JavaME: Read RS232 sensor on mobilephone and send SMS with results

**Platform:**

- Language: JavaME 2.0

- Working on (older) Siemens / Nokia / Sony / Toshiba low budget mobile phones with rs232 connection. Example: Siemens C65 or C6? / C7? Series

**Abstract:**

Task1: Connect a Sensor (working on RS232 @ 5V) to a mobile phone and collect data periodically

Task2: The mobile phone sends SMS with the measured data to a phone number specified in an extra configuration file.

Task3: Every incoming SMS is scanned for changed configuration data for remote administration.

- if possible, the program should run eternally and restart after power interruption

## Deliverables

**Program in detail:**

**Task1: Connect a Sensor (working on RS232 @ 5V) to a mobilphone**

- We provide you the Sensor & Example code

- We provide you an old Siemens C65 which should be good for testing and connection cables

- We provide, if necessary Max232 connectors

- Coder connects Sensor to mobilphone and reads out periodically the sensor data

(e.g. every 15min / 1h / 24h / every day at 7am / > do this> Take 100 valid measurements over 2 minutes and build the average value)

- Coder finds other compatible mobile phones that have an RS232 port and that might work with his software

(at least 5 more which work in european GSM frequencies)

Note: I needed less than 1 hour to write the sample programm in VB6.0 on Desktop PC.

Very good English sensor documentation available

It should be less than 2 days work for an experienced java coder.

**

Task2: The mobile phone sends a sms with the measured data to a phone number specified in an extra configuration file.**

** 4 Options have to be included**

- Data is send imetiately after every measurement

(Format: Value | fulldatetime_of_last_measurement )

- Or after enough DATA gathered to fill one SMS (160 Byte )

(Format: Value | seconds_to_next_measurement | Value | seconds_to_next_measurement | Value |...... Value | fulldatetime_of_last_measurement )

- Or only if there was a change in measurements results of more than [url removed, login to view]% / or +- X steps.

Format as above:

(Format: Value | seconds_to_next_measurement | Value | seconds_to_next_measurement | Value |...... Value | fulldatetime_of_last_measurement )

- Or Data is send once as an answer to any mobile phone requesting data via incoming SMS

(Format: Value | fulldatetime_of_last_measurement )

** The config file contains:**

- Point of time / intervall for measurement and sending

- phone number to send data to

- text header for sms

- Valid upper measurement value boundary

- Valid lower measurement value boundary

**Task3: Every incoming sms is scanned for configuration data.**

** For remote administration**

- If config data is found, it replaces the data in the configuration file

- measurement starts with new rules from config file and the first sms is send to the number specified in the config file

- the next automatic measurement and SMS is done according to the new config data

- all incoming sms are deleted to keep the phonememory empty

**

Important:**

- This program must work without user input until the battery is empty

- If you find a phone that allows automatic restart of the measurement process after power returns without user interaction

I'll pay you a bonus 50$. I know there are some around that can start java midlets on startup.

Think about solar powered solutions! no electricity over night!

- if the whole program runs stable solar powered for more than two weeks without user interaction, the bonus rises to 100$

- if the whole program runs stable solar powered for more than two weeks without user interaction, and the coder works autonomous and 100% reliable, the bonus rises to 200$

**Time Estimation:**

- 1 day for set up work environment and read the manuals

- 2 days: to connect the sensor and make regular reliable measurements (see examples provided in VB6.0)

- 1.5 days: for the send_data_sms function (Use examples / templates from SUN website)

- 1.5 days: for the receive_config_sms function (Use examples / templates from SUN website)

- 1 day to document the project and to make it easy to read code

**Note:**

- The JavaME-Website of SUN provides ready-to-use examples for receiving and sending sms.

- source code and a debugged, ready-to-use executable has to be provided to us.

- all source code has to be explained with comments at least (50% source / 50% comment)

- use easys to understand english variable names and care for the code readability

- Phone and sensor have to be returned with full functional software installed. (The working example is one major point!)

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Project ID: #3268317

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