Ebyte E840-DTU User Manual
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Ebyte E840-DTU User Manual

Wireless data transceiver e840-dtu (gprs-01)
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This manual may be modified based on product upgrade, please refer to the latest version.
All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.
E840-DTU（GPRS-01）
User Manual
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  • Page 1 E840-DTU（GPRS-01） User Manual This manual may be modified based on product upgrade, please refer to the latest version. All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 2 Initial version huaa E840-DTU (GPRS-01) is designed for the communication between UART and net server via GPRS. With easy AT setting, the dual transparent transmission can be conducted. This chapter focuses on the brief introduction of E840-DTU (GPRS-01). It explains how to make the simplest hardware environment and test the transparent transmission of E840-DTU (GPRS-01).

  • Page 3: Table Of Contents

    Content Introduction ..................................5 1.1 Brief Introduction ....................................5 1.2 Parameters ......................................5 1.3 Interface Description ..................................... 6 1.4 Pin Definition ......................................7 Test Introduction ................................7 2.1 Devices Preparation ....................................7 2.2 Data Transmitting Test ..................................8 2.2.1 Test Procedures ..........................................8 AT Parameter Setting ..............................
  • Page 4 7.1 Notes for Powering on ..................................20 7.2 Internet Connection ..................................... 21 7.2.1 Wi-Fi Connection ........................................21 7.2.2 Connection Failure ........................................21 7.2.3 Easy Disconnection ........................................21 7.3 Description of Connection failure ..............................21 Important Statement ..............................22 About Us ..................................22...

  • Page 5: Introduction

    1. Introduction 1.1 Brief Introduction E840-DTU (GPRS-01) is a wireless data transceiver of Ebyte. It features a certain scope of applications which cover most common application scenarios. It supports definable ConnReg and keepalive. E840-DTU (GPRS-01) supports DC and RS485 terminal power supply. Its voltage ranges from 8.0 to 28.0V. 5.0V works too. RS232 and RS485 apply electric isolation which enables anti-interference.

  • Page 6: Interface Description

    1.3 Interface Description...

  • Page 7: Pin Definition

    Power adaptor interface SIM card slot 2. Test Introduction 2.1 Devices Preparation E840-DTU（GPRS-01） 12V power adaptor GPRS sucker antenna USB to RS485 adaptor or USB to RS232 adaptor Please get UART, SIM card, sucker antenna and etc. ready according to the recommended circuit before test.

  • Page 8: Data Transmitting Test

    2.2.1 Test Procedures Insert the SIM card into E840-DTU (GPRS-01) and connect it to the computer according to the mentioned methods. Open the Xcom, set the parameters of corresponding UART NO. and baud rate and turn on the UART. (China Telecom SIM card is not compatible.) When powered on with the power adaptor provided by us, POWER indicator on and NET indicator blinking shows that the transceiver is ready.
  • Page 9 Parameter Configuration Transparent transmission with net testing tool...

  • Page 10: At Parameter Setting

    AT Parameter Setting 3.1 Parameter Setting Preparation This transceiver features auto connection once powered on. It will output “CONNECT OK” if the transceiver is connected successfully and the transparent transmission mode is on. Users need to input +++ (\n) to switch to the configuration mode and to input ATO to switch back to the transmission mode.

  • Page 11: At+Dtuid: Transceiver Configuration Id

    Return: OK Checkout: AT+DSCADDR? Return: +DSCADDR: 0,"TCP" IP/Domain: "218.242.43.254" Port: 18 +DSCADDR: 1,"TCP" IP/Domain: "218.242.43.254" Port: 18 Config: AT+DSCADDR=0,"TCP","www.cdebyte.com",80 Return: OK Config: AT+DSCADDR=1,"UDP","www.cdebyte.com",80 Return: OK Checkout: AT+DSCADDR? Return： +DSCADDR: 0,"UDP" IP/Domain: " www.cdebyte.com " Port: 80 +DSCADDR: 1, "UDP" IP/Domain: " www.cdebyte.com " Port: 80 Sever parameter(default)：...

  • Page 12: At+Acktime: Responding Time Configuration

    Configuration: AT+KEEPALIVE=0,0, cdebyte 3.2.5 AT+ACKTIME: Responding Time Configuration AT+ACKTIME=N Responding configuration: The value range of N is 0-65535. not available when set as 0. When time’s up, and the transceiver doesn’t receive the data packet, the internet is off, under reconnection or restart. The measurement is second, and the maximum of it is 65535.

  • Page 13: At+Dtufilter Filter Configuration

    +DEBUGMODE: (0,1) 0：Debug mode on. Available to print the parameter. 1: Debug mode off. Not available to print the parameter. For example: AT+DEBUGMODE=? +DEBUGMODE: (0,1) AT+DEBUGMODE? +DEBUGMODE: 1 AT+DEBUGMODE=0 Configuration: AT+DEBUGMODE=1 3.2.1.0 AT+DTUFILTER Filter Configuration AT+DTUFILTER=? Return： +DTUFILTER: (0,1) 0: Filter off, available to show call-ins and requests 1: Filter on, not available to show call-ins and requests For example：...

