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RAYTAC MDBT42T-AT-UART-S, User Manual

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RAYTAC MDBT42T-AT-UART-S User Manual Download Page 20

 

 

20 

7. 

Useful Links 

⚫

 

Nordic Infocenter: 

https://infocenter.nordicsemi.com/index.jsp

 

All the necessary technical files and software development kits of Nordic’s chip are on 
this website.

⚫

 

Nordic Developer Zone: 

https://devzone.nordicsemi.com/questions/

 

A highly recommended website for firmware developer. Interact with other developers 
and Nordic’s employees will help with your questions. The site also includes tutorials in 
detail to help you get started.

⚫

 

Official Page of nRF52805 : 

https://www.nordicsemi.com/Products/Low-power-short-

range-wireless/nRF52805

 

A brief introduction to nRF52805 and download links for Nordic’s developing software 
and SoftDevices.

Summary of Contents for MDBT42T-AT-UART-S

Page 1: ...Version B Issued Date 2020 11 27 User Guide Product Demo Board for MDBT42T AT PAT Model No MDBT42T AT UART S FW Revision 1 0...

Page 2: ...rted commands 7 4 2 AT Command Sets 8 4 3 Default Info 14 5 How to Control via External MCU 15 5 1 How to Send AT Commands 15 5 2 How to Transmit Data 16 5 3 How to Return to Flashed Default Setting 1...

Page 3: ...e with MDBT42T AT chip antenna module MDBT42T AT will be pre programmed with Raytac s AT command firmware If you don t need such pre programming and is looking for nRF52805 module please check MDBT42T...

Page 4: ...5 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 Inp...

Page 5: ...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...

Page 6: ...3 Reference Circuit...

Page 7: ...able disable interface of UART hardware 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 w...

Page 8: ...UDRATE230400 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...

Page 9: ...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...

Page 10: ...write command 38 AT DISCONNECT Terminate the connection 39 AT DEFAULT Back to default 40 AT MACADDRnnnnnnnnnnnn Set IC MAC address where n is Hex Written order is from MSB byte to LSB byte Important F...

Page 11: ...eve 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 retr...

Page 12: ...ternal 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 wa...

Page 13: ...from input voltage 16 AT RESPONSE 1 response en default 0 disable response 1 enable response 17 AT ALLPARAMETERS Display value of all parameters separated by 0x0d0x0a 18 AT CONNECTINTERVALTIME 006400C...

Page 14: ...lator Using internal RC with 1000ms calibration time 8 Logic of BT connecting indicator Output set as logic low when BT is connecting 9 PHY mode 1Mbps 10 Logic of wake up pin Set logic low to wake up...

Page 15: ...or and reading is not successful 3 Send command AT RESET not HW reset to save all your settings 4 Output high or NC to UART PD pinto turn off UART interface When BT is connected for following command...

Page 16: ...is NOT connected Note that default baud rate is 9600bps n 8 1 For other default please check 4 3 Default Info Use Hardware Method 1 Read indicator pin first to check if BT is NOT in connection 2 Outp...

Page 17: ...testing is done under PHY mode at 1M bps 6 1 Current Test DC DC Logic of UART PD pin Advertising Current Connected Current Disable High 0 85 mA 0 3 mA Low 1 56 mA 1 mA Enable High 0 45 mA 0 16 mA Low...

Page 18: ...75ms min 20ms Max 40ms 9600 X 64 60 262152 273 0 96 244 250 999432 1 042 V 244 250 999432 1 042 min 20ms Max 75ms min 20ms Max 40ms 115200 X 64 8 262152 33 7 9 244 30 999432 124 8 V 244 30 999432 124...

Page 19: ...273 0 96 244 250 999432 1 042 V 244 250 999432 1 042 min 20ms Max 75ms min 20ms Max 40ms 115200 X 64 8 262152 33 7 9 244 30 999432 124 8 V 244 30 999432 124 8 min 20ms Max 75ms min 20ms Max 40ms 4608...

Page 20: ...emi com questions A highly recommended website for firmware developer Interact with other developers and Nordic s employees will help with your questions The site also includes tutorials in detail to...

Page 21: ...21 History of Firmware Revision FW Ver Compatible HW Build Release Date Description of Revision Note 1 0 2020 09 24 1st release 99 52805 03A...

Page 22: ...22 Release Note 2020 10 16 Version A 1st release 2020 11 27 Version B 1 Refined description in Chapter 5 How to Control via External MCU...

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