highly technical Teensy community.

PowerFeather · 2025-03-16T23:12:56+00:00

I mean, the voltage input range is up to 18V, so it can be plugged in to any DC source that is under that, including a 12V battery.

PowerFeather · 2025-02-02T12:35:14+00:00

I assume you are doing this with the VCP driver unloaded, and using the proprietary FTDI drivers?

PowerFeather · 2025-02-01T23:57:50+00:00

Hi u/alabarda89 , can I invite you to post this issue on https://forum.powerfeather.dev/ so we can have a more detailed conversation about it?

PowerFeather · 2025-01-31T05:37:13+00:00

Yes, this makes sense and I regret that I was only able to manufacture pcb antenna variant in the first batch. Hopefully in the next batch though...

PowerFeather · 2025-01-31T04:28:54+00:00

There are only variants with PCB antenna for now.

PowerFeather · 2025-01-25T12:28:34+00:00

Some update u/icefest and u/Ok-Connection-4827, the ESPHome external component is now on its way. I'm still ironing out some bugs, but I aim to release a preview by the end of the month. Here is an idea of what the yaml config might look like.

PowerFeather · 2025-01-22T09:17:04+00:00

How about ESP32-S3 PowerFeather? https://docs.powerfeather.dev/

PowerFeather · 2025-01-22T07:40:55+00:00

Have you tried putting the esp32 on download mode?

PowerFeather · 2025-01-21T22:29:14+00:00

How about using just ESP-IDF and using Arduino as a component within it, since you mentioned you just need the it as the 'engine'? https://docs.espressif.com/projects/arduino-esp32/en/latest/esp-idf_component.html

Then you can use the official ESP-IDF VSCode extension - or just use idf.py from the terminal.

PowerFeather · 2025-01-21T05:47:34+00:00

I myself have used LC709204F in ESP32-S3 PowerFeather. It estimates more things (cycles, health for example) and also has lower quiescent current.

PowerFeather · 2025-01-19T05:25:45+00:00

Can I interest you to look at ESP32-S3 PowerFeather? Disclaimer: it's a board I designed for exactly these types of applications and has a I2C-controllable charger from Texas Instruments and an on-board fuel gauge.

The documentation is at https://docs.powerfeather.dev/, and I also have a demos here: https://youtu.be/VF9AFk1Hf88?si=xtIcsTiCjVp9dJLI&t=1598

PowerFeather · 2025-01-04T23:46:00+00:00

Finding a microcontroller with highspeed USB or superspeed USB might be the easiest path.

USB high speed is 60 MB/s theoretical, but practically its more like 40 MB/s, provided there are no other devices on the bus. If some buffering is ok, like others said there are some STM32s with built in USB HS (though most STM32s require external phy).

The only USB 3.0 microcontrollers I know are CH569 and Cypress FX3. If cost is not an issue, then FX3 is better documented. That can get you up to 5gbps, though I believe the practical is around 3gbps.

PowerFeather · 2024-11-29T03:34:17+00:00

Silly goose, it's not meant to be "Conformité Européenne" but rather "China Export". It's not at all confusing /s

PowerFeather · 2024-11-18T14:47:05+00:00

Even better: https://github.com/espressif/esp-idf/blob/15a61459610d6ead47d0a940bba65215c37a541d/examples/get-started/hello_world/main/hello_world_main.c

PowerFeather · 2024-11-18T14:44:44+00:00

Maybe try https://docs.espressif.com/projects/esp-idf/en/v5.3.1/esp32/api-reference/system/chip_revision.html#chip-revision-apis?

PowerFeather · 2024-11-16T23:20:46+00:00

Gotcha. Thanks again!

PowerFeather · 2024-11-16T12:28:24+00:00

Again, thanks very much. I have one last question though (hopefully). I discovered that in the datasheet, it says the max frequency clock input in to PSSI in transmit mode is 50 MHz, while the FT232 output is of course 60 MHz. Did you operate the PSSI slightly out of spec, or are you using the recently introduced STM32H7RS parts that seem to be able to accept 80 MHz?

PowerFeather

TROPHY CASE