  • Page 14: At+Dsctime Server Connection Timeout

    AT+RELINKTIME? +RELINKTIME: 20 AT+RELINKTIME=30 Configuration: AT+RELINKTIME=5 3.2.13 AT+DSCTIME Server Connection Timeout Note: This timeout includes: When transceiver and GPRS are on, the transceiver will restart if the connection to the server is not successful over 120S(default). When connection is off, the transceiver will restart if the connection to the server is not successful over 120S(default). AT+DSCTIME=? +DSCTIME: (40-600) parameter: 40S-600S...

  • Page 15: Dtu:0000:Cgmr? Software Version

    4.1.1 @DTU:0000:CGMR? Software Version For example: Send checkout request to transceiver: @DTU:0000:CGMR? Return when checkout is done: @DTU:0000:CGMR? +CGMR: B3524_B5_R02_A06_D151224 Return when checkout is failed: @DTU:1234:CGMR? (Input wrong password to test) ERROR 4.1.2 @DTU:0000:PASSWORD:aaaa configuration Request Password Send configuration request @DTU:0000:PASSWORD: aaaa. Switch password from 0000 to aaaa. Password(default): 0000.

  • Page 16: Dtu:0000:Keepalive:10,5,3000,5,0,Kingcom

    2 HEX format (2-60，HEX format ID digit is even.) ID configuration: transceiver ID digit For example: Send configuration request: @DTU:0000:DTUID:1,0,31654646494777 Return when configuration is done: @DTU:0000:DTUID:1,0,31654646494777 Return when configuration is failed: @DTU:1234:DTUID:1,0,31654646494777 (Input wrong password to test) ERROR Send checkout request: @DTU:0000:DTUID? Return when checkout is done: @DTU:0000:DTUID? +DTUID: 1,0,31654646494777 Return when checkout is failed: @DTU:1234:DTUID? (Input wrong password to test) ERROR Parameter and explanation reference: AT+DTUID 4.1.5 @DTU:0000:KEEPALIVE:10,5,3000,5,0,kingcom...

  • Page 17: Dtu:0000:Poweroff Transceiver Restart

    Return when checkout is failed: @DTU:1234:UARTCFG? (Input wrong password to test) ERROR Parameter and explanation reference: AT+UARTCFG 4.1.7 @DTU:0000:POWEROFF Transceiver Restart Send checkout request: @DTU:0000:DEBUGMODE? Return when checkout is done: @DTU:0000:DEBUGMODE? +DEBUGMODE:0 Return when checkout is failed: @DTU:1234:DEBUGMODE? (Input wrong password to test) ERROR Parameter and explanation reference: AT+DEBUGMODE 4.1.8 @DTU:0000:DEBUGMODE:0 Debug Mode...

  • Page 18: Dtu:0000:Relinktime:60 Relink Interval Configuration

    4.1.10 @DTU:0000:RELINKTIME:60 Relink Interval Configuration Send configuration request @DTU:0000:RELINKTIME:60 Reconnection time: 60S Send checkout request @DTU:0000:RELINKTIME? For example： Send configuration request: @DTU:0000:RELINKTIME:60 Return when configuration is done: @DTU:0000:RELINKTIME:60 Return when configuration is failed: @DTU:1234:RELINKTIME:60 (Input wrong password to test) ERROR Send checkout request: @DTU:0000:RELINKTIME? Return when checkout is done: @DTU:0000:RELINKTIME? +RELINKTIME:60 Return when checkout is failed: @DTU:1234:RELINKTIME? (Input wrong password to test)

  • Page 19: Dtu:mmcz Password Reset Configuration

    4.1.13 @DTU:MMCZ Password Reset Configuration Send request @DTU:MMCZ request of switching the password into the default one 4.1.14 @DTU:0000:DTUALL? Get Parameters Send request @DTU: 0000:DTUALL? Request of obtaining all the parameters Notes: This command is only applicable in sever configuration. SMS is not applicable because the data length is beyond that of one SMS. For example: Send checkout request: @DTU: 0000:DTUALL? Return when checkout is done: +DSCADDR: 0,"TCP"...

  • Page 20: Dtu:0000:At&F Reset

    4.1.18 @DTU:0000:AT&F Reset Send request @DTU:0000:AT&F Request of reseting For example: Send request: @DTU:0000:AT&F Return when checkout is done: @DTU:0000:AT&F Send request: @DTU:1234:AT&F Return when checkout is failed: @DTU:1234:AT&F(Input wrong password to test) ERROR 5. SMS SMS available Message in SMS will be sent but not saved. In order to set the report from the transceiver in SMS, users can input +++(No enter) to enter command mode.

  • Page 21: Internet Connection

    7.2 Internet Connection 7.2.1 Wi-Fi Connection To check if the transceiver is on. The NET light is blinking when transceiver is on. To check if the SIM card is read properly. Send: AT+CPIN? to transceiver. Return: +CPIN:READY, SIM card is read properly Return: +CME ERROR:10, SIM card is not read properly（It is advisable to check the SIM card slot, change another card and the circuit.）...

  • Page 22: Important Statement

    3）Other problems caused by internet 4）DNS failure 5） The current TCP/UDP is not IP INITIAL, IP STATUS, IP CLOSE (Check out with command: AT+CIPSTATUS). It is connected for more than once. Bad internet environment. Return: COMMAND NO RESPONSE! 8. Important Statement 1. CDEBYTE reserves the right of final interpretation and modification of all the contents of this manual.

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