Blog – Page 6 – Valetron Systems

SIM908 GPS Active antenna unable to acquire fix – Solution

May 12, 2016 / 623

I have been working with SIM908 GSM/GPRS/GPS combo module for some time and faced problems with the SIM908 GPS engine not being able to acquire... Continue reading

SIM900/SIM800 not working – Possible reasons – Tips n Tricks

April 21, 2016 / 1297

The thing with SIM900/SIM800 is there can be multiple reasons that the AT commands are not working, I have listed down a few of them which... Continue reading

Using SIM900 as TCP server ? – Read this first !!

December 3, 2015 / 770

Are you thinking to use your SIM900 GSM/GPRS module as TCP server then you should re consider your decision. Because although SIM900 can run as... Continue reading

Getting your electronics product manufactured in India

November 17, 2015 / 560

Are you looking to get your electronics product manufactured in India, then keep reading. You can get all the electronic manufacturing services at very economical... Continue reading

SIM900 GPRS EMAIL AT Commands

November 5, 2015 / 1288

This article is about showing you how to send a email using SIM900 GSM/GPRS module. SIM900 GSM module provides a set of AT commands which... Continue reading

SIM900 GPRS HTTP AT Commands

October 10, 2015 / 1947

This article is about showing you how to get the contents of a web page from and upload a file to a web server using... Continue reading

SIM900 FTP Commands

September 29, 2015 / 910

This article is about showing you how to upload a file and download a file form a web server using FTP protocol. SIM900 GSM module... Continue reading

How to access external memory in Android Lollipop and above [Solution]

September 8, 2015 / 636

Recently i was doing a project for my client where in it was required to access a USB bar code scanner manufactured by MARSON Tech,... Continue reading

SIM900 DTMF commands

August 13, 2015 / 1110

This article shows how to use the inbuilt DTMF decoder present in SIM900/SIM800/SIM908 GSM modules. Earlier we used some external DTMF decoder chips like MT8870... Continue reading

SIM900 / SIM800 USSD Code AT Commands – Working example

June 17, 2015 / 1456

Are you wondering how to check the SIM card balance using USSD code using AT commands, You have come to the right place. This post is about... Continue reading

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