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--- tutorials:it:microcontroller_environmental_sensor [2019/02/24 19:37] – created information about microntroller sensor system and implementation srmes
+++ tutorials:it:microcontroller_environmental_sensor [2019/02/25 13:29] (current) – srmes
@@ Line 1: / Line 1: @@
+====== Microcontroller Environmental Sensor System  ======
 In the interest of storing analytical data about environmental stimuli in and around the buildings at Kuckucksmuehle, an environmental sensor system has been created.
 The sensor system measures:
-  - temperature
+  - **temperature**
-  - humidity
+  - **humidity**
-  - light level
+  - **light level**
-And subsequently can send this data via wireless network connection to central data store.
+The system can subsequently can send this data via wireless network connection to central data store.
-The implementation of this micro controller system uses the following technologies:
+====Implementation====
   * A light-dependent resistor (LDR) to track changes in light level in the immediate environment of the sensor
   * A DHT11 sensor to gather both temperature and humidity readings from the immediate environment of the sensor
@@ Line 16: / Line 19: @@
 In terms of software the program operating chip is C++ adapted from a previous project published by Ben Picco: [[https://github.com/benpicco/blinkendisplay|BlinkenDisplay]]. The software uses gcc 'make' functionalities to compile and flash the chip.
+====Schematic====
+A schematic which is representative of the system including the microcontroller is shown here:
+{{ :tutorials:it:environmental_sensor_schem.jpg?direct&400 |}}
+====Setting up the system for the first time====
+  - Ensure that you have all necessary componentry as detailed by the schematic above:
+     * Wires
+     * NodeMCU v2 module
+     * Light-dependent-resistor
+     * DHT11 module
+     * 2x 10kΩ resistors
+     * 1x USB cable (MicroUSB v2 --> USB type A)
+  - Arrange the components on a breadboard as per the schematic
+  - Clone repoitory [[https://github.com/ScottA38/HAB_sensor/|External Link]]
+  - **Important:** enter the cloned repository and open 'DHT_Unified_Sensor.ino'. Find the field which starts '#define HOST' and change the variable's value to the *IP address of your current computer* (if debugging/testing) or the *IP address of an appropriate server* (if putting it into production)
+  - Connect the usb cable between your workstation and the NodeMCU v2 module
+  - Open a terminal (Operating System dependent) and run './prepare.sh' in the cloned directory. Ensure there are no failures reported
+  - Run 'make' to ensure all files compile correcttly. Ensure there are no failures.
+  - Run 'make upload' to flash the NodeMCU v2 device with the program
+====Testing/debugging====
+If you have completed step 4 by entering the IP address of your computer into the **.ino** script, then the following steps apply.
+  - Ensure that the USB cable is connected to the ESP chip such that it has power
+  - Within the terminal of your current computer run 'nc -l -p 1337 -u' to monitor and print out incoming packets going to a specific port over LAN and print them out to screen on the terminal. **N.B:** you must specify the '-u' flag (UDP flag) otherwise no network traffic will be received from the ESP chip. Ensure there are readings for all 3 environmental stimuli (temperature, humidity, light)