CMR Projects

Ideal as a starter for a GSM project, easy to hand solder 1.5mm pitch, ARM7 processor based


Prototype PCB available, supplied populated or not, easy "add-on" to existing projects
Includes RXD,TXD,+4Vdc in, +5Vdc in, network activity LED. PWRKEY P/B and drive circuit, for modem start-up
PCB measures 80mm x 50mm

Enquiry for SIMCOM GSM modules and development kits here

The SIM900 is a complete tri-band/quad-band GSM/GPRS solution in a SMT module.
Image shows approximate actual size of the SIM340DZ (left), the new SIM900
and the new GTOP GPS module (on a R1.00 coin)

SIM900 with a tiny configuration, 33mm x 33mm x 3mm, can fit almost all the space requirements in your M2M applications, especially for slim and compact handset applications.

  • SMT type suit for customer applications
  • An embedded powerful TCP/IP protocol stack
  • Based upon mature and field-proven platform, backed up by our support service, from definition to design and production

General features
  • Tri-band GSM/GPRS 900/1800/1900MHz or Quad-band GSM/GPRS 850/900/1800/1900MHz
  • GPRS multi-slot class 10/8
  • GPRS mobile station class B
  • Compliant to GSM phase 2/2+
     – Class 4 (2W @ 850/900 MHz)
     – Class 1 (1W @ 1800/1900MHz)
  • Dimension: 33mm x 33mm x 3mm
  • Weight: 7.8 g
  • Control via AT commands (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands)
  • SIM application toolkit
  • Supply voltage range 3.4V...4.5V
  • Low power consumption 
  • Normal operation temperature: -30 °C to +80 °C
  • Restricted operation temperature: -40 °C to -30 °C and +80 °C to +85 °C
  • Storage temperature: -45°C to +90°C

Specifications for fax
  • Group 3, class 1

Specifications for data:
  • PBCCH support
  • GPRS class 10: max. 85.6 Kbps (downlink)
  • PPP-stack
  • Coding schemes CS 1, 2, 3, 4
  • CSD up to 14.4 kbps
  • USSD
  • Non transparent mode

Specifications for SMS via GSM
  • Point-to-point MO and MT
  • SMS cell broadcast
  • Text and PDU mode

Specifications for voice
  • Tricodec
– Half rate (HR)
– Full rate (FR)
– Enhanced Full rate (EFR)
  • Hands-free operation (Echo suppression)

Interfaces
  • Interface to external SIM 3V/1.8V
  • Two analog audio interfaces
  • RTC backup
  • Serial interface and debug interface
  • LCD interface
  • Keypad interface
  • Antenna connector and antenna pad
  • GPIO

Data Sheet Here 81KB in PDF format
Enquiry for SIMCOM GSM modules and development kits here

SIM908 module is a compact Quad-band GSM/GPRS-enabled module that is also equipped with GPS technology for satellite navigation. The compact design of the SIM548C makes it easy to integrate GSM/GPRS & GPS as an all-in-one solution. You will save significantly both time and cost for the integration of additional hardware components.

Featuring an industry-standard interface and GPS function, the combination of both technologies allows valuable asset to be tracked seamlessly at any location and anytime with signal coverage.

General features
  • Quad-Band GSM 850/900/1800/1900MHz
  • GPRS multi-slot class 10
  • GPRS mobile station class B
  • Compliant to GSM phase 2/2+
     - Class 4(2W @ GSM850/900MHz)
     - Class 1(1W @ GSM1800/1900MHz)
  • Control via AT commands (GSM 07.07 and 07.05 and SIMCOM enhanced AT commands)
  • SIM application tool kit
  • Low power consumption
  • Supply voltage range 3.4…4.5 V
  • Normal operation temperature: -30°C to +80°C
  • Restricted operation temperature: -40°C to -30°C and +80°C to +85°C
  • Storage temperature: -45°C to +90°C
  • Dimension: 50mm x 33mm x 8.8mm

Specifications for GPS
  • Receiver 20 channels, L1 1575.42 MHz, C/A code 1,023 MHz chip rate
  • Accuracy Position 2.5 m CEP
     –without SA/Velocity 0.1 m/s,
     –without SA/Time 1 μs synchronized to GPS time
  • Position with DGPS/SBAS: 2.0 CEP
  • Date WGS-84
  • Acquisition rate (TTFF defined at 95% of first position local station)
     – Hot start < 1 s, average, open sky
     – Warm start: 35 s, average, open sky
     – Cold start: 35 s, average, open sky
  • Support AGPS
  • Operating voltage 3.3 V DC ±5%
  • Low power consumption 160mW at 3.3 V (full power)
  • Protocols
     – NMEA-0183
     – SiRF binary
     – RTCM SC-104
  • Crystal oscillator (TCXO), temperature compensated with frequency stability of ±0.5 ppm
  • Memory 4 Mb flash and 1Mb SRAM

Interfaces
  • 60-pin DIP connector
  • Interface to external SIM 3V or 1.8V
  • Dual analog audio interface
  • AT commands via serial interface
  • Embedded SIM card holder
  • LCD Interface
  • RTC Backup
  • Charge interface
  • Serial interface and Debug interface
  • Dual serial interfaces for GPS
  • Two separate antenna connectors for GSM/GPRS & GPS and two antenna pads for GSM/GPRS & GPS

Enquiry for SIMCOM GSM modules and development kits here

SIM20-EVB, with USB interface - now R165.00

Enquiry for SIMCOM GSM modules and development kits here

A complete ready-to-run RS232 GPRS terminal, supplied complete with power supply and connections, antenna, SIM card holder (excludes SIM card). Uses standard AT commands and can be configured using HyperTerminal or any PC based terminal package. All this for R780.00 !