Search found 95 matches

by HermannSW
Fri Jul 12, 2019 9:08 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

To get an idea of why the camera behaves as it does, decoding the I2C traffic between ESP32 and ov2640 sensor would be beneficial. I did start my work on enabling high framerate video capturing (from 90fps/120fps for v1/v2 Raspberry camera to 750fps/1007fps) with doing exactly that. I did solder big...
by HermannSW
Fri Jul 12, 2019 4:18 pm
Forum: ESP32 Arduino
Topic: Measuring power consumption
Replies: 5
Views: 2024

Re: Measuring power consumption

That is an interesting battery, exactly delivering the absolute maximal rating input voltage to the ESP32:
https://www.espressif.com/sites/default ... df#page=40

I had to use step-down converter for 3.7V lipos (they show typically even 4.2V when fully loaded).
by HermannSW
Fri Jul 12, 2019 4:05 pm
Forum: ESP32 Arduino
Topic: ESP32Cam and Servo Control
Replies: 13
Views: 4827

Re: ESP32Cam and Servo Control

You need a separate power source for the servos: https://forum.arduino.cc/index.php?topic=468902.msg3211401#msg3211401 Don't try to power servos or motors from the 5V output of an Arduino. You will damage the Arduino if you do so. Use a separate power supply for the servos, and connect the grounds t...
by HermannSW
Thu Jul 11, 2019 1:28 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

Wow, it took some tries, but I was able to get several global external shutter captures after I completely removed the cardboard box covering the scene👍 So it is not darkness that determines rolling vs. global shutter capturing ... (in this frame you can see the ESP32-CAM module builtin flash light ...
by HermannSW
Thu Jul 11, 2019 12:40 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

My working hypothesis was that global reset of all sensor lines needed for global external shutter frame captures was somehow triggered by a very dark image. So I just opened the cardboard box providing the darkness more and more, until it was open 10cm high on one side: https://stamm-wilbrandt.de/e...
by HermannSW
Thu Jul 11, 2019 11:06 am
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

I was made aware that FREX pin is NOT brought out to the 24pin connector. I looked into what I measured, and found a ov2640 datasheet with connector pins described in figure 1: https://www.mpja.com/download/ov2640data%20sheet.pdf The first pin I measured at beginning of the thread was Y7, and that w...
by HermannSW
Wed Jul 10, 2019 3:50 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

I thought that now I do not need the soldered cable to pin10 of connector anymore. But I did use it now once, I connected logic analyzer to ESP32-CAM GND and the cable soldered to pin10. The idea was to see whether pin B2(FREX) gets changed while doing successful global external shutter captures. I ...
by HermannSW
Tue Jul 09, 2019 7:26 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 11306

Re: ESP32-CAM ov2640 exposure control/FREX mode

Today the two newly ordered ESP32-CAM modules arrived. Both had Wifi issues, although I did not change location. Adding external Wif antenna fixed the issue: https://stamm-wilbrandt.de/en/forum/IMG_090719_193926.jpg Both modules work like the module I did solder a cable to pin10 of connector. It was...
by HermannSW
Tue Jul 09, 2019 5:44 pm
Forum: ESP32 Arduino
Topic: ESP32Cam and Servo Control
Replies: 13
Views: 4827

Re: ESP32Cam and Servo Control

> RC wasnt slow / inaccurate > I just tested a newly arrived ESP32-CAM module, and the FCameraWebServer reported framerates were much less than with my current working ESP32-CAM module. It turned out to be Wifi problems, since after I added an external Wifi antenna to the new ESP32-CAM module framer...
by HermannSW
Tue Jul 09, 2019 1:51 pm
Forum: ESP32 Arduino
Topic: ESP32Cam and Servo Control
Replies: 13
Views: 4827

Re: ESP32Cam and Servo Control

If the HTML RC wasnt slow / inaccurate i would fly copters with it. That is a good point, I will have to build in a heartbeat signal between intex.html(browser) and app_httpd.cpp(ESP32) and let the ESP32 do "full stop" automatically when no heartbeat received, at least for the 5m/s caterpillar robo...

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