RAYTAC MDBT42Q-AT-UART-M User manual

Version: C
Issued Date: 2020/04/22
User Guide
(簡易使用手冊)
產品名稱 (Product): Demo Board for MDBT42Q-ATM / PATM
產品型號 (Model No.): MDBT42Q –AT –UART –M
韌體版本 (FW Revision): 1.2

Index
1. Introduction ................................................................................................................... 3
1.1. Contents of the Set............................................................................................... 3
2. Hardware Description ................................................................................................... 4
3. Reference Circuit........................................................................................................... 6
4. Connecting for the First Time ...................................................................................... 7
5. AT Command ................................................................................................................. 8
5.1. List of supported commands................................................................................. 8
5.2. AT Command Sets................................................................................................ 9
5.3. Default Info......................................................................................................... 17
6. How to Control External MCU .................................................................................... 19
6.1. How to Send AT Commands............................................................................... 19
6.2. How to Return to Flashed Default Setting........................................................... 20
6.3. How to Start Scanning........................................................................................ 22
7. Report of Data Transmission...................................................................................... 25
8. Useful Links................................................................................................................. 27
History of Firmware Revision............................................................................................ 28
Release Note....................................................................................................................... 29

1.Introduction
This document shows how to use the demo board (MDBT42Q-AT-UART-M) to test function of
MDBT42Q-ATM & MDBT42Q-PATM.
MDBT42Q-AT-UART-M is designed for testing and debugging without building your own
board. The board is only available with MDBT42Q-ATM (chip antenna) module.
MDBT42Q-ATM will be pre-programmed with Raytac’s AT command firmware. If you don’t
need such pre-programming and is looking for nRF52832 module, please check
MDBT42Q-512KV2 and MDBT42Q-P512KV2.
Please visit our website for spec sheet of every module mentioned above.
1.1. Contents of the Set
Each set includes MDBT42Q-AT-UART-M x 1 and mini-USB cable x 1. Please contact us if
the set you receive is not complete.

2.Hardware Description
(1) MDBT42Q-ATM BLE module based on nRF52832.
(2) 32.768KHz crystal for external LF.
(3) 10uH & 15nH inductor for DC-to-DC mode.
(4) Interface to connect to external MCU.
(5) ADC input for battery detection only. Reference voltage is 0.6V.
Example:
formula: Input Voltage 
  
   
       
(6) UART interface for data bridge or AT commands.
(7) Pairing key.

(8) Debug interface, connecting to Nordic’s nRF5X DK.
Important: Please be careful not to “erase” the module during testing. Raytac’s
AT command firmware will not be shared. You may need to send the unit to us
for re-programming when module’s FW is erased.
(9) 3.3V LDO to power up MDBT42Q-ATM.
(10) LED for status indicator
(11) USB Power only

3.Reference Circuit

4.Connecting for the First Time
Please follow instruction below to connect MDBT42Q-AT-UART-Sto MDBT42Q-AT-UART-M.
1. Make sure the distance between 2 boards is less than 30 cm.
2. Press the “pairing key” on MDBT42Q-AT-UART-Mfor over 2 seconds.
3. When seeing LED blinks like below, the connection is successful.
Connected
0.2 sec ON / 1.8 secs OFF
Note that a few criteria must be met in order to pair successfully, see 6.3 How to Start
Scanning. Try default setting if pairing was not successful.

