![]() SD_MMC.h – The SD card library for ESP32.In your code, you’ll use two libraries to work with the MicroSD card: If you have a larger card it will work, providing it is formatted with FAT32, but it will only store 4GB of data. The ESP32-CAM is only capable of working with 4GB of MicroSD storage. Internally, the card interface is wired to the ESP32 SPI bus. The connection is made using the contacts on the card. The MicroSD card contains a non-volatile serial RAM memory chip that is connected to its host using the SPI bus. We have covered Arduino programming for SD and MicroSD cards before, and the principles are identical for the MicroSD card on the ESP32-CAM board. The stand-alone adapters don’t need jumpering or the Reset button, so they are easier to program with. You’ll also need to press the Reset button after the program compiles so that the upload can begin. Make sure to note the point about the jumper wire from the ground to GPIO0, which needs to be in place if you want to program the board. If you choose the latter, I have completed instructions for hooking it up in the article on Getting Started with the ESP32-CAM, which you should probably read anyway. You can buy an adapter to do the job, or you can use a stand-alone FTDI board. I’m sure that you have already noticed that your ESP32-CAM does not have a MicroUSB or USB-C connector, so you’ll require an FTDI adapter to convert your USB signals to TTL-level signals for the ESP32. You will need to have your IDE configured to use the ESP32, if you are using the Arduino IDE please see my article about Getting Started with the ESP32 for more details regarding adding the ESP32 Boards Manager code. If you’re more comfortable in an alternate environment like PlatformIO, then by all means feel free to use it instead. We’ll be using the Arduino IDE for our programming tasks, I’ll be using the classic (Version 1.8x) IDE, but you could also use the newer Arduino IDE Version 2.0. I used 16GB cards in the experiments I performed, and they worked well. In fact, if you can find 4GB cards that would be ideal, but they are pretty rare these days. We’ve used it with some of our Raspberry Pi experiments before.īut consider this – you’ll only be able to use 4GB of the card with the ESP32, so using a large MicroSD card is really just a waste of space. There is a utility from Verbatim that can be used to format MicroSD cards with FAT32, regardless of size. If you have a MicroSD card that is 32GB or larger, however, then it’s more of a challenge. Then just format it, a Quick Format will be fine. Go to the Format menu and make sure that FAT32 is selected, which it likely will be by default. Just plug the MicroSD card in and Windows will detect it and offer to format it. If you have Windows and a card that is smaller than 32GB then you’re all set, assuming your computer has an adapter for MicroSD or TF cards. And it’s much easier if your MicroSD card is smaller than 32 GB. Specifically, formatting is a lot easier with Microsoft Windows than it is with any other operating system. Not exFAT, which is likely how it was formatted at the factory, but FAT32.įormatting a MicroSD card in FAT32 may or may not be easy, depending upon the size of the card and what kind of computer you have access to. Specifically, it needs to be formatted in FAT32. MicroSD Card Preparationīefore we can write anything to a MicroSD card, it needs to be formatted. Once we are clear on all of that, we can start using the MicroSD card in our ESP32-CAM projects. How to write that file to a MicroSD card.How to get images from the camera and turn them into a JPEG file.In order to save images onto the ESP32-CAM MicroSD card, we need to know a few things: We’ll also build a motion-sensitive camera and a time-lapse camera. ![]() Today, I’ll show you how easy it is to use the MicroSD card in the ESP32-CAM board to do exactly that – store images captured by the camera. This is a shame, as it’s an obvious place to store images captured by the camera. We tend to overlook the MicroSD card for all the other amazing capabilities of the ESP32-CAM board, especially as the CameraWebServer example doesn’t use a MicroSD. The only thing better than getting a 2 MP camera along with a 32-bit microcontroller with integrated WiFi and Bluetooth for about 10 bucks is that it also comes with a great example sketch that essentially turns it into a surveillance camera with face-detection capabilities.Ī pretty incredible board, and it also has a MicroSD card. The ESP32-CAM is certainly a perfect example of just how much electronics you can pack onto a tiny circuit board for an incredibly low price. ![]()
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