F18: Wireless sensor network - Revision history

Proj user22: /* References Used */

2018-12-20T05:21:26Z

‎References Used

Proj user22: /* RTC */

2018-12-20T05:19:26Z

‎RTC

Proj user22: /* Master node with LED Matrix */

2018-12-20T05:07:05Z

‎Master node with LED Matrix

Proj user22: /* General Layout for displaying Data on LED Matrix */

2018-12-20T05:02:02Z

‎General Layout for displaying Data on LED Matrix

Proj user22: /* General Layout fro displaying Data on LED Matrix */

2018-12-20T05:00:40Z

‎General Layout fro displaying Data on LED Matrix

Proj user22: /* Nordic Wireless */

2018-12-20T04:57:36Z

‎Nordic Wireless

Proj user22: /* Hardware Design */

2018-12-20T04:54:09Z

‎Hardware Design

Proj user22: /* Design & Implementation */

2018-12-20T04:52:20Z

‎Design & Implementation

Proj user22: /* Abstract */

2018-12-20T04:49:44Z

‎Abstract

Proj user22: /* Wireless Sensor Network */

2018-12-20T04:48:22Z

‎Wireless Sensor Network

@@ Line 753: / Line 753: @@
 *Nordic nRFL2401+ tutorial: http://paulfjujo.free.fr/_NRF2401_Transceiver/datas/nrf24l01_tutorial_0.pdf<br>
 *Building a Wireless Sensor Network with the nRF24L01+(Part 1-6): https://www.youtube.com/watch?v=RrmpN1_Py_4&list=PLufvMUgRha2bHfX1_LReVowCrEeAblzAP<br>
-*MQ-135: https://blog.robberg.net/mq-135-arduino/<br>
+*MQ-135:
-*MQ-135: https://hackaday.io/project/3475-sniffing-trinket/log/12363-mq135-arduino-library<br>
+**https://blog.robberg.net/mq-135-arduino/<br>
-*MQ-135: https://www.engineeringtoolbox.com/co2-comfort-level-d_1024.html<br>
+**https://hackaday.io/project/3475-sniffing-trinket/log/12363-mq135-arduino-library<br>

@@ Line 732: / Line 732: @@
 === RTC ===
-Time just kept resetting on board reset, even after setting the time. We figured out a bug in implementation, where we had to store some value in "day of year" register to satisfy the if condition that goes to default if of register does shows any value.
+Time just kept resetting on board reset, even after setting the time. We figured out we had to store some value in "day of year" register to satisfy the if condition that goes to default if DOY register isn't within the acceptable range. Additionally, the terminal task did not support entering a DOY parameter, therefore the time command handler had to be updated to accept the input.
 == Conclusion ==

@@ Line 582: / Line 582: @@
                  delay_us(ON_time);
+             }
+The image below shows a logic analyzer capture of the display of one row of the matrix.
 ==== SwitcherTask: ====
 Its has a medium priority and it will cycle between four screens for about 2 seconds for each screen thereby blocking this task for 2 seconds. We have 2 pointers top and bottom that will fetch the layout from the lookup table and based on the value of the switcher variable it will update layout that it has to display. If the value of the switcher variable is 1, top and bottom will fetch temperature and humidity layout for the top and the bottom portion of LED Matrix respectively.
@@ Line 588: / Line 591: @@
 ==== Matrix_Value_Update_Task ====
 Here we have a matrix_value_update function that will parse the sensor values received from the nodes using value_extractor function and assign it to a values struct object which has a 0-9 value for the struct members units, tens and hundreds. These values are then passed to a lookup_switch function which will lookup a matrix of 5x3 that matches the 0-9 digit value and assign it to a pointer. The data indicated by the pointer will overwrite the general layout for each sensor value thereby updating the sensor values on the LED Matrix. The same will follow when we update the node number for screen 1 and screen 2. The switching between the nodes has been implemented in this task. We scan the switches and based on which switch is pressed we display the respective sensor values.
 ====Datalogging Task====

@@ Line 553: / Line 553: @@
 |}
-It’s the layout of how the display would look for all the screens. We made use of a lookup table for units, tens and hundreds positions to update the sensor value on the led matrix. For the LED matrix control signals, as mentioned above in the hardware part, we are making use of SJOne board's 12 GPIO pins.
+It’s the layout of how the display would look for all the screens. We made use of a lookup table for units, tens and hundreds positions to update the sensor value on the led matrix. For the LED matrix control signals, as mentioned above in the hardware part, we are making use of 12 of the SJOne board's GPIO pins.
 ==== MatrixTask: ====

