ML8021 GPRS Modem User Manual.docx
Contents
1. 3 Application interface 3 1Pin description 9876 Table 3 Pin description pe AM jej je e E 3 P LB koni dn lid 3 2 Operating modes The table below briefly summarizes the various operating modes referred to in the following chapters Table 4 Overview of operating modes Mode Function Normal GSM GPRS The module will automatically go into SLEEP mode if operation SLEEP DTR is set to high level and there is no interrupt such as GPIO interrupt or data on serial port In this case the current consumption of module will reduce to the minimal level Page 5 ML8021 GPRS Modem User s Manual During SLEEP mode the module can still receive paging message and SMS from the system normally GSM IDLE Software is active The module has registered to the GSM network and the module is ready to send and receive GSM TALK GSM connection is going In this mode the power consumption is decided by the configuration of Power Control Level PCL dynamic DTX control and the working RF band GPRS IDLE The module is not registered to GPRS network The module is not reachable through GPRS channel GPRS The module is registered to GPRS network but no STANDBY GPRS PDP context is active The SCEN knows the Routing Area where the module is located at GPRS The PDP context is active but no data transfer is going READY on The module is ready to receive2. ML8021 GPRS Modem User s Manual M ShenZhen Mellow Technology Co Limited ML8021 GPRS Modem User s Manual GPRS MODEM SERIES www szmellow com z o ET cci Add 218 2nd floor 4 Building Zhuguang Second Industrial Zone XiLi Town NanShan District ShenZhen China Tel 486 755 86507059 Skype ID mellowsales E mail sales szmellow com Website www szmellow com Page 1 ML8021 GPRS Modem User s Manual Content ML8021 GPRS Modem User s Manual rennen eei 1 1 Introduction Mt 3 2 Product CONCERT en GA TS 3 3 Application interface a a D RR 5 3 UPINAESCHPUO Zadna kd redo e WAR AAAA OR ia R CU Pea a GE 5 3 2 Operating MIO BE nennen oai KRA KR AR RAKA ian 5 SA LED ING CO T en 7 3 3 1 Red Led is the power indicates nn AGA ok 7 3 3 2 Yellow Led is MERNGI ACSE ooo Oi mn origo umi bd RR PLUME RP UR onn 7 3 3 3 Green Led is the Working state indicates seen 7 A Mechanical dimension kin aine rw on ov ca carp noc c ana nna 7 sure adR TRE 8 Page 2 ML8021 GPRS Modem User s Manual 1 Introduction This document definesthe ML8021 module series and describes the hardware interface ofthe ML8021 module that connects to the customer application and the hardware interface This document can help customer quickly understand module interface specifications electrical and mechanical details With the help of this document associated application n
3. il receiving OK string from module If you need to using fixed baud rate Then an ATHPR x amp W should be sent to module and save the configuration to flash memory of module After these Page 6 ML8021 GPRS Modem User s Manual configurations the URC RDY would be received from the Serial Port of module every time when the module is powered on Refer to Chapter ATHPR in ARcommand manual 3 3 LED indication 33 1 Red Led is the power indicates 3 3 2 Yellow Led is the RING indicates 3 3 3 Green Led is the Working state indicates The Working state of this LED is list in the table 6 Table 6 Working state of the Green LED state Module Function Off The module is not running Power Off 64ms On 800ms Off The module is not synchronized with network 64ms On 2000ms Off The module is synchronized with network 64ms On 600ms Off GPRS data transfer is ongoing 4 Mechanical dimension 79mm 21 0mm 21 0mm Page 7 ML8021 GPRS Modem User s Manual 5 Product List Module Antenna Standard Supply Power Adapter DC5V 2A RS 232 Cable Standard Supply Page 8
