Merge pull request #1 from PuceBaboon/master

Added camera modification details from Thingiverse project pages
jomjol · Feb 9, 2020 · cf6f0c8 · cf6f0c8
2 parents fd0d719 + b407376
commit cf6f0c8
Show file tree

Hide file tree

Showing 3 changed files with 14 additions and 0 deletions.
diff --git a/ESP32-CAM_Lens_Modification.md b/ESP32-CAM_Lens_Modification.md
@@ -0,0 +1,11 @@
+
+# ESP32-MOD Lens Focal-Length Modification
+
+In order to use it for reading a meter, the focal-length of the OV2640 camera has to be manipulated, as by default it only results in sharp image for distance bigger than ~40cm, causing the image of the water meter to be too small for automated readout processing.
+
+**ATTENTION:** this modification will void any warranty, as the sealing of the lens objective is broken!
+
+**ATTENTION:** This modification will render the camera unsuitable for general, web-cam type applications unless the focal length is changed back to the original setting.
+
+I removed the fixing glue of the OV2640 lens with a sharp knife ([see Picture](./images/Lens_Fixing_Glue.jpg)). After this I could screw the lens in and out. Rotating it by about a quarter of a turn counterclockwise results in a focus plane of about 10cm. You need to figure out your best setting with a little bit of trial and error for your specific environment.
+
diff --git a/README.md b/README.md
@@ -9,6 +9,9 @@ Software for a water meter measurement to provide an JPG-Image of a watermeter w
 
 #### [Full Change History](Changelog.md)
 
+#### ESP32-CAM - Hardware
+The ESP32-CAM camera requires [a simple modification to it's default focus setting](./ESP32-CAM_Lens_Modification.md) to make it suitable for use close to the meter face.
+
 #### ESP32-CAM - Software
 * [ESP32-CAM_Server-GitHub](ESP32-CAM_Server-GitHub)
 * Flashing onto the board is done using an FTDI-Flasher and the board is addressed as "ESP32-Wrover Module"

diff --git a/images/Lens_Fixing_Glue.jpg b/images/Lens_Fixing_Glue.jpg