Search found 6 matches

by noblerabbit
Mon Feb 25, 2019 3:52 pm
Forum: Hardware
Topic: LDO and I2C sensor powered directly from the GPIO
Replies: 2
Views: 1295

Re: LDO and I2C sensor powered directly from the GPIO

@ESP_Sprite. Appreciate your feedback. Thank you.
by noblerabbit
Sat Feb 16, 2019 5:32 pm
Forum: Hardware
Topic: LDO and I2C sensor powered directly from the GPIO
Replies: 2
Views: 1295

LDO and I2C sensor powered directly from the GPIO

Hi, My I2C sensor operates at 2.8 V, therefore I need to add the LDO to get from 3.3 V down to 2.8 V. And the I2C sensor requires max 2 mA for operation. GPIO from esp32 can supply up to 40 mA. I would like to avoid having LDO powered when I don't need the sensor in order to minimize the current. Th...
by noblerabbit
Fri Jan 04, 2019 5:23 pm
Forum: ESP-IDF
Topic: WiFi current optimization in soft AP
Replies: 0
Views: 761

WiFi current optimization in soft AP

Hi, What are the options to optimize the current due to WiFi? Is there a possibility to decrease the current due to the wifi radio while running soft AP? (It increases the current by 80mA). I only need the soft AP to work on a very short distance and send 2kB every 10 seconds. I read about the modem...
by noblerabbit
Wed Dec 26, 2018 4:56 pm
Forum: Hardware
Topic: esp-wroom-32 deep sleep current
Replies: 4
Views: 2714

Re: esp-wroom-32 deep sleep current

Hi,
Thanks for the fast reply. I stand corrected (I had accelerometer connected). esp-wroom-32 deepsleep current stands as 4.6 uA. I am using KeySight 34461A. Power supply 3.3V + pin > 34461A > 3v3 input on PCB with wroom.
Thanks.
by noblerabbit
Sun Dec 23, 2018 8:18 pm
Forum: Hardware
Topic: esp-wroom-32 deep sleep current
Replies: 4
Views: 2714

esp-wroom-32 deep sleep current

Hi, I made a breakout board and right now it only contains esp-wroom-32 with TX, RX connectors (i have SIL 2102 on separate pcb for us communication) so i can communicate with it. If I put esp-wroom-32 in deep sleep the current is 470 uA. Whatever is driving the current must be inside the wroom. I'v...
by noblerabbit
Tue Oct 23, 2018 9:52 am
Forum: General Discussion
Topic: ESP32 and CR2032 battery
Replies: 15
Views: 21336

Re: ESP32 and CR2032 battery

Hi,

If I only use BLE on esp32, is it possible to run it on CR2032? I assume WiFi is the biggest reason for current spikes?

Thanks.

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