Search found 7 matches

by dynek=
Tue Jun 06, 2023 6:12 am
Forum: ESP-IDF
Topic: internet unavailable when connected to AP(Wi-Fi) of ESP32 DevKit,
Replies: 18
Views: 22807

Re: internet unavailable when connected to AP(Wi-Fi) of ESP32 DevKit,

Hey, Has anyone every succeeded in having both mobile/cellular internet connectivity + ESP32 in AP mode (without Internet) on Android devices? Looks like the following make it so I can at least access the ESP32, but mobile connectivity is not working anymore: uint8_t opt_val = 0; // don't supply a d...
by dynek=
Tue Mar 29, 2022 5:10 am
Forum: Hardware
Topic: Noise when interacting with i2c
Replies: 6
Views: 4211

Re: Noise when interacting with i2c

You are right, one of the ground cable was guilty for this, replaced it and it's ok now 👍👍

Thank you
by dynek=
Mon Mar 28, 2022 6:29 am
Forum: Hardware
Topic: Noise when interacting with i2c
Replies: 6
Views: 4211

Re: Noise when interacting with i2c

It's A 2N3907 being driven high-side: https://www.eevblog.com/forum/beginners ... e-voltage/
by dynek=
Sun Mar 27, 2022 9:36 pm
Forum: Hardware
Topic: Noise when interacting with i2c
Replies: 6
Views: 4211

Re: Noise when interacting with i2c

No one noticed this before? :|
by dynek=
Fri Mar 25, 2022 1:55 pm
Forum: Hardware
Topic: Noise when interacting with i2c
Replies: 6
Views: 4211

Noise when interacting with i2c

Hello everyone, I know this is super light, but before digging too much into it, I wanted to check if there's something obvious and known about ESP32 and i2c. Got a GPIO (17) on an ESP32 wroom that is set to PWM 50% duty and here's what I see with the scope: SDS00034.png Now when there's an interact...
by dynek=
Mon Mar 14, 2022 10:01 am
Forum: General Discussion
Topic: esp32 interrupt firing occasionally on it's own
Replies: 6
Views: 8499

Re: esp32 interrupt firing occasionally on it's own

Just had that very same issue, trying to investigate with a scope but either it's really random or as soon as I plug the scope it doesn't happen anymore :lol:

Edit: there we go!
SDS00022.png
SDS00022.png (14.85 KiB) Viewed 4914 times
SDS00023.png
SDS00023.png (15.84 KiB) Viewed 4914 times
by dynek=
Thu Aug 27, 2020 11:34 am
Forum: Hardware
Topic: How to measure a battery.
Replies: 3
Views: 6682

Re: How to measure a battery.

Jenya, To stabilize voltage, you may also want to add a capacitor and a resistor "just in case of": https://github.com/esp8266/Arduino/issues/2070#issuecomment-222891420 I've done so yesterday evening to mesure a backup battery for my home automation device (to ensure it doesn't go below 12V, otherw...