4. or send GPRS data The SGSN knows the cell where the module is located at GPRS DATA There is GPRS data in transfer In this mode power consumption is decided by the PCL working RF band and GPRS multi slot configuration POWER DOWN Normal shutdown by sending the AT QPOWD 1 command using the PWRKEY pin The power management ASIC disconnects the power supply from the base band part ofthe module and only the power supply for the RTC is remained Software is not active The serial interfaces are not accessible Operating voltage connected to VBAT remains applied Minimum Use the AT CFUN command can set the module to a minimum functionality functionality mode without removing the power supply In this case the mode without RF part of the module will not work or the SIM card will not be accessible removing power or both RF part and SIM card will be closed all but the serial port is still supply accessible The power consumption in this case is very low Note The module is set to auto baud rate mode ATHPR 0 in default configuration In the auto baud rate mode the URC RDY after powering on is not sent to host controller AT command can be sent to the module 2 3 seconds after the module is powered on Host controller should firstly send an AT or at string in order that the module can detect baud rate of host controller and it should send the second or the third AT or at string unt
5. otes and user guide customer can use ML8021 module to design and set up mobile applications quickly 2 Product concept The ML8021 is a Quad band GSM GPRS engine that works at frequencies GSM 850M Hz GSM 900M Hz DCS1800M Hz and PCS1900M Hz The ML8021 features GPRS multi slot class 12 and supports the GPRS coding schemes CS 1 CS 2 CS 3 and CS 4 The ML8021 is integrated with Internet service protocols which are TCP UDP FTP and HTTP Extended AT commands have been developed for customer to use these Internet service protocols easily The modules are fully RoHS compliant to EU regulation Table 1 Module key features Feature Implementation Power supply Single supply voltage 5 0V 12V Frequency bands e Quad band GSM850 GSM 900 DCS1800 PCS1900 e The module can search these frequency bands automatically e The frequency bands can be set by AT command e Compliant to GSM Phase 2 2 Transmitting power e Class 4 2W at GSM 850 and GSM 900 e Class 1 1W at DCS1800 and PCS1900 GPRS connectivity e GPRS multi slot class 12 default e GPRS multi slot class 1 12 configurable e GPRS mobile station class B Temperature range e Normal operation 35 C 80 C e Restricted operation 45 C 35 C and 480 C 85 C e Storage temperature 45 C 90 C DATA GPRS e GPRS data downlink transfer max 85 6 kbps e GPRS data uplink transfer max 85 6 kbps Page 3 ML8021 GPRS Modem Use
6. r s Manual e Coding scheme CS 1 CS 2 CS 3 and CS 4 e Support the protocols PAP Password Authentication Protocol usually used for PPP connections e Internet service protocols TCP UDP FTP HTTP MMS e Support Packet Switched Broadcast Control Channel PBCCH e CSD transmission rates 2 4 4 8 9 6 14 4 kbps non transparent e Unstructured Supplementary Services Data USSD support SMS e MT MO CB Text and PDU mode e SMS storage SIM card FAX Group 3 Class 1 and Class 2 SIM interface Port SIM card 1 8V 3V Protected against ESD with a TVS diode array Serial interface e Support from 4800 bpsto 115200 bps default auto baud rate e Support TTL RS232 RS485 e Embed standard AT command GSM 07 05 and 07 07 Phonebook management Support phonebook types SM FD LD RC ON MC SIM Application Toolkit Support SAT class 3 GSM 11 14 Release 99 Physical characteristics 79 53 21mm 1 When the module works in this temperature range the deviations from the GSM specification might occur For example the frequency error or the phase error could increase Table 2 Coding schemes and maximum net data rates over air interface Coding scheme 1 Timeslot 2 Timeslot 4 Timeslot CS 1 9 05kbps 18 1kbps 36 2kbps CS 2 13 4kbps 26 8kbps 53 6kbps CS 3 15 6kbps 31 2kbps 62 4kbps CS 4 21 4kbps 42 8kbps 85 6kbps Page 4 ML8021 GPRS Modem User s Manual
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