Search found 28 matches

by lesept
Thu Jul 23, 2020 8:18 am
Forum: Hardware
Topic: Pick up WiFi noise
Replies: 3
Views: 482

Re: Pick up WiFi noise

Thanks for your answers. You are right, I need to give more details. I want to generate a different random voltage value 80 million times per second. I am currently considering the Zener circuit, but as I saw that the ESP32's true random number generator was based on reading the antenna voltage (or ...
by lesept
Wed Jul 22, 2020 3:14 pm
Forum: Hardware
Topic: Pick up WiFi noise
Replies: 3
Views: 482

Pick up WiFi noise

Hello
In a project I need to create some random white noise at very high frequency (80 MHz). Would it be possible to pick up the noise from the antenna port and amplify it to do this?
If yes, should I connect some wires in parallel to the antenna port of my ESP32 board?

Any idea welcome. Thanks
by lesept
Sun Jul 21, 2019 3:37 pm
Forum: ESP32 Arduino
Topic: ESP32 + OLED + battery reboots constantly
Replies: 0
Views: 657

ESP32 + OLED + battery reboots constantly

Hi I recently purchased on AliExpress a board with an ESP32, an OLED display and a battery support. It is very similar to this one: https://ae01.alicdn.com/kf/HTB1a6.lkaSWBuNjSsrbq6y0mVXaI/For-ESP32-0-96-0-96-inch-OLED-Display-WiFi-Bluetooth-18650-Lithium-Battery-Shield-Development.jpg_640x640.jpg I...
by lesept
Thu May 16, 2019 12:43 pm
Forum: ESP32 Arduino
Topic: Cannot connect to NTP server with fixed IP
Replies: 6
Views: 2527

Re: Cannot connect to NTP server with fixed IP

martinayotte wrote:
Tue May 14, 2019 3:15 pm
As I said, try using 8.8.8.8 as DNS, it should work ...
Changed the order of the parameters in the config. Changed the DNS to 8.8.8.8.
It works now, thanks a lot!
by lesept
Tue May 14, 2019 8:09 am
Forum: ESP32 Arduino
Topic: Cannot connect to NTP server with fixed IP
Replies: 6
Views: 2527

Re: Cannot connect to NTP server with fixed IP

@martinayotte : Actually, I don't know. How can I find this information?
@boarchuz : I'll try to change the order. Thanks
by lesept
Mon May 13, 2019 1:31 pm
Forum: ESP32 Arduino
Topic: Cannot connect to NTP server with fixed IP
Replies: 6
Views: 2527

Cannot connect to NTP server with fixed IP

Hi I usually use the sketch from here https://lastminuteengineers.com/esp32-ntp-server-date-time-tutorial/ to get the time via NTP. But when I use a fixed IP for my ESP32, the connexion to the NTP server doesn't work anymore. Here is the modified sketch: the fixed IP part works in any other conditio...
by lesept
Thu May 02, 2019 7:56 am
Forum: General Discussion
Topic: IP Address of Clients in AP mode
Replies: 5
Views: 3781

Re: IP Address of Clients in AP mode

Is there a way to know the IP address of a client connected to the ESP32 as SoftAP using Arduino IDE ?
by lesept
Sun Apr 28, 2019 7:56 pm
Forum: ESP32 Arduino
Topic: Soft AP limit
Replies: 0
Views: 616

Soft AP limit

Hi
I have read that the number of clients for the ESP32 in soft access point is limited to 5. Is this true? Cn this limit be overriden?
Thanks
by lesept
Tue Feb 05, 2019 1:35 pm
Forum: ESP32 Arduino
Topic: Deep sleep and time accuracy
Replies: 2
Views: 2191

Re: Deep sleep and time accuracy

Thanks
Actually, I spotted an error : i should have substracted the 200 ms of the delay from the sleep time, making it 4800000 us. I'll check that tonight !
by lesept
Mon Feb 04, 2019 10:41 pm
Forum: ESP32 Arduino
Topic: Deep sleep and time accuracy
Replies: 2
Views: 2191

Deep sleep and time accuracy

I want to make a clock displaying the time as HH:MM on an e-paper display. The e-paper takes some time to refresh. To save power, I put the ESP32 in deep sleep until the next plain minute to wake up and display the new time. My problem here is how to estimate accurately the sleep time? For the first...

Go to advanced search