I was contacted by a friend to make a device for him. What he needs is as follows.
Collect sensor data and write them on a SD card.
Upload them to some service via GPRS because the device is fixed on a vehicle so WiFi is not an option
Then he should be able to view those data from logging in to that service.
I hope to use a SIM808 module with an Arduino. I have a good background knowledge in programming but this is my first iOT project. Please give me some advice/ideas to make this work.