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The createDir() function creates a new directory. Pass as an argument the SD filesystem and the directory name path. void createDir(fs::FS &fs, const char * path){ Maybe there are differences between the versions of Arduino IDE because I don’t get to see: Examples > SD(esp32) > SD_Test You may even opt for an All-In-One Card Reader which looks identical to a USB Hub. Along with the similar working, it’s much more cost-effective. Media Dashboard
Thank you so much for your work and the time you have spent making this ESP32 application(s) available for everyone. Besides adding USB ports to your PC, some high-end Hubs also offer microSD and SD card slots. You need to first insert a memory chip here and then connect the device to your PC using its USB Type-A or Type-C cable. This example uses the functions we’ve seen previously to write and append data to the microSD card ( writeFile() and appendFile() functions).Copy the following code to your Arduino IDE. This sketch gets BME280 sensor readings (temperature, humidity, and pressure) and logs them in a file on the microSD card every 30 seconds. It also logs the timestamp (epoch time requested to an NTP server). /*
Unfortunately, not all SD card adapters are waterproof. They are not meant to be exposed to water, and if that happens to be the case your adapter might get damaged or destroyed. Can an SD lose its data overtime? Firstly, you need to identify the SD card family you’re using — standard, mini, or micro. Each of them differs in terms of size and is categorized into four types based on memory capacity — SDSC, SDHC, SDXC, and SDUC. The listDir() function lists the directories on the SD card. This function accepts as arguments the filesystem ( SD), the main directory’s name, and the levels to go into the directory. void listDir(fs::FS &fs, const char * dirname, uint8_t levels){You can rename a file using the renameFile() function. Pass as arguments the SD filesystem, the original filename, and the new filename. void renameFile(fs::FS &fs, const char * path1, const char * path2){ You can find plenty of useful gadgets online that allow you to access data from the SD card. They are cost-effective and portable. All you have to do is insert the memory chip into the device and then connect it to the computer. SD Card Reader USB-C SD Card Reader Up until just recently I have been beginning to despair of the ESP32 as I have been unable to write to it because of some error messages in the Arduino IDE. I tried using different versions of the board andvthe IDE but to no avail. It wasn’t until I read a comment on a similar post that I had any success. The comment said that this chap had the same issue on his Windows10 machine, but on his laptop he had no problem. So, lightbulb moment, I got out my old Sony Vaio running Windows 7 and, behold, the problem no longer happened. Reply Whether your PC casing has pre-built SD card slots or you installed a Media Dashboard, you can now directly insert the memory chip. Here’s the correct way to do just that:
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