====== Data Collection Node Hardware ======

Monitoring of power outages will require battery backed power.

===== Requirements =====

Requirements for the data collection node hardware:

  * Wall power (no battery needed)
  * Low cost
  * WiFi capable comms to the gateway
  * Single board with features to support all sensors
  * No OS to manage

===== Controller Hardware Evaluation =====

The following boards are candidates for data collection node hardware:

^ Board ^ Cost ^ RAM ^ Flash ^ Net ^ IO ^ Notes ^
| [[https://www.sparkfun.com/products/18288|Sparkfun Pro Micro RP2040]] | $10.95 | 264k | 16MB | 802.11 | USB-C (host/device) \\ QWICC \\ 4x12ADC \\ 30 GPIO \\ I2C \\ SPI \\ 2xUART \\ | MicroPython, C/C++ |
| [[https://www.sparkfun.com/products/13231|Sparkfun ESP8266 Thing]] | $18.50 | 32k inst/80k data | 4MB | 802.11 pnp | micro USB \\ 32 GPIO \\ I2C \\ SPI \\ UART \\ |  Arduino IDE |
| [[https://www.sparkfun.com/products/13907|Sparkfun ESP32 Thing]] | $23.50 | 520k | 4MB | 802.11 | micro USB \\ 28 GPIO \\ I2C \\ SPI \\ UART \\ | Arduino IDE |
| [[https://www.sparkfun.com/products/20173|Raspberry Pi Pico W]] | $6.00 | 256k | 2MB | 802.11g | micro USB (host+dev) \\ 26 GPIO \\ 2 SPI \\ 2 I2C \\ 2 UART \\ 3x12 ADC | RPI Linux |
| [[https://www.sparkfun.com/products/18713|Raspberry Pi Zero 2 W]] | $15.00 | 512MB | 4MB | 802.11 b/g/n | micro USB \\ mini HDMI \\ GPIO \\ I2C \\ SPI \\ UART | RPI Linux |
| [[https://www.sparkfun.com/products/19696|Sparkfun Thing Plus DA16200]] | $34.95 |  | 512MB | 802.11 b/g/n | USB-C \\ QUIC \\ 16 GPIO \\ I2C \\ SPI \\ 2 UART \\ 12 bit ADC |  |

===== Sensors =====

==== Air Flow Sensor ====

This sensor is used to monitor air flow in HVAC ducts.

Part: [[https://www.sparkfun.com/products/18377?_ga=2.49502561.699155336.1668005513-765672591.1668005513|SparkFun Air Velocity Sensor Breakout - FS3000-1005 (Qwiic)]]
  * $59.95
  * QUICC
  * Arduino library
  * 0-16mph, 12-bit resolution
==== Current Measurement ====

This sensor is used to measure device usage (like an EV charger) and also to detect when a device is running (HVAC unit).

Requirements
  * Non-intrusive
  * 120v, 240v

^ Device ^ Cost ^ Max Current ^ Notes ^
| [[https://www.digikey.com/en/products/detail/carlo-gavazzi-inc/CTV1X60A333MV/15290124| Digikey Current sense transformer CTV1X60A333MV]] | $56.00 | 60A | snap on, no lead |
| [[https://www.sparkfun.com/products/11005 | Sparkfun Non-Invasive Current Sensor - 30A]] | $10.95 | 30A | snap on, lead with 3.5mm audio connector |

==== Water Temperature Sensor ====

This sensor is intended to measure temperate of a pool.

Requirements
  * Submersible
  * I2C

[[https://www.sparkfun.com/products/11050|Temperature Sensor - Waterproof (DS18B20)]]

$10.95

1-wire interface

==== Ambient Temperature/Humidity Sensor ====

Used to monitor ambient temperature and humidity, especially in HVAC vents to help monitor HVAC health.

Component: [[https://www.sparkfun.com/products/16298|Qwiic Pressure/Humidity/Temp (PHT) Sensor - MS8607]]
  * $19.95
  * QUICC
  * Arduino library
  * +/- 1degC
  * Pressure, temperature, humidity