RAYTAC MDBT42Q - AT User manual

Version: I
Issued Date: 2021/07/07
Approval Sheet
(產品承認書)
產品名稱
(Product)
BLE AT Command Module
in Peripheral / Slave role
解決方案
(Solution)
Nordic nRF52810 QFN Package
產品型號
(Model No.)
MDBT42Q –AT (Chip Antenna)
MDBT42Q –PAT (PCB Antenna)
韌體版本
(FW Rev.)
1.4
Advantage of MDBT42Q & MDBT42Q-P series:
1. Long working distance under 1 Mbps:
MDBT42Q: over 80 meters in open space.
MDBT42Q-P: up to 60 meters in open space.
2. Declaration ID includes all Nordic applied profiles.
3. Granted main regional certification such as FCC (USA), CE(EU)
TELEC (Japan), SRRC (China), IC (Canada), NCC (Taiwan), and KC (South Korea)

Index
1. Overall Introduction ...................................................................................................... 4
2. AT Command ................................................................................................................. 4
2.1. List of supported commands................................................................................. 4
2.2. AT Command Sets................................................................................................ 5
2.2.1. “Write” Commands................................................................................................ 5
2.2.2. “Read” Commands ............................................................................................... 8
2.2.3. Response (Default)............................................................................................... 9
2.3. Default Info ..........................................................................................................11
2.4. Pin Assignment................................................................................................... 12
3. How to Control via External MCU .............................................................................. 14
3.1. How to Send AT Commands............................................................................... 14
3.2. How to Transmit Data ......................................................................................... 16
3.3. How to Return to Setting of Default Flash........................................................... 16
4. Test Report................................................................................................................... 17
4.1. Current Test ........................................................................................................ 17
4.2. Throughput Test.................................................................................................. 18
5. Product Dimension ..................................................................................................... 20
5.1. PCB Dimensions & Pin Indication....................................................................... 20
5.2. Recommended Layout of Solder Pad................................................................. 22
5.3. RF Layout Suggestion (aka Keep-Out Area) ...................................................... 26
5.4. Footprint & Design Guide ................................................................................... 28
6. Main Chip Solution...................................................................................................... 29
7. Shipment Packaging Information .............................................................................. 30
7.1. Marking on Metal Shield ..................................................................................... 31
7.2. Packaging Info.................................................................................................... 31
7.3. Order Code......................................................................................................... 33
8. Specification ................................................................................................................ 34
8.1. Absolute Maximum Ratings ................................................................................ 34
8.2. Operation Conditions.......................................................................................... 34
8.3. Electrical Specifications...................................................................................... 35
9. Antenna........................................................................................................................ 40

9.1. MDBT42Q Series ............................................................................................... 40
9.2. MDBT42Q-P Series............................................................................................ 41
10. Reference Circuit......................................................................................................... 42
11. Certification ................................................................................................................. 43
11.1. Declaration ID..................................................................................................... 43
11.2. FCC Certificate (USA) ........................................................................................ 44
11.3. TELEC Certificate (Japan).................................................................................. 46
11.4. NCC Certificate (Taiwan) .................................................................................... 48
11.5. CE Test Report (EU) ........................................................................................... 50
11.6. IC Certificate (Canada)....................................................................................... 52
11.7. SRRC Certificate (China).................................................................................... 54
11.8. KC Certificate (South Korea) .............................................................................. 55
11.9. RoHS & REACH Report ..................................................................................... 56
11.10. End-Product Label.............................................................................................. 56
12. Notes and Cautions..................................................................................................... 59
13. Basic Facts for nRF52 Chip........................................................................................ 60
14. Useful Links ................................................................................................................. 61
History of Firmware Revision............................................................................................ 62
Full List of Raytac’s BLE Modules .................................................................................... 64
Release Note....................................................................................................................... 67

4
1.Overall Introduction
Raytac’s MDBT42Q-AT & MDBT42Q-PAT is a BT 5.2 stack (Bluetooth low energy or BLE)
module designed based on Nordic nRF52810 SoC solution, which incorporates: UART
interface in only peripheral/slave role for data bridge in compact size (L) 16 x (W) 10 x (H)
2.2 mm.
2.AT Command
2.1. List of supported commands
- Setting of device name
-Choose data rate of 1 Mbps or 2 Mbps on-air
-Set TX output power in 5 levels.
-Set advertising time
-Set connection interval under Mode 2
-Enable/disable advertising
-Set LED pattern indicating advertising or connecting status
-7 sets of UART baud rates
-Enable/disable UART flow control
-Enable/disable interface of UART hardware
-Support 8 programmable output GPIO
-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
-Set or retrieve MAC Address
-Retrieve ADC value for battery detection, delivering the information through battery
service.
-Support maximum MTU 247bytes / data payload up to maximum 244 bytes

