DM50A and DM50B Offline Voice Recognition Module

Trigger a microcontroller action by speaking a command you recorded yourself. The DM50A and DM50B modules are for electronics makers using a compatible UART host.

• ✅ Run commands offline — The module compares spoken input locally.
• ✅ Teach it your own phrases — Record a set of commands for the project.
• ✅ Read the match in code — UART returns the recognised command ID and score.
• ✅ Choose the kit you need — A DM50B option includes a TTL tool.

Add recorded commands to a project

Record commands in a quiet environment and connect a suitable microphone. Check the pinout for your chosen module before wiring.

DM50A and DM50B use different pin positions. The module supply voltage and UART logic level are separate requirements.

Technical details

• Models: DM50A and DM50B
• Supply: 3.6–5.0 V DC
• UART logic: 3.3 V TTL
• Command storage: 50
• Input: one microphone channel
• Options: DM50A, DM50B or DM50B with TTL tool

Choose the module and interface option for your offline voice-control project.

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