Search found 43 matches

by alanesq
Wed Jan 13, 2021 8:15 am
Forum: General Discussion
Topic: How to detect objects in range of 30 cm (180/360 angle)
Replies: 5
Views: 435

Re: How to detect objects in range of 30 cm (180/360 angle)

Could you have a platform in front or around the water bowl which acts like a pressure mat and pushes a micro-switch when the cat stands on it? Infra red beam which triggers when broken? Ultrasonic distance sensor? i.e. HC-SR04 (I don't know if cats can hear them?) BTW - There is a similar thread he...
by alanesq
Wed Dec 30, 2020 2:22 pm
Forum: Hardware
Topic: Using 4x4 Keypad GPIO 15 and 2
Replies: 3
Views: 240

Re: Using 4x4 Keypad GPIO 15 and 2

by alanesq
Wed Dec 30, 2020 10:51 am
Forum: ESP-IDF
Topic: ESP32-CAM (OV2640) encode image to base64
Replies: 1
Views: 148

Re: ESP32-CAM (OV2640) encode image to base64

Hi, I am not sure if this will be of much help to you as I use the Arduino_IDE, but the basics may be the same? In this sketch I capture an image and then convert it to basic RGB data - https://github.com/alanesq/esp32cam-demo BTW - You may run in to problems at the highest resolutions as there may ...
by alanesq
Sat Dec 19, 2020 6:03 am
Forum: Hardware
Topic: ESP32Cam motherboard
Replies: 6
Views: 478

Re: ESP32Cam motherboard

If they don't provide any schematic you'll have to reverse engineer it, follow the traces on the pcb. Can you take some high res photos of this other GND pin you're curious about, both sides of the board, and see what it connects to? If they're both labeled GND but not connected that sounds bad to ...
by alanesq
Sat Dec 19, 2020 3:56 am
Forum: Hardware
Topic: ESP32Cam motherboard
Replies: 6
Views: 478

Re: ESP32Cam motherboard

Please post pictures / link to the 'motherboard' in question ? This is the only info. I have managed to find about it, which is very little http://www.hpcba.com/en/latest/source/DevelopmentBoard/HK-ESP32-CAM-MB.html This is a typical listing on ebay https://www.ebay.co.uk/itm/ESP32-CAM-WIFI-Bluetoo...
by alanesq
Fri Dec 18, 2020 5:10 pm
Forum: Hardware
Topic: ESP32Cam motherboard
Replies: 6
Views: 478

ESP32Cam motherboard

I have just bought a motherboard from eBay for use with the esp32cam to see what they are (search eBay for esp32cam-mb). It seems to work well as long as I set the upload speed to the slower options (e.g. 115200) but the reset pin is very interesting, it works by linking together the gnd pin next to...
by alanesq
Mon Dec 14, 2020 7:50 am
Forum: ESP32 Arduino
Topic: ESP32-cam with ds1302?
Replies: 8
Views: 9586

Re: ESP32-cam with ds1302?

If you use the sd card in 1-bit mode this frees up pins 4, 12 and 13 SD card access will be slower as it is only using one of the 4 data pins. i.e. in Arduino IDE the command is: SD_MMC.begin("/sdcard", true) You need to define them is input or output after initialising the sd card I have then been ...
by alanesq
Mon Dec 07, 2020 10:02 am
Forum: Hardware
Topic: GPIO Pinouts
Replies: 6
Views: 537

Re: GPIO Pinouts

by alanesq
Thu Dec 03, 2020 4:26 pm
Forum: General Discussion
Topic: Which is best method for programming the ESP32?
Replies: 3
Views: 429

Re: Which is best method for programming the ESP32?

I have one which would not work at all until I changed the "flash frequency" from 80 to 40 in the Arduino IDE, I can't remember now what the symptoms were - I have a feeling it claimed to upload but nothing happened? btw - this may be of help? https://randomnerdtutorials.com/esp32-troubleshooting-gu...
by alanesq
Wed Dec 02, 2020 5:57 pm
Forum: General Discussion
Topic: Which is best method for programming the ESP32?
Replies: 3
Views: 429

Re: Which is best method for programming the ESP32?

There is no problem programming the esp32 with the Arduino IDE, there are some good instructions on how to set it up here: https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/ I personally prefer to use the Arduino IDE as it means I can easily switch betwee...

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