What does Logger do? The Logger is a stand alone device that reads sensors and stores the data. The Logger captures 128 bytes of data on up to 100 sensors every few seconds. The data is stored on an SD card and kept permanently. About 40 years of data taken once every five seconds fit on a 64Gb card.
The Logger is a 'last mile' Internet of Things sensor system. It captures sensor data from sensors and logs the sensor history permanently in local memory. The Logger is a Web Server allowing direct obseration of the data that has been logged. The Logger can also control output pins. The Logger then reports to standard cloud based Internet of Things services uplinking the sensor data to the cloud.
The Logger was motivated by prior work monitoring environmental parameters using Mesh Networks at Wireless Sensors and by consumption/production monitoring systems like Solar Log. Another seed was the availability of the extreemly low cost WiFi enabled processor the ESP8266. Logger provides a more complete set of tools and hits a dramatically lower price point than our prior efforts. The cost will certainly be less than $50, possibly quite a bit less. Logger also has a more open software strategy suited to customer enhancements.
This is a web page directly from the Logger device showing a temperature
Sensor solutions are often missing the data history capture found in the energy monitors. Without sensor history many control problems are difficult or impossible, for example controlling a furnace from a thermostat is much easier with a few minutes of history to make sure the furnace is not turned on and off too frequently.
Logger seeks to combine sensing, actuation, and usage monitoring on a single platform and to meld those with long term history logging. Often missing in prior solutions is long term data capture (so history is not lost), actuation of outputs, integration of a large variety of sensors in a single device and a more general purpose software and sensor strategy. The display of the data is often not available at the point of data collection nor in real time.
Logger is a slow sample rate data logger and controller for multiple sensors. The long term goal is to provide a complete 'last mile' software system that connects the world of inexpensive embedded system I/O devices (i.e. I2C, SPI and OneWire) to the Internet of Things middleware solutions that are starting to become available. (i.e. Amazon AWS IOT and AT&T's M2X)
Logger already has a basic integration to
AT&T's M2X service
which allows sensor data to be posted to the cloud. Uplinks of a
number of sensors every minute can be handled. A desktop
engineering board is
temperature to the
cloud (it is an engineering system so it
is not up all the time...)
Logger offers a developers kit that uses a plug and play philosophy for sensors. A variety of simple inexpensive sensor modules are plugged in to a processor module to configure a data logging node targeted at a specific purpose.
The Logger acts as a web server, the data collected is displayed on web pages hosted by the logger itself. This data is also available as XML making it available in machine readable form to computers on the internet.
Use Case: Temperature Alerts
The Logger keeps track of temperature over time. The base level processor module is capable of reporting temperature history to AT&T's M2X service which can send email alerts if the temperature is outside of a specified range.
Use Case: Temperature Tracking
Keep track of temperature over time. The history is a permanent record that can be used to make sure refrigeration is consistant or to watch a heating system. Track many locations and compare them. Report them to the cloud and combine many devices at different locations.
Use Case: Electric Consumption/Production
Combined with current monitoring equipment like a Wattnode Pulse the Logger can watch electric consumption and/or Solar production. The Logger plots graphs of usage over time on web pages. This is live data watching energy consumption at our facility. We recommend choosing "Pulse_0" and asking for 144 columns. Then click the "DAY" button to see the energy consumption every 10 minutes. This system is an engineering system so it is not up all the time.
Use Case: Water Consumption
Connect a water meter to the Logger and the strategies used for electric consumption can monitor water consumption. Detecting a leaking toilet is no more than looking to see if there are intervals with no flow.
Use Case: Controlled Environment
Medical supplies and foodstuffs have to be kept in controlled environments. Having a log of the environmental history can be critical to determining if the items are safe to use.
Use Case: Animal Cage
Research labs keep animals in carefully controlled environments. Typical research projects require knowlege that the environment was properly controlled throughout the experiment. The Logger can also be used to turn experimental systems on and off.
Use Case: Sensor Manufacturer
The maker of an embedded sensor typically makes a demonstration module to allow prospective users to experiment with the sensor and to see if the data measured suits their needs. Logger allows a Sensor Manufacturer to build a trivial (wires only) adapter module and plug that into a Logger processor module. The same processor module can be used for all sensors made by that manufacturer.
The Processor Module contains an ESP8266 WiFi processor and an SD card slot. NOTE: the Cat-5 connectors are simple wiring between modules (not internet). The Processor Module is a WiFi Server hosting web pages that display the sample history. It also is a network client for tasks like automatic time setting and uplinking sensor data. Further it is an Access Point (like a WiFi router) to make it easy to configure. Built in to the processor module are a 0 to 1 volt ADC sensor and a temperature sensor.
I/O Expander Module
Using the I/O Expander Module Logger is capable of counting pulses on a subset of the digital inputs. For each such input the total pulses observed to date are logged every second. To calculate usage for an interval read the count at a start time and the count at an end time and subtract. Graphs of usage are available as web pages.
The Humidity Module captures relative humidity and temperature every sample. Logger supports one Humidity Module.
AC Power Module
Developers Kit I/O Module
Key LOGGER Goals
These are the basic ideas that motivate this project.
Logger Work Log for Michael Newman. Send comments and corrections to:|