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ESP32-S2 replacing Pico D4 - ESP NOW support, RTC and deep sleep
Posted: Tue Nov 24, 2020 11:52 am
by timmbo
Dear all,
we are currently evaluating the ESP32-S2 (ESP32-S2FH2 or ESP32-S2FH4) as a replacement chip for the Pico D4 (4MB Flash) and have some questions after looking into the datasheet:
[*] Is ESP NOW already supported?
[*] Is an external crystal / oscillator needed in the hardware design or does the chip have an integrated one like the Pico D4?
[*] The datasheet mentions a deep sleep current (RTC timer + RTC memory) of 25uA. Is this really the case? The Pico D4 only needs 2.5uA.
Very happy about any kind of information!
Thanks & Greetings,
Timm
Re: ESP32-S2 replacing Pico D4 - ESP NOW support, RTC and deep sleep
Posted: Sun Jan 24, 2021 8:12 pm
by timmbo
Dear all,
sorry for pushing this. Nobody around to answer any of these questions? Especially the deep sleep current compared to the Pico D4.
Best, Timm
Re: ESP32-S2 replacing Pico D4 - ESP NOW support, RTC and deep sleep
Posted: Sun Jan 24, 2021 10:14 pm
by WiFive
[*] Is ESP NOW already supported?
Should be
[*] Is an external crystal / oscillator needed in the hardware design or does the chip have an integrated one like the Pico D4?
Yes, needed
[*] The datasheet mentions a deep sleep current (RTC timer + RTC memory) of 25uA. Is this really the case? The Pico D4 only needs 2.5uA.
The minimum deepsleep current in the datasheet was changed from 5uA to 20uA so probably
Re: ESP32-S2 replacing Pico D4 - ESP NOW support, RTC and deep sleep
Posted: Mon Jan 25, 2021 6:53 am
by timmbo
WiFive wrote: ↑Sun Jan 24, 2021 10:14 pm
[*] Is ESP NOW already supported?
Should be
[*] Is an external crystal / oscillator needed in the hardware design or does the chip have an integrated one like the Pico D4?
Yes, needed
[*] The datasheet mentions a deep sleep current (RTC timer + RTC memory) of 25uA. Is this really the case? The Pico D4 only needs 2.5uA.
The minimum deepsleep current in the datasheet was changed from 5uA to 20uA so probably
Hi WiFive, thanks for your answers! That already helps a lot. Unfortunately we need to decide against the ESP32S2 for new hardware designs, due to the high deepsleep current and the additional RTC component (our device needs to be tiny).
Best
I²C pins _ ESP32- Pico D4
Posted: Wed Feb 03, 2021 3:25 pm
by Tlili younes
hi everyone,
Can someone help me, what are the I²C pins of the esp32 pico d4 ? I
can't find in the data sheet
Re: I²C pins _ ESP32- Pico D4
Posted: Wed Feb 03, 2021 4:52 pm
by timmbo
Tlili younes wrote: ↑Wed Feb 03, 2021 3:25 pm
hi everyone,
Can someone help me, what are the I²C pins of the esp32 pico d4 ? I
can't find in the data sheet
By default it's GPIO22 = SCL, GPIO21 = SDA. But they can be mapped as well.
Best
Re: ESP32-S2 replacing Pico D4 - ESP NOW support, RTC and deep sleep
Posted: Wed Feb 03, 2021 4:53 pm
by ESP_Minatel
Hi,
You can use any GPIO for the I2C peripheral due the IO multiplexing. Just be sure to choose one with no shared function or input only IO.
Be aware of the strapping and flash IOs.
See in the datasheet:
These pins can be multiplexed with other functions, suchas the SDIO, UART, SPI, etc. (More details can be found in the Appendix, TableIO_MUX.)
https://www.espressif.com/sites/default ... eet_en.pdf