ESP32 WROVER pSRAM Quiescent current

kilobyte_ch
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ESP32 WROVER pSRAM Quiescent current

Postby kilobyte_ch » Thu Nov 16, 2017 12:27 pm

Hello

I'm just asking if and how big the difference of the quiescent current between the ESP32 WROVER and ESP32 WROOM Module should be in deep sleep mode.

Thanks

Kilobyte

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loboris
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Re: ESP32 WROVER pSRAM Quiescent current

Postby loboris » Thu Nov 16, 2017 2:57 pm

Maximal standby current of ESP-PSRAM32 is 50 uA, but it is powered by VDD_SDIO and is powered down before entering deep sleep (same as Flash chip).
As a result, there is no difference in current consumption in deep sleep between ESP32 WROVER and ESP32 WROOM Module.

ginodecock
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Re: ESP32 WROVER pSRAM Quiescent current

Postby ginodecock » Wed Dec 20, 2017 9:43 pm

Hi,

I measure when using the same code the esp-wroom-32 uses 7uA and the esp32 wrover uses 80uA. The underlying pcb is also the same.

I wonder what is extra needed for the esp32 wrover to get to the low current usage.

Thanks,

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loboris
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Re: ESP32 WROVER pSRAM Quiescent current

Postby loboris » Fri Dec 22, 2017 5:15 pm

ginodecock wrote:Hi,

I measure when using the same code the esp-wroom-32 uses 7uA and the esp32 wrover uses 80uA. The underlying pcb is also the same.

I wonder what is extra needed for the esp32 wrover to get to the low current usage.

Thanks,
At the moment I only have esp32-wrover on ESP-WROVER-KIT board which is not suitable for deep sleep power consumption measurement.

I've tested deep sleep power on ALB32-WROVER module (with 8MB Flash & 4MB psRAM) which probably has the same internal schematics as ESP32-WROVER and the results are:

- 5.5 uA when only RTC timer wake-up & wake-up from GPIO are enabled
- 32 uA when ULP wake-up is also enabled
- 300 uA when touch wake-up is enabled

Tested with deep sleep example from latest esp-idf.

To get this power consumption I had to configure some GPIOs at the begining of app_main():

Code: Select all

void app_main()
{
    gpio_pad_select_gpio(12);
    gpio_set_direction(12, GPIO_MODE_INPUT);
    gpio_set_pull_mode(12, GPIO_FLOATING);
    for (int i=32; i<34; i++) {
        gpio_pad_select_gpio(i);
        if (i < 34) {
            gpio_set_direction(i, GPIO_MODE_INPUT);
            gpio_set_pull_mode(i, GPIO_PULLUP_ONLY);
        }
    }

    struct timeval now;
    gettimeofday(&now, NULL);
...
...
Last edited by loboris on Sat Dec 23, 2017 11:41 am, edited 3 times in total.

WiFive
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Joined: Tue Dec 01, 2015 7:35 am

Re: ESP32 WROVER pSRAM Quiescent current

Postby WiFive » Sat Dec 23, 2017 6:48 am

loboris wrote:

Code: Select all

    for (int i=32; i<40; i++) {
        gpio_pad_select_gpio(i);
        gpio_set_direction(i, ***GPIO_PULLUP_ONLY***);
        if (i < 34) gpio_set_pull_mode(i, GPIO_PULLUP_ONLY);
    }
Hmm

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loboris
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Re: ESP32 WROVER pSRAM Quiescent current

Postby loboris » Sat Dec 23, 2017 10:24 am

WiFive wrote: Hmm
Just leftovers from testing, I'm aware it is "Hmm" code...
Last edited by loboris on Sat Dec 23, 2017 11:35 am, edited 1 time in total.

WiFive
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Re: ESP32 WROVER pSRAM Quiescent current

Postby WiFive » Sat Dec 23, 2017 11:15 am

loboris wrote: Just leftovers from testing, I'm aware it is "Hmm" code...
Now that you shared it at least fix the starred argument

ginodecock
Posts: 30
Joined: Thu Jun 29, 2017 7:10 pm

Re: ESP32 WROVER pSRAM Quiescent current

Postby ginodecock » Sun Dec 24, 2017 2:11 pm

This seems to do the trick. :D

These GPIO pins are not used in the schematic of the ESP32 Wrover.

Is the underlying cause the difference between hardware version REV0 en REV1 of the ESP32 chip? :?:

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