Blog – Page 4 – Valetron Systems

Getting Network Location using SIM900 GSM modules

August 30, 2017 / 1132

In this article we will see how we can retrieve the cell location or network location of the SIM900 GSM module. This feature is particularly... Continue reading

MQTT Protocol tutorial using Mosquitto and CloudMQTT

August 30, 2017 / 821

What is MQTT? MQTT protocol is one of the simplest and light weight protocol used in the Internet of Things networks. MQTT supports small headers... Continue reading

SIM900/SIM800 Sleep mode AT Commands

August 9, 2017 / 1453

This article is about explaining about the sleep mode AT commands of the SIM900/SIM800 GSM GPRS modules. These modules support two sleep modes for conserving... Continue reading

Using Arduino with SIM900/SIM800 for receiving SMS commands

July 25, 2017 / 633

In this post i will be showing you how to write a simple piece of code using Arduino for SIM900 or SIM800 GSM GPRS module... Continue reading

Designing a Low cost GSM/GPS tracker – V2.1 Design Update – Part 4

June 26, 2017 / 785

Hey Guys, This post is to update you guys that i am doing a redesign of the PCB with some modifications to the size and... Continue reading

Designing a Low cost GSM/GPS tracker – SMS Tracking Demo – Part 3

June 5, 2017 / 713

Last week the assembled boards have finally arrived and in no time I was able to get the VALTRACK-V2 up and running as the software... Continue reading

Designing a Low cost GSM/GPS tracker – Update – PCB’s arrived – Part 2

April 21, 2017 / 831

This is a update post in the design of VALTRACK-V2 GPS tracker. The PCB i had sent for fabrication have arrived from PCB power and... Continue reading

Designing a Low cost GSM/GPS tracker – Introduction – Part 1

April 17, 2017 / 749

This is a introduction post regarding my new GPS tracker design VALTRACK V2. This is a second version of the GPS tracker i had designed... Continue reading

Difference between X7R, X5R, X8R, Z5U,Y5V, X7S, C0G Capacitor dielectrics

April 13, 2017 / 3295

In this article i am explaining the differences between different Ceramic capactior dielectric materials like X7R, X5R, X8R, Z5U,Y5V, X7S, C0G. I used to encounter... Continue reading

Read this before replacing batteries – 4 points to keep in mind

April 1, 2017 / 647

In this article i am explaining the 4 points to keep in mind when you are replacing batteries. When we are trying to replace a non... Continue reading

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