GTM900C GTM900B GSM GPRS DTU module ARM STM32F103RBT6 development board STM32
On-board resources
1.MCU STM32F103RBT6.
2.GSM/GPRS GTM900C.
3.EEPROM 24C16.
4.STM32 serial 3, GTM900C serial 1.
5.wide voltage input, two-way power supply not interfere.
6.SIM deck
7.GTM900 support MCU Start-up and manual start
8.compatible with Siemens, Huawei GTM900C GTM900B TC35 TC35I MC39I other
Board characteristics
1 ARM chip STM32F103RBT6
2 ARM interface almost all extraction.
3 ZIF40 interface, Siemens and Huawei are all compatible.
4 Good code, stable data communication
5 modules and ARM are independent power supply
6 supports the ARM three independent serial debugging GTM900C independent debugging.
7 Support wide input voltage and its ultra-high-power, the default 7-25V.
8 GTM900C support manual start and ARM start.
9 providing a lot of information and video tutorials.
10 providing technical support
GTM900CFeature
Feaure | Description |
Working frequency bands | Dual band EGSM900/GSM1800 |
Maximum transmit power | EGSM900/GT800 Class4(2W) |
GSM1800 Class1(1W) | |
Receive sensitivity | <-106dBm |
Working temperature | -30C +75C |
Powere voltage | 3.3V4.8V (recommended value3.8V) |
Average standby current | TBD |
Power-off leakage current | TBD |
Protocols | GSM/GPRS Phase2/2+ |
Huawei GT800 | |
AT commands | GSM AT commands |
V.25 AT commands | |
Huawei extended AT commands | |
40PIN FPC connectors | UART interfacemaximum baud rate of the serial port:115200bit/s |
Standard SIM card interface1.8V or 3V | |
Two analog audio interfaces | |
Power supply interfaces | |
GSC RF antenna connector | 50¦ GSC antenna connector |
Voice service | FR, EFR, HR and AMR Voice encoding |
Calls in hands-free mode | |
Echo cancellation function | |
SMS | MO and MT |
Point-to-point and cell broadcast | |
Text messages in TEXT and PDU modes | |
GPRS data service | GPRS CLASS 10 |
Encoding schemes:CS 1CS 2CS 3 and CS 4 | |
Maximum rate:85.6Kbit/s | |
PBCCH | |
Embedded TCP/IP protocol suitesupports multiple linksand provides ACK answer and large-capacity cache. | |
Circuit data service | CSD service(maximum rate: 14.4Kbit/s) |
Fax serviceGroup3 Class2.0 | |
USSD service | |
Supplementary | Caller ID display |
Call forwarding | |
Call holding | |
Call waiting | |
Tree-party calls | |
Trumking | Group calls |
Broadcasts | |
Private calls | |
STK | STK function supported bu using enhanced AT commands |
RoHS | Compliance with the RoHS Directive |
STM32F103RBT6 parameters:
CPU frequency (M) 72
FLASH (byte) 128KB
RAM (byte) 20KB
Timer 4
SPI interface 2
the IIS interface 2
the IIC interface 2
USART interface 3
USB interface 1
CAN Interface 1
SDIO interface 1
ADC (channel) 16
I/O ports 51
package LQFP64
Package list
ARM DTU development board: 1 (on-board with GTM900C module and STM32F103RBT6)
12V/1A External power supply: 1
RS232 serial line: 1
GSM special antenna: 1
Special antenna adapter cable: 1 (welding fixed on the PCB)
Install copper column: 4
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