interface and controller card for android tablet

This project received 16 bids from talented freelancers with an average bid price of $1245 USD.

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Project Budget
$250 - $750 USD
Total Bids
Project Description

I want you design an interface/controller card which will be connected to an android 4.0 tablet via USB port.

Card should have following ports on it.

- 1 PSU port for psu

- 1 USB port to connect to android tablet

- 2 analog port to read 4-20 mAmp devices

- 2 Onewire digital interface to read temperature sensors like DS 18s20

- 2 RS485 port for communication with external devices

- 1 RS232 port for Thermal Printer

- 10 Relay to control external devices

- 5 analog input to read shaft encoders

- RFID reader to read RFID Cards

- 2 port to read loadcell units

Designer should design pcb and also write a sample android application which can :

- read&show shaft encoder turns

- read temp values

- can open or close relays based on predefined conditions

- can read analog devices

- can printout data it reads or processed

- can read and identify rfid card

- can send processed data real time from rs485 ports.

Please keep in mind that application should be designed to work 7 day 24 hours.

All source codes and pcb design datas will be given to us.

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