# Command Set - [Application Group 0x00 - Device Information Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x00-device-information-messages.md) - [Application Group 0x01 - General Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x01-general-messages.md) - [Application Group 0x02 - Authentication Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x02-authentication-messages.md) - [Application Group 0x03 - Device Configuration Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x03-device-configuration-messages.md) - [Application Group 0x04 - Magnetic Stripe Reader (MSR) Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x04-magnetic-stripe-reader-msr-messages.md) - [Application Group 0x05 - PAN Messages](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x05-pan-messages.md) - [Application Group 0x07 - EMV L2 Contact Messages (Chip Card L2 Mode Only) - 1 - 15](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x07-emv-l2-contact-messages-chip-card-l2-mode-only-1-15.md) - [Application Group 0x07 - EMV L2 Contact Messages (Chip Card L2 Mode Only) - 16 - 30](https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set/application-group-0x07-emv-l2-contact-messages-chip-card-l2-mode-only-16-30.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://developer.magtek.com/hardware/oem-readers-and-components/oem-readers/odynamo/documentation/programmers-manuals/programmers-manual-commands/command-set.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.