SD card problem with DF0781 module
Amira.Youssef 2024-12-18 21:03:31 1679 Views3 Replies I tried operating SD card with Df0781 BLE module using HW125 SD module and ST32 microcontroller in Arduino IDE
I change the mode of operation to SD card mode by sending AT+CM03
I always get MU+04 SD insertion the MU+03 SD removal and Error message ER+5
I use direct connect to slot as below schematic
2024-12-26 17:55:34 
Eman.wagih
I am facing same problem
and I am sure formating SD card with fat32 I tested the module with 32G card and 8G card same response
can you please show me a photo for the correct connection of the SD card to the module?
also what is the module output power?
Eman.wagih 2024-12-23 17:07:09 Waqas.Tech
The issue you're encountering with the DF0781 module and its SD card might relate to several common causes. Here are some possibilities and troubleshooting steps:
1. File System Issue
Problem: The SD card might not be formatted correctly. The DF0781 module usually supports FAT16 or FAT32 file systems.Solution: Reformat the SD card using a computer. Choose FAT32 as the file system for cards up to 32GB. For larger cards, consider partitioning to stay within module compatibility. Waqas.Tech 
