I have read your proposal of automatic measurement and weighing of parcel and insert in a database.
Iam an IoT developer working for as a freelancer in Hyderabad and have developed IoT products which include data insertions and retrieval from database. I have worked on NODEMCU, ESP8266, Arduino, Raspberry Pi etc and all other modules like gsm, GPS, Bluetooth and various sensors. So i can provide your requirement perfectly. Describe your project so that we can start developing.