@@ Line 517: / Line 517: @@
 === Master node with LED Matrix===
 [[File:Master.jpeg|750px|thumb|center|Master node with LED Matrix]]
-==== General Layout fro displaying Data on LED Matrix====
+==== General Layout for displaying Data on LED Matrix====
 We basically made a bit pattern on the matrix for the 4 screens and each of them displays:

@@ Line 487: / Line 487: @@
 [[File:350px-Wireless_Chip_Interface.png|300px|thumb|right|Nordic SPI Hardware Interface]]
-The Nordic nRF24L01+ wireless sensor is a highly integrated, ultra low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. The nRF24L01+ is designed for operation in the frequency band of 2.400 - 2.483GHz. The high air data rate combined with two power saving modes make the nRF24L01+ very suitable for ultra-low power designs. This chip is interfaced with LPC1758 microcontroller of SJOne Board using SPI pins (MOSI, MISO, CLK, CS).  It is the on-board chip in SJOne Board, so no breakout board connections are required for this project. We had to attach a RP-SMA Adapter as well as antenna to communicate between the multiple nodes and the master board.
+The Nordic nRF24L01+ wireless sensor is a highly integrated, ultra low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. The nRF24L01+ is designed for operation in the frequency band of 2.400 - 2.483GHz. The high air data rate combined with two power saving modes make the nRF24L01+ very suitable for ultra-low power designs. This chip is interfaced with LPC1758 microcontroller of SJOne Board using SPI pins (MOSI, MISO, CLK, CS).  It is an on-board chip on the SJOne Board, so no breakout board connections are required for this project. We had to attach an RP-SMA Adapter as well as antenna to communicate between the multiple nodes and the master board.
 === Sensors ===

@@ Line 433: / Line 433: @@
 === Hardware Design ===
-The project is based around the SJ one board, which uses an LPC1758 Arm Core M3 microcontroller. The system design consists of two main devices: a wireless master with a display and a wireless sensor node (of which there are several).
+The project is based around the SJ one board, which uses an LPC1758 Arm Cortex M3 microcontroller. The system design consists of two main devices: a wireless master with a display and a wireless sensor node (of which there are several).
 ==== Wireless Master ====

@@ Line 430: / Line 430: @@
 == Design & Implementation ==
 [[File:Wsn.jpg|570px|thumb|center|Wireless Sensor Network]]
-The design section can go over your hardware and software design.  Organize this section using sub-sections that go over your design and implementation.
 === Hardware Design ===

@@ Line 6: / Line 6: @@
 == Abstract ==
-A wireless sensor network (WSN) consists of collection of sensor nodes. Each individual node consists of MCU with on-board sensors and Nordic wireless for communication, which are distributed to monitor physical or environmental conditions, such as temperature, ambient light, humidity, air pressure and air quality. The SJ-One board contains an onboard light intensity sensor, and a custom PCB for the project has a combined Temperature, Pressure, and Humidity sensor and an air quality sensor. These sensor data are transmitted to a network coordinator which is controls the wireless network. The coordinator board collates the data from all nodes, and displays it on a 16x32 LED matrix.
+A wireless sensor network (WSN) consists of collection of sensor nodes. Each individual node consists of MCU with on-board sensors and Nordic wireless for communication, which are distributed to monitor physical or environmental conditions, such as temperature, ambient light, humidity, air pressure and air quality. The SJ-One board contains an onboard light intensity sensor, and a custom PCB for the project has a combined Temperature, Pressure, and Humidity sensor and an air quality sensor. These sensor data are transmitted to a network coordinator which controls the wireless network. The coordinator board collates the data from all nodes, and displays it on a 16x32 LED matrix.
 == Objectives & Introduction ==

@@ Line 2: / Line 2: @@
 [[File:SensorNetwork MasterAssy front.jpeg|900px|thumb|center]]
-Wireless Sensor Networks project displays data received from various nodes on a 16*32 LED Matrix which is connected with the Master node (SJOne Board).<br>
+Wireless Sensor Network project displays data received from various nodes on a 16*32 LED Matrix which is connected with the Master node (SJOne Board).<br>
-Each node measures various environmental parameters from it's surrounding and send those data to master in form of packets.
+Each node measures various environmental parameters from its surrounding and send those data to master in form of packets.
 == Abstract ==