5
2.2. AT Command Sets
2.2.1.“Write”Commands
No.
Command
Description
(1)
AT+NAME
Set 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+ADVSTART
Set to start advertising
(4)
AT+ADVSTOP
Set to stop advertising
(5)
AT+SLEEP
Set to get into deep sleep mode
(6)
AT+BAUDRATE9600
Set UART baud rate at 9600 bps,n,8,1
(7)
AT+BAUDRATE19200
Set UART baud rate at 19200 bps,n,8,1
(8)
AT+BAUDRATE38400
Set UART baud rate at 38400 bps,n,8,1
(9)
AT+BAUDRATE57600
Set UART baud rate at 57600 bps,n,8,1
(10)
AT+BAUDRATE115200
Set UART baud rate at 115200 bps,n,8,1
(11)
AT+BAUDRATE230400
Set UART baud rate at 230400 bps,n,8,1
(recommended enabling flow control)
(12)
AT+BAUDRATE460800
Set UART baud rate at 460800 bps,n,8,1
(recommended enabling flow control)
(13)
AT+FLOWCONTROLDIS
Disable UART flow control
(14)
AT+FLOWCONTROLEN
Enable UART flow control
(15)
AT+TXPOWER4DBM
Set RF TX power at + 4dBm
(16)
AT+TXPOWER0DBM
Set RF TX power at 0dBm
(17)
AT+TXPOWER-4DBM
Set RF TX power at - 4dBm
(18)
AT+TXPOWER-8DBM
Set RF TX power at - 8dBm
(19)
AT+TXPOWER-20DBM
Set RF TX power to - 20dBm
(20)
AT+XTALINTERNAL
Use internal RC 32.768KHZ low frequency oscillator
(21)
AT+XTALEXTERNAL
Use external crystal 32.768KHZ low frequency oscillator
(22)
AT+CONNECTINDICATORLOW
Set logic low output when connecting BT
(23)
AT+CONNECTINDICATORHIGH
Set logic high output when connecting BT
(24)
AT+PHYMODE1MBPS
Set PHY mode at 1Mbps

6
No.
Command
Description
(25)
AT+PHYMODE2MBPS
Set PHY mode at 2Mbps
(26)
AT+WAKEUPLOW
Set logic low at wake-up when in deep sleep
(27)
AT+WAKEUPHIGH
Set logic high at wake-up when in deep sleep
(28)
AT+ADVTIMEtttt
Set advertising time (Hex)
e.g. 0x001E (min. 30secs),
0x0E10 (Max. 3,600secs)
0x0000 (forever)
(29)
AT+DCDCDIS
Disable DC to DC converter
(30)
AT+DCDCEN
Enable DC to DC converter
(31)
AT+CONNECTINTERVALMODE0
Set connection interval mode for iOS/Android APP usage
(min. 20ms / Max. 40ms),
(32)
AT+CONNECTINTERVALMODE1
Set connection interval mode for nRF52832 Central usage
(min. 8ms / Max. 8ms)
(33)
AT+CONNECTINTERVALMODE2
Set connection interval mode for iOS/Android APP usage
(programmable: min. / Max. range is 8ms ~ 1,000ms)
(34)
AT+CONNECTINTERVALTIMEtttttttt
Set connection interval time (Hex), available when
activating “AT+CONNECTINTERVALMODE2”
e.g. 0x0008 (8ms),
0x03E8 (1,000ms), conditions to be met:
“min. connection interval ≦ Max. connection interval”
(35)
AT+ADVPATTERNnnnnffff
Set LED advertising pattern (Hex), where
n = time when LED on, f = time when LED off
e.g. 0x0064 (min. 100ms)
0x1388 (Max. 5000ms),
0x00000000 (off)
0xFFFFFFFF (on)
(36)
AT+CONNECTPATTERNnnnnffff
Set LED connecting pattern (Hex), where
n = time when LED on, f = time when LED off
e.g. 0x0064 (min. 100ms)
0x1388 (Max. 5000ms)
0x00000000 (off)
0xFFFFFFFF (on)

7
No.
Command
Description
(37)
AT+SERIALNOnnnnnnnn
Set serial number
e.g. AB000001, fixed 8-character length
(38)
AT+RESPONSEDIS
Disable response when sending “write” command
(39)
AT+RESPONSEEN
Enable response when sending “write” command
(40)
AT+DISCONNECT
Terminate the connection
(41)
AT+DEFAULT
Back to default
(42)
AT+SETGPIOnnHIGH
Set GPIO number p0.nn to high,
where “nn” is range from 12 ~ 19 (Ascii)
(43)
AT+SETGPIOnnLOW
Set GPIO number p0.nn to low,
where “nn” is range from 12 ~ 19 (Ascii)
(44)
AT+SETGPIOnnOFF
Set GPIO number p0.nn to unused,
where “nn” is range from 12 ~ 19 (Ascii)
(45)
AT+MACADDRnnnnnnnnnnnn
Set IC MAC address, where n is Hex.
Written order is from MSB byte to LSB byte.

