Search found 8 matches

by alkorismus
Tue Mar 01, 2022 2:44 am
Forum: General Discussion
Topic: UART high speed question 4MHz
Replies: 7
Views: 6299

Re: UART high speed question 4MHz

Hi, I read this (original) post some days ago, but now I decide to share something about my experience. I am interested with UART communication on the ESP32, and so I did some basic tests, nothing very systematic, and was only able to get stable serial to work at about 460 Kbaud... (Arduino IDE code...
by alkorismus
Sat Feb 26, 2022 7:26 am
Forum: Hardware
Topic: ESP-CAM requirements
Replies: 1
Views: 1378

Re: ESP-CAM requirements

Hi. Some ESP-CAM devices comes without a USB-to-Serial Adapter, some other models may already include such interface. To upload firmware (program the ESP device), the normal way to do is to use the ESP32 serial interface (rx, tx), as such, the vast majority of people does use an USB-to-Serial (like ...
by alkorismus
Mon Feb 21, 2022 8:27 am
Forum: Hardware
Topic: WIFI speed, signal interference...
Replies: 1
Views: 2640

Re: WIFI speed, signal interference...

Just want to show another preliminary data. This time, instead of HTTP, just using TCP socket. And, instead of JPEG frame from ov2640, just random 10 kilo bytes... First M5Stack: rand-10k-tcpsocket-m5stack.jpg Below is DevKitC: rand-10k-tcpsocket-devkitc.jpg M5Stack UnitCam - Pure TCP Socket Array R...
by alkorismus
Sat Feb 19, 2022 5:20 am
Forum: Hardware
Topic: WIFI speed, signal interference...
Replies: 1
Views: 2640

WIFI speed, signal interference...

Full title: Question about WIFI data transfer speed variation, possible RF interference... I am testing capture frames with ESP-CAM device and transfer data using WIFI to a Rasp4. The results shown below are from 2 instances of 1000 frames in total. 2 first graphs below represent measurement taken ...
by alkorismus
Sat Feb 12, 2022 1:55 am
Forum: Hardware
Topic: ESP-CAM: crop JPEG image on (ESP) device
Replies: 0
Views: 1354

ESP-CAM: crop JPEG image on (ESP) device

The block below shows what I like to have with ESP-CAM device. =============================================================== Inside ESP32 Device ------------------- JPEG JPEG ------------ | | ------------ | fb>buf | => | crop | | 400 x 296 | | 400 x 225 | | | ------------ ------------ ... then, tr...
by alkorismus
Sun Jan 16, 2022 1:56 am
Forum: Hardware
Topic: ESP32-S2-DEVKITC-1R does have PSRAM?
Replies: 2
Views: 3917

Re: ESP32-S2-DEVKITC-1R does have PSRAM?

Hi. According to the following Mouser webpages, the Dual Core S3 DevKit WITH PSRAM are expected to 2022/JAN/26 : 2MB PSRAM https://eu.mouser.com/ProductDetail/Espressif-Systems/ESP32-S3-DevKitC-1-N8R2?qs=sGAEpiMZZMv0NwlthflBiz4nJ5gFXs406Ki6rRu2iYk%3D 8MB PSRAM https://eu.mouser.com/ProductDetail/Esp...
by alkorismus
Sat Jan 15, 2022 6:24 am
Forum: Hardware
Topic: ESP32-S2-DEVKITC-1R does have PSRAM?
Replies: 2
Views: 3917

Re: ESP32-S2-DEVKITC-1R does have PSRAM?

Hi, found a Mouser webpage saying that " YES, THIS KIT IS NEW AND THIS KIT HAVE 2MB PSRAM "... https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32-S2-DevKitC-1R?qs=pBJMDPsKWf2z8pTLscmMOw%3D%3D unfortunately, the URL to the PDF Documentation that it shows in the page goes to the ESP32-S3-DEV...
by alkorismus
Thu Jan 13, 2022 7:10 am
Forum: Hardware
Topic: ESP32-S2-DEVKITC-1R does have PSRAM?
Replies: 2
Views: 3917

ESP32-S2-DEVKITC-1R does have PSRAM?

Hi, just want to ask if the DevKit: ESP32-S2-DEVKITC-1R includes PSRAM? Digikey product ID: 1965-ESP32-S2-DEVKITC-1R-ND https://www.digikey.com/en/products/detail/espressif-systems/ESP32-S2-DEVKITC-1R/15222539?s=N4IgTCBcDaIIwE4BsBWAtAUQMoAUDMYaWhAIhgGoDSAkgCoDCacASmgHIkgC6AvkA Espressif documentatio...