S14: Android based Automation - Revision history

Preet: /* Project Source Code */

2014-08-06T23:43:12Z

‎Project Source Code

Preet: /* Grading Criteria */

2014-05-26T19:24:11Z

‎Grading Criteria

Proj user6: /* References Used */

2014-05-25T08:14:47Z

‎References Used

Proj user6: /* Acknowledgement */

2014-05-25T08:14:00Z

‎Acknowledgement

Proj user6: /* Hardware Interface */

2014-05-25T06:46:04Z

‎Hardware Interface

Proj user6: /* Hardware Interface */

2014-05-25T06:43:47Z

‎Hardware Interface

Proj user6: /* Hardware Design */

2014-05-25T06:41:49Z

‎Hardware Design

Proj user6: /* Hardware Design */

2014-05-25T06:39:02Z

‎Hardware Design

Proj user6: /* Abstract */

2014-05-25T06:37:29Z

‎Abstract

Proj user6: /* Implementation */

2014-05-25T06:08:35Z

‎Implementation

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 === Project Source Code ===
-Send me your zipped source code and I will upload this to SourceForge and link it for you.
+*  [https://sourceforge.net/projects/sjsu/files/CmpE244_SJSU_S2014/ Sourceforge source code link]
 == References ==

← Older revision		Revision as of 19:24, 26 May 2014
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−	~~=== Grading Criteria ===~~
−	~~<font color="green">~~
−	* How well is Software & Hardware Design described?
−	* How well can this report be used to reproduce this project?
−	* Code Quality
−	* Overall Report Quality:
−	** Software Block Diagrams
−	** Hardware Block Diagrams
−	**: Schematic Quality
−	** Quality of technical challenges and solutions adopted.
−	~~</font>~~
−
	== Project Title ==		== Project Title ==

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 === References Used ===
-List any references used in project.
+Android App- https://developer.android.com/guide/index.html
 === Appendix ===
 You can list the references you used.

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 == References ==
 === Acknowledgement ===
-Any acknowledgement that you may wish to provide can be included here.
+Preet Kang
 === References Used ===

← Older revision		Revision as of 06:46, 25 May 2014
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	'''GPIO Port:'''		'''GPIO Port:'''

−	The GPIO port is used to enable or disable the transistor and the indicator LED. When the LPC1768 micro-controller recognizes a pass code that is sent from the Android, it will send 3.3V through the GPIO which is connected to the relay circuit. Above is the GPIO initialization function. We have used port-1 pins that is P0.0 and P0.1 pins to give a 3.3V voltage to the relay circuit board. First the pins need to be selected and then the direction of the pin needs to be specified. For instance an output pin would be set to a 1 while an input would be set to 0.	+	The GPIO port is used to enable or disable the transistor and the indicator LED. When the LPC1768 micro-controller recognizes a pass code that is sent from the Android, it will send 3.3V through the GPIO which is connected to the relay circuit. Above is the GPIO initialization function. We have used port-0 pins that is P0.0 and P0.1 pins to give a 3.3V voltage to the relay circuit board. First the pins need to be selected and then the direction of the pin needs to be specified. For instance an output pin would be set to a 1 while an input would be set to 0.

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 '''UART Bus:'''
-The UART bus is used to communicate between Bluetooth device and the micro controller. UART pins are power on the SJ One board using UART init function API provided by the FreeRTOS. The initialized pins are driven by the UART driver to handle the communication. Each of the UART pin if logic high produce a output voltage of 3.3V and if logic low produce a 0.0V. The SJ One board has a switch between UART-2 & UART-3, to make a selection. If we want to uses both for them then we have to use them as GPIO pins.
+The UART bus is used to communicate between Bluetooth device and the micro controller. UART pins on the SJ One board are enabled using UART init function API provided by the FreeRTOS. The initialized pins are driven by the UART driver to handle the communication. Each of the UART pin if logic high produce a output voltage of 3.3V and if logic low produce a 0.0V. The SJ One board has a switch between UART-2 & UART-3, to make a selection. If we want to uses both for them then we have to use them as GPIO pins.
 '''GPIO Port:'''

