RAYTAC MDBT50Q-DB-ATMS User manual

Version: A
Issued Date: 2020/05/30
User Guide
(簡易使用手冊)
產品名稱 (Product): Demo Board
for MDBT50Q-ATMS / MDBT50Q-PATMS
產品型號 (Model No.): MDBT50Q –DB –ATMS
韌體版本 (FW Revision): 1.0
DEFAULT ROLE IS “PERIPHERAL / SLAVE”

Index
1. Introduction ................................................................................................................... 3
1.1. Contents of the Set............................................................................................... 3
2. Hardware Description ................................................................................................... 4
3. Reference Circuit........................................................................................................... 6
4. AT Command ................................................................................................................. 7
4.1. List of supported commands................................................................................. 7
4.1.1. Central.................................................................................................................. 7
4.1.2. Peripheral............................................................................................................. 8
4.2. AT Command Sets................................................................................................ 9
4.2.1. “Central” Commands ............................................................................................ 9
Central “Write” ...................................................................................................... 9
Central “Read” .................................................................................................... 14
4.2.2. “Peripheral” Commands...................................................................................... 16
Peripheral “Write”................................................................................................ 16
Peripheral “Read” ............................................................................................... 19
4.2.3. Response (Default)............................................................................................. 20
Central................................................................................................................ 20
Peripheral........................................................................................................... 23
4.3. Default Info......................................................................................................... 25
4.3.1. Central................................................................................................................ 25
4.3.2. Peripheral........................................................................................................... 27
5. How to Control External MCU .................................................................................... 28
5.1. How to Send AT Commands............................................................................... 28
5.1.1. UART Mode........................................................................................................ 28
5.1.2. USB Mode.......................................................................................................... 29
5.2. How to Return to Flashed Default Setting........................................................... 30
5.3. Default Definition of Connect/ADV LED Status................................................... 31
5.4. How to Start Scanning........................................................................................ 32
5.5. Throughput Test.................................................................................................. 35
6. Useful Links................................................................................................................. 46
History of Firmware Revision............................................................................................ 47
Release Note....................................................................................................................... 48

1.Introduction
This document shows how to use the demo board (MDBT50Q-DB-ATMS) to test function of
MDBT50Q-ATMS & MDBT50Q-PATMS.
MDBT50Q-DB-ATMS is designed for testing and debugging without building your own board.
The board is only available with MDBT50Q-ATMS (chip antenna) module. MDBT50Q-ATMS
will be pre-programmed with Raytac’s AT command firmware. If you don’t need such
pre-programming and is looking for nRF52833 module, please check MDBT50Q-512KV2 and
MDBT50Q-P512KV2.
Please visit our website for spec sheet of every module mentioned above.
1.1. Contents of the Set
Each set includes MDBT50Q-DB-ATMS x 1 and mini-USB cable x 1.

2.Hardware Description
(1) MDBT50Q-ATMS BLE module based on nRF52833.
(2) 32.768KHz crystal for external LF oscillator .
(3) External MCU control Interface
(4) ADC input for battery detection only. Reference voltage is 0.6V.
Example:
formula: Input Voltage 
  
   
       
(5) UART interface for data bridge or AT commands.

(6) Wake-up(Scan) key.
(7) 3.3V LDO to power up MDBT50Q-ATMS.
(8) LED for status indicator
(9) USB interface for USB Mode
(10) Select USB Mode

3.Reference Circuit

4.AT Command
4.1. List of supported commands
4.1.1.Central
- Hardware selecting of UART or USB interface
- Enable/disable interface of UART hardware for saving power
- Setting of device role as Central or Peripheral
- Setting of scanned device name
- Setting of scanned base UUID / service UUID / TX character / RX character
- Setting of scanned RSSI threshold
- Select data rate of 1 Mbps, 2 Mbps or 125 Kbps on-air
- Select output power in 6 levels.
- Select connection interval mode
- Select UART baud rates / auto baud rates under USB mode
- Select LDO or DC-to-DC power mode
- Select external or internal RC 32.768KHz oscillator
- System reset of software or hardware
- Recover-to-default setting with hardware and software method
- Set scanning/ idle time
- Start or stop scanning
- Set LED pattern indicating scanning, idle or connecting status
- Enable/disable UART flow control
- Power-down mode for power saving and GPIO wake-up
- Support DLE / maximum MTU 247 bytes / data payload up to maximum 244 bytes
- Print out scan list including RSSI, MAC address and device name
- Support direct connection to the device with specific MAC address
- Scan beacon company ID/UUID (support extended advertising beacon)
- Enable/Disable beacon information printed out through USB/UART interface
(support extended advertising beacon)

