Blog – Page 3 – Valetron Systems

SIM868 vs SIM808 – Differences and Comparison | Which to choose?

March 17, 2018 / 488

In this post we will learn the differences between the old GSM+GNSS enabled combo modules SIM808 and the new module SIM868. The SIM868 is a... Continue reading

Designing a 3G Foaling Alarm and GPS tracker

March 17, 2018 / 320

In this post you will see how we built a 3G GPS tracking device or Foaling alarm which can be used for vehicle as well... Continue reading

Difference between SIM5320 and SIM5360 modules

March 14, 2018 / 332

In this post we will learn the differences between the 3G modules in SIM5320 and SIM5360 series. Both these modules from SIMCOM 3G/UMTS/WCDMA module family... Continue reading

Learn, How to save MQTT messages into a MySQL Database

March 6, 2018 / 424

I had been experimenting with MQTT and was able to publish and subscribe messages through different local and cloud MQTT brokers successfully. But when it... Continue reading

Arduino DTMF tutorial using SIM900/SIM800 modules – LIVE DEMO

February 28, 2018 / 545

In this post we will see and understand how we can use the DTMF feature of SIM900 /SIM800 GSM modules for controlling devices or appliances.... Continue reading

Learn about the SIM800/SIM900 auto power on feature

February 9, 2018 / 533

Are you wondering how to auto turn on the GSM modules like SIM900 or SIM800. This article is just for you. Although these modules come with... Continue reading

GPS Tracker with LONG battery life – Lasts more than a year

December 28, 2017 / 372

In this post i will show you a new version of the GPS tracker i designed for a client in Europe. I got this requirement when... Continue reading

Google Speech Recognition HTTP API – Tutorial with Live Demo .. !

November 19, 2017 / 310

In this post i am going to show you how we can use the Google's Speech API for speech recognition or speech to text conversion.... Continue reading

Started a SMT PCB assembly unit – #MakeInIndia

September 20, 2017 / 382

I had been tired of waiting to get my boards assembled, There was lot of time wasted in sending boards outside for assembling . I... Continue reading

MQTT Protocol tutorial using SIM900/SIM800 modules – MQTT over TCP

August 30, 2017 / 696

In this post, i will show you how you can send and receive MQTT packets over the TCP connection created using the SIM800/SIM900 GSM GPRS... Continue reading

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