S14: Smart Planter - Revision history

Preet: /* Project Source Code */

2014-08-07T00:00:08Z

‎Project Source Code

Proj user19: /* Appendix */

2014-05-23T14:57:25Z

‎Appendix

Proj user19: /* Software Design */

2014-05-22T23:19:48Z

‎Software Design

Proj user19: /* Appendix */

2014-05-22T23:17:02Z

‎Appendix

Proj user19: /* Hardware Interface */

2014-05-22T23:16:09Z

‎Hardware Interface

Proj user19: /* Software Design */

2014-05-22T23:14:25Z

‎Software Design

Proj user19: /* Software Design */

2014-05-22T23:14:00Z

‎Software Design

Proj user19: /* Hardware Design */

2014-05-22T23:11:39Z

‎Hardware Design

Proj user19: /* Hardware Design */

2014-05-22T23:11:23Z

‎Hardware Design

Proj user19: /* Hardware Interface */

2014-05-22T23:09:57Z

‎Hardware Interface

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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 14:57, 23 May 2014
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	Socialledge I2C tutorial		Socialledge I2C tutorial
−
−	~~=== Appendix ===~~
−	~~See references used.~~

@@ Line 207: / Line 207: @@
   delay loop for 50ms
-The check reading task, when activated, updates the temperature and soil moisture and fetches the current time. If the moisture level, which ranges from ~14-50 is below 20 or the temperature is above 90*F, then the motor is activated for three seconds and the time last watered is updated. The motor is activated for two seconds is the temperature is between 80*F and 90*F or is the moisture level is less than 30. The motor is activated for one second if the temperature is between 70*F and 80*F or the moisture is below 40. If it does not fit into these parameters, than the plant is deemed to not need water and the power is not powered nor is the time watered updated.
+The check reading task, when activated, updates the temperature, soil moisture, and fetches the current time. If the moisture level, which ranges from ~14-50, is below 20 or the temperature is above 90*F, then the motor is activated for three seconds and the time last watered is updated. The motor is activated for two seconds if the temperature is between 80*F and 90*F or if the moisture level is less than 30. The motor is activated for one second if the temperature is between 70*F and 80*F or the moisture is below 40. If it does not fit into these parameters, than the plant is deemed to not need water and the power is not powered nor is the time watered updated.
 The individual drivers for the peripherals will be described in the implementation section.

← Older revision		Revision as of 23:17, 22 May 2014
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	=== Appendix ===		=== Appendix ===
−	~~You can list the~~ references ~~you~~ used.	+	See references used.

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 Each of the peripherals utilized a different type of BUS communication. The soil hygrometer works by sending voltage through the pegs, measures the resistance between them, a value dependent on the moisture level, and translates this information into an analog output. Therefore, the pin is attached to one of the analog to digital pins on the board in order to translate the signal into a number that will determine the appropriate level. While the original intent for the project was to use the DHT22 temperature/humidity sensor, the protocol was more complicated than initially anticipated so the sensor was exchanged for the on-board I2C sensor. Since significant strides were made in the development of the DHT driver, its description has been included. The DHT22 utilizes a custom single-line open collector communication BUS connected to +5V, ground,  and a 10kohm resister connected from voltage to the communication pin to pull it high. The sensor waits for the microcontroller to pull the line low for 1-20ms, then pulls the line actively high for 20-40us. The microcontroller then needs to switch to an input to receive the acknowledge signal followed by 40 bits. The bits are determined 0 or 1 by the length of how long the particular segment of data is high or low. The sensor needs to wait 2s in between reads and critical read times need to be protected from being interrupted in order to be successful.
-[[File:SensorWaveform.jpg|400px|center|frame|DHT22 Sensor Waveform for acknowledge]]
+[[File:CmpE146 S14 SensorWaveform.jpg|400px|center|frame|DHT22 Sensor Waveform for acknowledge]]
-The on-board temperature sensor utilizes an I2C communication which has two data lines: SDA for the address, acknowledge, and data while the SCL line is used for the clock to time the information. The read temperature class has the microcontroller acting as the master and reading from the slave device, the temperature sensor. The clock is provided by the master device to the slave so that the communication can be in sync. The connections for this device are internal and can be seen on the right: [[File:Temperature sensor.JPG|200px|thumb|right|I2C Temperature Sensor Set Up, Credit to SJSUONE_V2 Schematics]]
+The on-board temperature sensor utilizes an I2C communication which has two data lines: SDA for the address, acknowledge, and data while the SCL line is used for the clock to time the information. The read temperature class has the microcontroller acting as the master and reading from the slave device, the temperature sensor. The clock is provided by the master device to the slave so that the communication can be in sync. The connections for this device are internal and can be seen on the right:

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 === Software Design ===
 The software for the planter used FreeRTOS as a base with two main tasks for the scheduler: a standby task that passed the information to the LCD to be printed on the board and a check reading task. The standby task was not passed as a semaphore since the check reading task was only activated if either alarm semaphore handler or the button press handler was taken. The standby task was run automatically. The standby task reads as follows:
 while (1)
   get current time
   send the last time plant was watered to first line of LCD

← Older revision		Revision as of 23:11, 22 May 2014
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	The hardware for the project was broken down by the needs of the different sensors. To have the design function as expected, the team required circuitry to provide the appropriate power to each peripheral as well as the microcontroller. The Basic System Design, shown in the figure below, shows how each component was laid out onto the base board. The LCD, SJSUONE board, and prototype board is set inside a clear box to protect the circuitry from any water spills and allows viewing of the embedded design. The prototype board was used to build the circuitry, including the power unit for the system so that there could be a 12V and 5V power rail supplied by a 12 DCV wall supply, a ground rail, as well as a 3.3V rail supplied by the SJSUONE's Vout pin. The water supply includes a submersible DC water pump that sits at the bottom of the bucket since it is not self-priming and needs to be completely submerged to avoid damage. The silicon tubing coming out of the bucket is fed to the plant' s soil as a drip system. A single push button was implemented to allow the user to check the parameters at any given time in the day while not allowing them to over-water the plant.		The hardware for the project was broken down by the needs of the different sensors. To have the design function as expected, the team required circuitry to provide the appropriate power to each peripheral as well as the microcontroller. The Basic System Design, shown in the figure below, shows how each component was laid out onto the base board. The LCD, SJSUONE board, and prototype board is set inside a clear box to protect the circuitry from any water spills and allows viewing of the embedded design. The prototype board was used to build the circuitry, including the power unit for the system so that there could be a 12V and 5V power rail supplied by a 12 DCV wall supply, a ground rail, as well as a 3.3V rail supplied by the SJSUONE's Vout pin. The water supply includes a submersible DC water pump that sits at the bottom of the bucket since it is not self-priming and needs to be completely submerged to avoid damage. The silicon tubing coming out of the bucket is fed to the plant' s soil as a drip system. A single push button was implemented to allow the user to check the parameters at any given time in the day while not allowing them to over-water the plant.

−	[[File:~~DIAGRAM~~.jpg\|300px\|thumb\|center\|frame\|Basic System Design]]	+	[[File:CmpE146 S14 BoardSystemDiagram.jpg\|300px\|thumb\|center\|frame\|Basic System Design]]

← Older revision		Revision as of 23:11, 22 May 2014
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−	The Figure below shows the circuit design for our system.	+	The Figure below shows the circuit design for our system. Not shown in the circuit box is the DC motor.

	[[File:CmpE146_S14_BoardSystemSchematic.png\|100px\|thumb\|center\|frame\|Circuit System Set-Up]]		[[File:CmpE146_S14_BoardSystemSchematic.png\|100px\|thumb\|center\|frame\|Circuit System Set-Up]]