5.AT Command
5.1. List of supported commands
- Setting of scanned device name
- Setting of scanned base UUID/service UUID/TX character/RX character
- Setting of scanned RSSI threshold
- Choose data rate of 1M bps or 2M bps on-air
- Set TX output power in 5 levels.
- Set scanning time
- Enable/disable scanning
- Set LED pattern indicating scanning 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
- Enable/Disable Beacon information printed out through UART interface
(31 bytes beacon)
- Support scan Beacon company ID/UUID (31 bytes beacon)

5.2. AT Command Sets
5.2.1.“Write”Commands
No.
Command
Description
(1)
AT+NAME
Set scanned device name. Max. length of 20 characters
e.g. AT+NAME123 (device name 123, 3 characters)
(2)
AT+RESET
Set to reset system
(3)
AT+SCANOLDSTART
Set to start scanning paired device
(4)
AT+SCANNEWSTART
Set to start scanning ALL devices
(5)
AT+SCANSTOP
Set to stop scanning
(6)
AT+SLEEP
Set to get into deep sleep mode
(7)
AT+BAUDRATE9600
Set UART baud rate at 9600 bps,n,8,1
(8)
AT+BAUDRATE19200
Set UART baud rate at 19200 bps,n,8,1
(9)
AT+BAUDRATE38400
Set UART baud rate at 38400 bps,n,8,1
(10)
AT+BAUDRATE57600
Set UART baud rate at 57600 bps,n,8,1
(11)
AT+BAUDRATE115200
Set UART baud rate at 115200 bps,n,8,1
(12)
AT+BAUDRATE230400
Set UART baud rate at 230400 bps,n,8,1
(recommended enabling flow control)
(13)
AT+BAUDRATE460800
Set UART baud rate at 460800 bps,n,8,1
(recommended enabling flow control)
(14)
AT+FLOWCONTROLDIS
Disable UART flow control
(15)
AT+FLOWCONTROLEN
Enable UART flow control
(16)
AT+TXPOWER4DBM
Set RF TX power at + 4dBm
(17)
AT+TXPOWER0DBM
Set RF TX power at 0dBm
(18)
AT+TXPOWER-4DBM
Set RF TX power at - 4dBm
(19)
AT+TXPOWER-8DBM
Set RF TX power at - 8dBm
(20)
AT+TXPOWER-20DBM
Set RF TX power to - 20dBm
(21)
AT+XTALINTERNAL
Use internal RC 32.768KHZ low frequency oscillator
(22)
AT+XTALEXTERNAL
Use external crystal 32.768KHZ low frequency oscillator
(23)
AT+CONNECTINDICATORLOW
Set logic low output when connecting BT
(24)
AT+CONNECTINDICATORHIGH
Set logic high output when connecting BT

No.
Command
Description
(25)
AT+PHYMODE1MBPS
Set PHY mode at 1Mbps
(26)
AT+PHYMODE2MBPS
Set PHY mode at 2Mbps
(27)
AT+WAKEUPLOW
Set logic low at wake-up when in deep sleep
(28)
AT+WAKEUPHIGH
Set logic high at wake-up when in deep sleep
(29)
AT+IDLETIMEtttt
Set idle time (Hex)
e.g. 0x001E (min. 30secs),
0x0258 (Max. 600secs)
0x0000 (forever)
(30)
AT+SCANOLDTIMEtttt
Set time of scanning of paired device (Hex)
e.g. 0x001E (min. 30secs),
0x0258 (Max. 600secs)
0x0000 (forever)
(31)
AT+SCANNEWTIMEtttt
Set time of scanning all devices (Hex)
e.g. 0x001E (min. 30secs),
0x0258 (Max. 600secs)
0x0000 (forever)
(32)
AT+DCDCDIS
Disable DC to DC converter
(33)
AT+DCDCEN
Enable DC to DC converter
(34)
AT+CONNECTINTERVALMODE0
Set connection interval mode for Peripheral 20ms/40ms
usage (min. 20ms / Max. 75ms),
(35)
AT+CONNECTINTERVALMODE1
Set connection interval mode for Peripheral 8ms/8ms
usage (min. 8ms / Max. 8ms)
(36)
AT+IDLEPATTERNnnnnffff
Set LED idle pattern (Hex), where
n = time when LED on, f = time when LED off
e.g. 0x0064 (min. 100ms)
0x1388 (Max. 5,000ms)
0x00000000 (off)
0xFFFFFFFF (on)