8
2.2.2.“Read”Commands
No.
Command
Description
(1)
AT?NAME
To retrieve device name
(2)
AT?VERSION
To retrieve firmware version
(3)
AT?MACADDR
To retrieve IC MAC address
(4)
AT?BAUDRATE
To retrieve current UART baud rate
(5)
AT?FLOWCONTROL
To retrieve UART status of flow control
(6)
AT?TXPOWER
To retrieve RF TX power
(7)
AT?XTAL
To retrieve status of oscillator
(8)
AT?CONNECTINDICATOR
To retrieve logic of pin for BT-connecting indicator
(9)
AT?PHYMODE
To retrieve status of PHY mode
(10)
AT?WAKEUP
To retrieve logic of wake-up pin
(11)
AT?ADVTIME
To retrieve advertising time (Hex)
(12)
AT?DCDC
To retrieve DC to DC converter status
(13)
AT?CONNECTINTERVALMODE
To retrieve status of connection interval mode
(14)
AT?ADVPATTERN
To retrieve LED advertising pattern (Hex)
(15)
AT?CONNECTPATTERN
To retrieve LED connecting pattern (Hex)
(16)
AT?SERIALNO
To retrieve serial number
(17)
AT?ADCVALUE
To retrieve 10bit ADC value
(18)
AT?RESPONSE
To retrieve status of response
(19)
AT?ALLPARAMETERS
To retrieve value of all parameters
(20)
AT?CONNECTINTERVALTIME
To retrieve value of connection interval time under Mode 2

9
2.2.3.Response (Default)
No.
Command
Response
(1)
AT?NAME
Raytac AT-UART (default)
(2)
AT?VERSION
e.g. version: 1.0
(3)
AT?MACADDR
e.g. D352BDE1E414
(4)
AT?BAUDRATE
0 baudrate9600 (default)
(0 = 9600; 1 = 19200; 2 = 38400; 3 = 57600; 4 = 115200;
5 = 230400; 6 = 460800)
(5)
AT?FLOWCONTROL
0 flowcontrol dis (default)
(0 = disabled; 1 = enabled)
(6)
AT?TXPOWER
0 txpower 4dbm (default)
(0 = 4dBm; 1 = 0dBm; 2 = -4dBm; 3 = -8dBm, 4 = -20dBm)
(7)
AT?XTAL
0 xtal internal (default)
(0 = internal; 1 = external, and XTAL = 32.768KHz
oscillator)
(8)
AT?CONNECTINDICATOR
0 connect indicator low (default)
(0 = output low; 1 = output high)
(9)
AT?PHYMODE
0 PHY mode 1Mbps (default)
(0 = 1Mbps; 1 = 2Mbps)
(10)
AT?WAKEUP
0 wakeup low (default)
(0 = low active; 1 = high active)
(11)
AT?ADVTIME
0000 (default: Hex, forever advertising with no timeout,
tttt: 0x0000)
(12)
AT?DCDC
0 dcdc dis (default)
(0 = disabled; 1 = enabled)
(13)
AT?CONNECTINTERVALMODE
0 connect interval mode 0 (default)
(0 = fixed connection interval for iOS/Android APP usage
1 = fixed connection interval,for nRF52832 Central usage
2 = programmable connection interval for iOS/Android APP
usage)
(14)
AT?ADVPATTERN
01F401F4 (default: Hex, 0.5sec on / 0.5sec off,
nnnn: 0x01F4, ffff: 0x01F4)

10
No.
Command
Response
(15)
AT?CONNECTPATTERN
00c80708 (default: Hex, 0.2sec on / 1.8sec off,
nnnn: 0x00c8, ffff: 0x0708)
(16)
AT?SERIALNO
Display “ no data! ” string (default)
(17)
AT?ADCVALUE
Value varies from input voltage
(18)
AT?RESPONSE
1 response en (default)
(0 = disable response; 1 = enable response)
(19)
AT?ALLPARAMETERS
Display value of all parameters, separated by "0x0d0x0a"
(20)
AT?CONNECTINTERVALTIME
006400C8 (default: Hex, 100ms min. connection interval /
200ms Max. connection interval, tttttttt: 0x006400C8)