4.1.2.Peripheral
- Hardware selecting of UART or USB interface
- Enable/disable interface of UART hardware for saving power
- Setting of device role as Central or Peripheral
- Setting of advertising device name
- Setting of base UUID / service UUID / TX character / RX character
- Select data rate of 1 Mbps, 2 Mbps or 125 Kbps on-air
- Select output power in 6 levels.
- Select connection interval mode
- Select UART baud rates / USB mode auto baud rates
- Select LDO or DC-to-DC power mode
- Select external or internal RC 32.768KHz oscillator
- System reset of software or hardware
- Recover-to-default setting with hardware and software method
- Set advertising time
- Setting of advertising interval
- Start or stop advertising
- Set LED pattern indicating advertising or connecting status
- Enable/disable UART flow control
- Power-down mode for power saving and GPIO wake-up
- Set serial number and retrieve
- Set or retrieve MAC Address
- Retrieve ADC value for battery detection, delivering the information through battery
service
- Support DLE / maximum MTU 247 bytes / data payload up to maximum 244 bytes

4.2. AT Command Sets
4.2.1.“Central”Commands
⚫Central “Write”
No.
Command
Description
(1)
AT+CENTRAL
Set device role as Central
(2)
AT+PERIPHERAL
Set device role as Peripheral
(3)
AT+NAME
Set device name, Max. length of 20 characters
e.g. AT+NAME123 (device name 123, 3 characters)
(4)
AT+BASEUUID
uuuuuuuuuuuuuuuu
uuuuuuuuuuuuuuuu
Set base UUID for NUS (Hex),
e.g. 9ECADC240EE5A9E093F3A3B50000406E
13th & 14th byte is reserved for service / TX character
RX character UUID, always be 0000.
(5)
AT+SERVICEUUIDuuuu
Set service UUID for NUS (Hex),
e.g. 0x0001
(6)
AT+TXCHARACTERUUIDuuuu
Set TX character UUID for NUS (Hex),
e.g. 0x0003
(7)
AT+RXCHARACTERUUIDuuuu
Set RX character UUID for NUS (Hex),
e.g. 0x0002
(8)
AT+RSSITHRESHOLDnnn
Set RSSI threshold for scanning all devices (Ascii),
e.g. -90 (min.); -20 (Max.)
(9)
AT+PHYMODE1MBPS
Set PHY mode at 1Mbps
(10)
AT+PHYMODE2MBPS
Set PHY mode at 2Mbps
(11)
AT+PHYMODE125KBPS
Set PHY mode at 125Kbps
(12)
AT+TXPOWER8DBM
Set RF TX power at + 8dBm
(13)
AT+TXPOWER4DBM
Set RF TX power at + 4dBm
(14)
AT+TXPOWER0DBM
Set RF TX power at 0dBm
(15)
AT+TXPOWER-4DBM
Set RF TX power at - 4dBm
(16)
AT+TXPOWER-8DBM
Set RF TX power to - 8dBm
(17)
AT+TXPOWER-20DBM
Set RF TX power at - 20dBm

No.
Command
Description
(18)
AT+CONNECTINTERVALMODE0
Set connection interval mode for Peripheral 20ms/40ms
usage (min. 20ms / Max. 40ms),
(19)
AT+CONNECTINTERVALMODE1
Set connection interval mode for Peripheral 8ms/8ms
usage (min. 8ms / Max. 8ms)
(20)
AT+CONNECTINTERVALMODE2
Set connection interval mode for Peripheral usage
(programmable: min. / Max. range is 8 ms ~ 1,000 ms)
(21)
AT+CONNECTINTERVALTIMEnnnnffff
Set the range of connection interval for Mode 2,
e.g. nnnn= min. time / 0x0008 (Min. 8ms)
f f f f = Max. time / 0x03E8 (Max. 1,000ms)
“min. time ≤ connection interval ≤ Max. time
(22)
AT+BAUDRATE9600
Set UART baud rate at 9600 bps,n,8,1
(23)
AT+BAUDRATE19200
Set UART baud rate at 19200 bps,n,8,1
(24)
AT+BAUDRATE38400
Set UART baud rate at 38400 bps,n,8,1
(25)
AT+BAUDRATE57600
Set UART baud rate at 57600 bps,n,8,1
(26)
AT+BAUDRATE115200
Set UART baud rate at 115200 bps,n,8,1
(27)
AT+BAUDRATE230400
Set UART baud rate at 230400 bps,n,8,1
(28)
AT+BAUDRATE460800
Set UART baud rate at 460800 bps,n,8,1
(29)
AT+BAUDRATE921600
Set UART baud rate at 921600 bps,n,8,1
(30)
AT+DCDCDIS
Disable DC to DC converter (LDO mode)
(31)
AT+DCDCEN
Enable DC to DC converter (DC-to-DC mode)
(32)
AT+XTALINTERNAL
Use internal RC 32.768 KHZ oscillator
(33)
AT+XTALEXTERNAL
Use external crystal 32.768 KHZ oscillator
(34)
AT+RESET
Set to reset system
(35)
AT+SCANOLDTIMEtttt
Set time of scanning of paired device (Hex)
e.g. 0x001E (min. 30secs),
0x0258 (Max. 600secs)
0x0000 (forever)
(36)
AT+SCANNEWTIMEtttt
Set time of scanning ALL devices (Hex)
e.g. 0x001E (min. 30secs),
0x0258 (Max. 600secs)
0x0000 (forever)