Right now SIM900 and SIM800 GSM/GPRS modules might seem like the perfect choice for using in your upcoming IOT product design, as they are the most widely used GSM/GPRS modules across the world as of now. But they are not really a good choice for new products which are going to be used in U.S.A. 

If you are planning on a wireless project which might run on the 868 MHz frequency band in India, then its better to be clear if you are allowed to use that frequency for transmissions instead of facing problems from government organizations in the future.

I again forgot and faced problems with SIM808 GSM/GPRS/GPS module GPS engine not being able to acquire location fix from the satellites.

This time the circuit i designed was an add on for a Alcohol sensor+GPS vehicle tracking system.

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 location fix from the satellites.

The circuit i designed was for a vehicle tracking system product. We chose SIM908 because it was the most economical option which suited the requirement.

About the Author

is the author of this blog and is an Embedded systems design engineer by profession & Founder @ Valetron Systems Pvt Ltd

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