Nursery
SHT31 Humidity and Temperature Sensor
Introduction
The SHT31 sensor is one of the most accurate device with truw I2C interface. It has +-2% relative humidity and +-0.3C accuracy. It has two address options and is 3V or 5V compliant. The address being used in this project is 0x45.
November 27th, 2018
Presentation Document SHT 31 (1).pptx
November 20th, 2018
Case Design
Design File
Find my design file in pdf underneath: Pi2CaseX6.pdf
Click here to get the CorelDRAW design files used for the case design.
Budget Update
No new changes in the budget. Budget can be viewed here
Schedule Update
I am on same pace as my decided schedule here
November 13th, 2018
PCB Mounted
PCB Powerup
Power Controller Board is connected to the raspberry pi and all the connections are working efficiently. After running the python script code in loop, accurate readings are being shown.
Budget Update
Budget is still the same as no new parts were required. The project budget can be viewed https://github.com/GifZeb/Nursery/blob/master/budget%20.docx
Schedule Update
The project is going as per schedule. I have started working on my next week requirements which is to have a case designned for my rpi and sensor. I will be using corel draw for the design part. https://github.com/GifZeb/Nursery/blob/master/Schedule.mpp.
Progress Report
After mounting raspberry pi on my sensor, I started working on python code to get the reading from the sensor. There were some problems like import statement not being recognised. I figured out how to fix it when I came to know that every sensor have its own libraries which needed to be installed. sudo pip3 install adafruit-circuitpython-sht31d
Reference: https://learn.adafruit.com/adafruit-sht31-d-temperature-and-humidity-sensor-breakout/python-circuitpython
November 6th, 2018
PCB Soldering
PCB Designing
October 23rd, 2018
PCB Design
Breadboard
Schematic
PCB view:
Budget Update
A Bill of Materials can be exported:
Problems
Major problem I had this week was alignment of the compnents so that in pcb the wires doesn’t cross eachother. VIA solved the whole problem of making underground and on ground connections.
October 23rd, 2018
Breadboarding Milestone
Raspberry Pi is wired with sensor and recongised using i2c command. Pin 3.3V to sensor Vin. Pin GND to sensor GND. Pin SCL to sensor SCK. Pin SDA to sensor SDA. Sensor Vin to sensor ADDR.
Breadboard Wiring
Address
i2c Detection Proof (0x45)
This week I was working on setting up the vnc server. I had lxde operating system on my raspberry pi which being a light version didn’t had many features availble, also it has less interfaces compared to the regular os. Therefore, i switched to remote desktop connection and it worked fine. Also I had a problem while retreving the address. I got 0x44 which was wrong and then after searching a bit i figured out that it has two addresses. To fix it i connected vin to adr and then it worked for me.
October 16th, 2018
Group Pseudo Code Assignment
Helped first year student to write a pseudo code for my third year Capstone Project. Provided a UML diagram.
October 9th, 2018
Reading Week.
October 2nd, 2018
Proof of Purchase
Sensor: SHT31 Sensor and Safety Glasses
Raspberry Pi
September 25th,2018
Project Budget budget .docx
September 18th, 2018
Project Schedule.
Sepetember 11th, 2018
Project proposal finished. Can be viewed underneath. Proposal.xlsx
September 4th, 2018
Repository Created and Sensor Selected
