Hey,

the posted code is specific for the ESP32 Pico D4. Maybe different hardware?

Best

Thanks a lot for your answer. This is quite a surprise, making the chip basically not usable for battery operation. Are you sure on that? On

https://products.espressif.com/#/product-comparison

it says the ESP8684 has RTC SRAM of 8 KB?

Best

Hi all,

just a quick questions regarding the ESP8684H2: Does the chip have any onboard RTC memory (i.e., can memory be retained after deep sleeps)?

Thanks & Best

Hey there, we have a customly designed board based on the ESP32 Pico D4. After producing more than 300 pieces we found out that the light sleep current in unicore mode (CONFIG_FREERTOS_UNICORE=y) is very different between ESP32 Pico D4 modules. We measure for some chips 400uA and for others up to 1....

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

[*] 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...

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

Hi Felix,

thanks for your answer. My problem was that the SOC did not wake up at all. I found the reason though: I'm using PlatformIO where all compilers and tools were up to date except the ULP compiler. After updating the framework it now works.

Best, Timm

Hey there, I don't know why, but I can't wake up the SOC (pico D4) from deep sleep by the ULP Coprocessor. The ULP code is running correctly, incrementing a variable that I can successfully read out when waking the SOC by the timer. Code is simple: static void init_ulp_program(void) { ulp_x = 0; ESP...

Did you set the mux for gpio9 to uart1 rx Hey there, I know the thread is some months old, but I have the same problem. Can you please give us a hint on how to set mux for gpio 9 to uart1 rx? For UART0 everything works fine, also the wake up, but for UART1 it does not work: //gpio_iomux_in(GPIO_NUM...