BLUETOOTH 5.4 KC RF, RF EMC 인증
MDBT42V-AT
* Pre-Loaded with Raytac's AT command firmware (Peripheral / Slave role)
* Nordic nRF52832 SoC Solution
* A recommended 3rd-party module by Nordic Semiconductor.
* BT5.4 & BT5.2 & BT5.1 & BT5 Bluetooth Specification Certified.
* Certifications: FCC, IC, CE, Telec (MIC), SRRC, NCC
* 32-bit ARM® Cortex™ M4F CPU
* 512kB Flash Memory / 64kB RAM
* RoHS & Reach Compliant.
* Dimension:6.4 x 8.4 x 1.75 mm
* 20 GPIO
* Chip Antenna
* Interface: UART
* MTU upto 247 bytes
* Worked with MDBT42Q-ATM / MDBT42Q-PATM (Central / Master role)

Bluetooth Serial AT Command Firmware : Certral Role Raytac's AT command module series comes with AT command firmware pre-programmed which helps developers enjoy a Design Saving & Time-To-Market journey.
List of supported commands
Setting of device name
Choose data rate of 1Mbps or 2Mbps on-air
Set TX output power in 5 levels.
Set advertising time
Enable/disable advertising
Set LED pattern indicating advertising or connecting status
7 sets of UART baud rates
Enable/disable UART flow control
Power-down mode for power saving and GPIO wake-up
Support DC-to-DC and LDO power mode
Use internal or external 32.768KHz oscillator
Recover-to-default setting with hardware and software method
System reset of hardware and software
Set serial number and retrieve
Retrieve MAC Address
Retrieve ADC value for battery detection
Support maximum MTU 247bytes / data payload up to maximum 244 bytes
Datasheet
Design Guide
Footprint (compatible for Protel, Eagle, Altium Design)
2D/3D drawing
Reflow/Solder Profile
Spec for external 32.768KHz