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I am working on a clickBoard with MC60 A GSM module from MikroEletronika company.

This clickBoard has two slots: (1) one for SIM card and another (2) for micro SD cards. I have read all the available documentation: AT commands user guide manual (Quectel documentation) and some code examples (Libstock) and i still cannot find any information about how can I communicate with SD card slot.

The only thing I've found about this topic was on quectel hardware guide:

The following are the main features of SD card interface: - Only supports 1bit serial mode; Not support the SPI mode for SD memory card - No support multiple SD memory cards - No support hot plug; The data rate up to 48MHz in serial mode - Support for memory cards with maximum capacity up to 32GB;

From this I assume it is a serial communication. So, with the info I know, the two questions I have are:

  1. Can I write/read bytes with the usage of AT commands? If yes, which AT commands?

  2. It is necessary any specific format for micro SD card (FAT, exFAT, FAT32 or NFTS)?

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  • \$\begingroup\$ You will most likely have to pursue this directly with the manufacturer. \$\endgroup\$ – Chris Stratton Nov 12 '18 at 18:33
  • \$\begingroup\$ I already did it. I am just waiting for an answer. Soon as i know how to solve the problem, I'll post here. \$\endgroup\$ – Ricardo Goncalves Nov 13 '18 at 10:29
  • \$\begingroup\$ SD Cards have nothing to do with AT-Commands. \$\endgroup\$ – A.R.C. Nov 19 '18 at 11:00
  • \$\begingroup\$ Do some research before comment. If you know what a MC60 is, and if you read my question, you will notice that MC60 has a SD slot card which can be accessed by AT Commands. \$\endgroup\$ – Ricardo Goncalves Nov 20 '18 at 12:14
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I sent an e-mail to quectel manufacturer and they sent me a specific document for FILE AT commands. Here. For some reason, neither MikroEletronica or quectel have this file available on MC60 datasheets.

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