Search found 7 matches

by glitch911
Thu Sep 23, 2021 9:01 am
Forum: ESP-IDF
Topic: Inrush current at wifi start for RX only ? Disable RF calibration ?
Replies: 4
Views: 5904

Re: Inrush current at wifi start for RX only ? Disable RF calibration ?

Hello, Thank you 6l3nhx. Nice workaround ! Works perfectly. I made it with timer and disabling the image validation this ack takes 10µWh instead of 20µWh for RF calibration but max current is 50mA instead of 350mA ^^ Battery powered device under -20°C thank you :) void app_main(void) { ++bootCount; ...
by glitch911
Wed Sep 22, 2021 5:11 pm
Forum: ESP-IDF
Topic: [ESP32-C3] RF calibration after wakeup from deep sleep
Replies: 0
Views: 1812

[ESP32-C3] RF calibration after wakeup from deep sleep

Hello, From documentation ( https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/api-guides/RF_calibration.html?highlight=calibration ) RF calibration is not supposed to occur after wake-up from deep sleep as long as phy calibration data is available in NVS. I use same code with former ESP3...
by glitch911
Tue Apr 02, 2019 10:09 am
Forum: ESP-IDF
Topic: Inrush current at wifi start for RX only ? Disable RF calibration ?
Replies: 4
Views: 5904

Inrush current at wifi start for RX only ? Disable RF calibration ?

Hello all, I'm using esp32 only for wifi scan (no connection) and I'd like to minimise the inrush current at start-up. I've used 1ohm shunt to measure current at first start-up and found that depending on the antenna situation the RF calibration takes different time : about 15ms when touched with fi...
by glitch911
Wed Jan 09, 2019 4:21 pm
Forum: General Discussion
Topic: ESP-WROOM-32 Footprint
Replies: 2
Views: 9463

Re: ESP-WROOM-32 Footprint

Hello,

Any update ?

From my understanding the actual datasheet is not 100% perfect between module dimensions and land pattern.
The land pattern exposed pad center is (x=8 y=10.51 from corner) and the exposed pad center on module is (x=7.5 y=10.3 from corner).
by glitch911
Thu Dec 20, 2018 10:01 am
Forum: ESP IoT Solution
Topic: Power budget for WiFi scan
Replies: 0
Views: 4681

Power budget for WiFi scan

Hello all, I'd like to use ESP32-WROOM-32 module only to scan Wi-Fi (for now). I've seen that the deep-sleep current is about 5uA which sounds OK but what would be of great interest is the amount of energy (in mAh for example) that takes the entire operation : wake-up, scan WiFi, go to sleep. On ano...