1. Remote Sensor Interface for IoT
Martin Hutchins
Nicholas O’Dell
Joe Cooper

2. Deliverables Simple interface for digital, analog, SPI, and I2C I/O
Remote access and control
Solar power with battery
Dual platform:
Raspberry Pi – More capabilities but with more overhead and cost
AVR – Fewer capabilities but cheaper and more plug- and-play

3. Scope
Our project goal is to deliver a simple device which can be used to send and receive data remotely to and from any number of devices and sensors. This device will serve as a point in the “Internet of Things.” That is, a sensor could be connected to the device, and the data from that sensor could be read remotely. Likewise, our device could be used to remotely send signals to another connected device.

4. Iot device list Raspberry Pi zero Arduino AVR Atmega328 ATTINY85 PICs
PIC 18F2550

5. Raspberry Pi Zero Cost = $5 A Broadcom BCM2835 application processor
1GHz ARM11 core (40% faster than Raspberry Pi 1)
512MB of LPDDR2 SDRAM
A micro-SD card slot
A mini-HDMI socket for 1080p60 video output
Micro-USB sockets for data and power
An unpopulated 40-pin GPIO header
Identical pinout to Model A+/B+/2B

7. Arduino AVR ATtiny85 cost about $0.99 Uses Arduino for the programmer
(which makes this a more likely choice because the IDE is free and available anywhere)
But less capabilities than the Pi Zero
Ex. We would need more hardware for this meaning an Arduino to start ($30) and lack of pins

9. ATMEGA328
High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family
Two Master/Slave SPI Serial Interface
23 Programmable I/O Lines
Cost between $3 & $6

11. PICs More built-in capability PIC 18F2550 WiFi, Bluetooth, etc.
Comparable to ATMega 328

12. PIC vs. AVR AVR: Cheaper development Programmable via Arduino
USI to emulate I2C/SPI
More online support
PIC:
More costly development software/hardware
More capability

13. Outline Get RPi working with SPI, ADC, I2C Output data to webpage
Transfer to RPi Zero
Get Arduino working with SPI, I2C, IR
Transfer to AVR
Circuit design
Integrate solar panel with back-up battery