REMOTE MONITOR OF Microcontroller pins status on a server via gprs data.....

Dear Friends ,

I want to remote monitor some alarms ,i.e pins of microcontroller status ( low or high) and some adc data , via a remote location using gprs data as medium....


1. I.e hardware will be connected to sim 800 module , it will send status based on request from some location .
2. The data will communicate over TCP/IP protocol . for that my hardware will act as client and say my laptop will act as server .

My network is shown as follows :




The problem is :

when i run socket test application on my laptop , where i configure my laptop as server and start listening on port 350 .I haVe configured my router(ROUTER ADDRESS 192.168.1.1) to port forward 350 for TCP.

even after port forwarding my router , i am still not able to connect the sim800 module via AT+CIPSTART="TCP","PUBLIC IP ADDRESS","PORT"

It shows following pattern :

ATOK
AT+CIPSHUT
SHUT OK
AT+CIPMUX=0
OK
AT+CGATT=1
OK
AT+CSTT="www","",""
OK
AT+CIICR
OK
AT+CIFSR
100.107.139.150
AT+CIPSTART="TCP","139.5.241.161","350"
OK


STATE: TCP CLOSED


CONNECT FAIL



Please tell me how to connect my gsm modem to server listening to a port.
If i get to connect this command so that socket test shows connected , i can proceed further .

I want to know where i am wrong.......

Hi,

for that my hardware will act as client and say my laptop will act as server .

Click to expand...

Are you sure? Usually it's the other way round.

Klaus

Yes I m sure , My laptop wil act as server , and hardware will act as client......

The hardware is connected to gsm/gprs module using sim 800 .....

My problem is that AT+CIPSTART command returns OK , but CONNECT OK IS not returned......

I have opened port 350 on socket test.....My laptop is listening on port 350 using socket test application . But The :
AT +CIPSTART COMMAND doesnt return CONNECT OK....

What should be done in such case.....I think either there is something wrong with port forwarding(But i have already configured my router to port forward 350 ).
In the image of router detect , i see 2 routers in between my pc and internet cloud , One is the router that i have in my house on which i have done port forwarding , But i dont have access to other router ......

Could this be a issue ?

PLease suggest how to proceed where i could be wrong?

Hi,

could you draw a sketch of the complete signal flow, with all the devices involved?

Klaus

Yes wait......