TK-102 Traker pinout

Pin count starts from the left side.

PC Connection

Using a USB 2.0 to UART TTL converter i was able to communicate with my TK-102.

This TK-102 is based on 89LE58RD MCU

GSM Modem

When i connected pins 4&5 i was able to communicate with the GSM modem and send AT commands. 

Speed: 19200bps

Here is the serial terminal output, i tried some at commands.

RDY  
+CFUN: 1  
+CPIN: 
READY 
Call Ready 
ati0  
SIM900B R11.0  
OK 
ati4  
SIMCOM_Ltd SIMCOM_SIM900B  
OK 
ati5  
SIMCOM_Ltd

Having pin 4 disconnected , allows for monitoring communication between GSM modem and MCU.

AT+CREG?

+CREG: 0,5

OK
TRACKER102_AOHANG_AMERICA_2.1AT+CIPCSGP=1
OK
AT+CIPMUX=0
OK
AT+CIPSPRT=0
OK
AT+CPMS?

+CPMS: "SM",0,30,"SM",0,30,"SM",0,30

OK
AT+CIPSTATUS
OK

STATE: IP INITIAL
AT+CSTT="globaldata","",""

OK
AT+CBC

+CBC: 0,93,4105

OK
AT+CIPSTATUS
OK

STATE: IP START
AT+CIICR
OK
AT+CIFSR
172.29.17.204
AT+CIPSTART="TCP","tracking.stadar.org","5001"

OK

CONNECT OK
AT+CIPSEND
imei:353451042852408,tracker,0000000000,user pass,L,;

SEND OK

GPS Data

Pin 6 outputs GPS data.

Speed: 4800bps

$GPRMC,235950.029,V,,,,,,,310307,,,N*48
$GPGGA,235951.029,,,,,0,00,,,M,0.0,M,,0000*54 
$GPGSA,A,1,,,,,,,,,,,,,,,*1E 
$GPGSV,3,1,12,20,00,000,,10,00,000,,31,00,000,,27,00,000,*7C 
$GPGSV,3,2,12,19,00,000,,07,00,000,,04,00,000,,24,00,000,*76 
$GPGSV,3,3,12,16,00,000,,28,00,000,,26,00,000,,29,00,000,*78