Search found 90 matches

by HermannSW
Tue Jun 25, 2019 4:18 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

Last night I did more experiments, and accidentally broke the soldered cable to pin10 connection. It took some more tries to get the cable soldered to this tiny pin again. Unfortunately that solding partly broke my ESP32-CAM board. Flashing CameraWebServer.ino works fine, webserver boots up and serv...
by HermannSW
Mon Jun 24, 2019 11:26 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

Trying to solder something to the uncovered wire was a flop. I read that the size of soldering iron point should be not larger than the size of object to solder to. Despite that I only have 1mm Ø soldering iron and I am not good at soldering, I tried to solder cable to pin10 of flat ribbon connector...
by HermannSW
Mon Jun 24, 2019 10:07 am
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

Hmmm, not sure whether it is possible to solder a thin cable to line on the flat ribbon cable. At least there is an area with more space that 0.5mm spacing on the connector, and it is on the up side: https://stamm-wilbrandt.de/en/forum/ov2640.pins.6.part.jpg Raspberry Pi microscope allows to get muc...
by HermannSW
Sun Jun 23, 2019 6:41 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

> Next step: > Determine ESP32-CAM GPIO pin the right connector pin 10 is connected to (if any). > Did that, flashed MicroPython onto ESP32-CAM module, connected one contact of voltmeter with GND, and pressed the other onto B2 pin, then executed these commands in "sudo screen /dev/ttyUSB0 115200" se...
by HermannSW
Sun Jun 23, 2019 9:33 am
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

I was not sure whether A2 and B2 were exposed to connector pins, could be, could be not. I started to verify G5, G6, E5 and G4 by looking up where the pin should be based on black see-through photo, and then measuring near 0Ω on ohmmeter. It turned out not to be difficult to just select one of the 2...
by HermannSW
Sun Jun 23, 2019 12:08 am
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

In order to verify visually determined sensor pin to connector pin connections it is necessary to use ohmmeter. The connector pins are so small that it is really difficult to hit them. Luckily I had a spare 24-line cable mount. I fixated that to desk with a one-hnded clamp. Then I brought Raspberry ...
by HermannSW
Sat Jun 22, 2019 7:26 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

This are the 16 pins from previous P.S marked in datasheet diagram: https://stamm-wilbrandt.de/en/forum/ov2640.pins.work.jpg I did remove a metallic plate on the other side of the connector. Grey glue parts remained. Again I did an IR light see-through image, this time with 48-led IR light directly ...
by HermannSW
Sat Jun 22, 2019 6:05 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

Re: ESP32-CAM ov2640 exposure control/FREX mode

Unlike ov5647 sensor that allows to enter FREX mode either via I2C command (which I did for my global external shutter work) or via pin signalling, ov2640 sensor only allows to enter FREX mode via pin signalling. The interesting pins for entering FREX mode are A2 (EXPST_B) and B2 (FREX), from ov2640...
by HermannSW
Sat Jun 22, 2019 12:41 am
Forum: ESP32 Arduino
Topic: Can I use a OV7670 camera with the Arduino CameraWebServer example for ESP32 Wrover?
Replies: 3
Views: 2017

Re: Can I use a OV7670 camera with the Arduino CameraWebServer example for ESP32 Wrover?

CameraWebServer.ino does not support ov7670 as the error message you get states. Only ov2640 (2MP) and ov3660 (2MP) are supported (only for those webpages are defined in "~/.arduino15/packages/esp32/hardware/esp32/1.0.2/libraries/ESP32/examples/Camera/CameraWebServer/camera_index.h"). P.S: Better ex...
by HermannSW
Fri Jun 21, 2019 12:54 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 33
Views: 8558

ESP32-CAM ov2640 exposure control/FREX mode

I recently built a global external shutter for (ov5647 sensor) Raspberry v1 camera: https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter Since ov2640 sensor is a predecessor of ov5647 and has FREX mode as well (that enables starting accumulation of all sensor lines at the same t...

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