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 '''Electrical Switching Circuitry:'''
-The electrical switching is done using a circuitry which uses relays to switch the lines. The voltage we handle here is 110V and frequency 60Hz. The transistor used in here produce sufficient current that is approximately 200mA with a voltage supply of 9V rather than traditional 5V supply with drives less current when used against SJSU One board and it is used to switch the operation of the relay. The 3.3V supplied by the SJSU One board from the GPIO port is not sufficient to power the relay so the relay control board is been used in this project. As seen below, the circuit consists of a transistor, an LED, and a power supply.
+The electrical switching is done using a circuitry which uses relays to switch the lines. The voltage we handle here is 110V and frequency 60Hz. The transistor used in here produce sufficient current that is approximately 200mA with a voltage supply of 9V rather than traditional 5V supply which drives less current when used against SJSU One board and it is used to switch the operation of the relay. The 3.3V supplied by the SJSU One board from the GPIO port is not sufficient to power the relay so the relay control board is been used in this project. As seen below, the circuit consists of a transistor, an LED, and a power supply.
 [[File:CMPE244 S14 Relay mod.jpg|280px||center|Relay Board Circuit]]
 The LED is connected to the control signal to show whether the relay should be turn on or turn off. The transistor acts as a switch to enable and disable the relay depending on the signal received from SJ One board.
-When the LPC 1768 gets the data frame from the Android application it processes it for signal and pass code where signal is processed in switch_task in our program to act accordingly. The pass code is matched against the codes which are pre assigned to identify the user.
+When the LPC 1768 gets the data frame from the Android application it processes it for signal and pass code where signal is processed in switch_task in our program to act accordingly. The pass code is matched against the codes which are pre-assigned to identify the user.
 [[File:CMPE244 S14 Relay Board Circuit.jpg|550px||center|Relay Board Circuit]]

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 '''Device and Pin Functionality:'''
-The device comes with 4 pins. The pin functionalities are VCC, GND, and Rx & Tx. The bottom of the device labels the 4 pins. The VCC pin is connected to 3.3V power supply. The device is powered and communicated with SJ One micro controller through UART3 Bus. Connections such as VCC, GND, Rx, Tx of device are made to 3.3V, GND, Tx, Rx of controller respectively.
+The device comes with 4 pins. The pin functionalities are VCC, GND, Rx & Tx. The bottom of the device labels the 4 pins. The VCC pin is connected to 3.3V power supply. The device is powered and communicated with SJ One micro controller through UART3 Bus. Connections such as VCC, GND, Rx, Tx of device are made to 3.3V, GND, Tx, Rx of controller respectively.
 [[File:CMPE244 S14 Jy-mcu-bt board-v1-05-bottom-side.jpg|200|thumb|center|Bluetooth Device - Linvor v1.05]]

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 This project is to develop an Android application which can be used to switch an electrical appliance On/Off, and notify the status to the user through his mobile device. Here we connect an Android Application running device to the SJSU One board using Bluetooth device and make the board detect the signals coming from the Android device via a Bluetooth module. This board generates operation in according to the incoming signals.
-This board will be connected to relays which inturn are powered by 110V power supply. The power supply neutral wire is connected to a relay, where it controls the flow in according to the instruction it gets from the Android application.
+The board will be connected to relays which inturn are powered by 110V power supply. The power supply neutral wire is connected to a relay, where it controls the flow in according to the instruction it gets from the Android application.
 == Objectives & Introduction ==

← Older revision		Revision as of 06:08, 25 May 2014
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	'''Get Data Task:'''		'''Get Data Task:'''

−	Get data task is where the data frame is received from the Android application. By using the FreeRTOS API's we receive the data from the UART-3 receive ~~line~~. The data received is in character then we convert it to the format we needed. Then the pass code is compared against the pre-defined codes, if there is a match then we proceed onto add the signal into the queue. The tasks get context switched because the switch task is with higher priority. Once the data is written into the queue then immediately the switch task starts running, where it receives the signal from the queue. The detailed data flow is as follows.	+	Get data task is where the data frame is received from the Android application. By using the FreeRTOS API's we receive the data from the UART-3 receive wire connection. The data received is in character then we convert it to the format we needed. Then the pass code is compared against the pre-defined codes, if there is a match then we proceed onto add the signal into the queue. The tasks get context switched because the switch task is with higher priority. Once the data is written into the queue then immediately the switch task starts running, where it receives the signal from the queue. The detailed data flow is as follows.