BMP280 based Arduino

yutarour.md

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+---
+name: "@yutarour"
+project: "Resin Printed Weather Proof Arduino Temperature Logger Case"
+---
+
+# Resin Printed Weather Proof Arduino Temperature Logger Case
+
+## Summary
+
+I am going to build a enclosure for a BMP280 based arduino temperature, humidity and pressure logger. Since resin is waterproof, it can be used for outdoor applications. 
+I will be making a model of the enclosure in fusion 360 and printing it with a resin printer.
+
+## Plan
+
+1. Acquire all of the materials: 
+  - Resin printer
+  - Arduino Uno -Already have at home
+  - BMP280 -Already have at home
+  - Resin -Will buy with own money to avoid overbudget
+  - Female to Male wires -Already have at home
+  - Isopropyl alchohol - Already have at home
+  - Resin wash and cure machine
+  - 9V battery for arduino -Already have at home
+2. In Fusion 360, design a case that fits all of the components in.
+  - About 9x9x3 (LxWxH)
+  - Should have mounting screws on it
+3. Using the slicing software that comes with the printer, slice the model
+4. Assemble the printer according to the instructions that come with the printer
+5. Load the model onto a MicroSD card and put into printer and press print
+6. Remove the model from the print bed
+7. dunk in isopropyl alchohol for 15 minutes
+8. To cure the resin, place under UV light for 15 minutes
+9. Assemble the electrical circuit
+  - BMP280 is a I2C enabled device; therefore SCL, SDA, VCC, GND are the pins that are required to be connected
+  - Connect the SCL pin to analog pin 5 and SDA to analog pin 4. 
+  - Connect VCC to arduino 5V (the BM280 has a voltage regulator)
+  - Connect GND to arduino GND
+10. Write The code
+  - All data will be stored in EEPROM or in a micro SD card (TBD)
+  - The BMP280 is on I2C address 0x76
+  - CSV file format will be used to log data since it is the simplest and compatible with most systems.
+  - The time will be logged as minutes away from start time using the arduino millis() function. 
+    - In order to avoid overflow of the long which stores millis() a if statement will exist that will reset the variable. 
+    - The data will not be deleted since the microSD card is non volatile. 
+11. Assemble the entire thing
+  - Put the electronics in the housing
+  - Close housing
+12. Testing
+  - Place the box outside in preferably rain or snow for 24 hours and see if it breaks
+  - If it is alive after 24 hours, extract the data and use python matplotlib to graph the temperature change over time
+13. Done
+
+## Budget
+
+| Product                   | Supplier/Link                         | Cost   |
+| ------------------------- | ------------------------------------- | ------ |
+| Voxelab Proxima 6.0       | https://a.co/d/2MQH0pi                | $119.00|
+| ELEGOO Mercury 2 in 1 Washing and curing machine     | https://a.co/d/60ervD3                | $111.99|
+| Arduino Uno               | Already Own                           | $0.00  |
+| BMP280 sensor             | Already Own                           | $0.00  |
+| Isopropyl Alchohol        | Already Own                           | $0.00  |
+| 9V battery                | Already Own                           | $0.00  |
+| Female to Male wires      | Already Own                           | $0.00  |
+| Translucent Resin         | Will purchase with own money          | $17.99 |
+| Tax (6.5%)                 |                                       | $15.01|
+| Shipping                  |Free with Amazon Prime                 | $0.00  |
+| Total                     |                                       | $246.00|