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Transcript of CDR
Requirements: We have followed Sentilo's specifications in order to build the API. For now, the preliminary goal is accomplished.
The following weeks we will be working on more features for the download, like getting the mean and other statistical results.
Rechargeable batteries and solar panel.
Direct supply from 220 V converted to 3.3 V.
Power supply from 12/24V converted to 3.3 V.
The market offers a variety of smart wireless modules able to integrate Wi-Fi into their network connected devices, but not all offer an
SDK still in development
Cost + 50% over EC32L module
Same specifications as EC32L
Similar EC32L price
Similar E32L specifications
Really limited flash memory
RTX 4140 suitable, but not release
Really expensive SDK
Best ultra low power smart wireless modules:
The robust main module contains the wireless smart
module, based on an
consumption. Some of the features offered are as follows:
range: 3 - 3.6 V
bus interfaces able to operate in multi-master and slave modes.
able to communicate in slave and master modes in full-duplex and simplex communication modes.
interface that can be operated in master or slave mode, and used for connecting digital audio devices together.
device peripheral embedded, compatible with the USB full-speed 12 Mbit/s.
and serial wire debug port that enables either a serial wire debug or a JTAG probe to be connected to the target.
As our product can be modulated up to
, for the sensoric modules we decided to use I2C sensors, because this protocol allows to connect up to 127 nodes via a bus that only requires
two data wires
, known as SDA and SCL.
These five sensors are:
Temperature and Humidity sensor:
Electret custom envelope detector + I2S Streaming Mic
Depending on the application
150KB. RAM 30KB (Upgradeable 400KB).
: built-in ceramic antenna (300m direct sight range). External optional.
Data collection through
I2C bus and ADC Input
External NTP Server
Every sensor has its own
Shared memory management
Data storage to reduce latency, lowering power consumption. Protection against network failures.
Data processing and storage
WiSmart EC32L13 Capabilities
The platform we are developing is a ST Microelectronics STM32F103
The main CPU is a 32-bit ARM Cortex M3 @ 72 MHz
30 KB RAM
The SDK supports both C and C++ (and of course Assembly) as programming languages.
The board is running a minimalist OS called ChibiOS, which enables OS-dependant features like multithreading, network sockets and such.
It features four USART's, one of them is already connected to a DB9 header, which permits debugging.
Debugging with a gdb server and flashing is possible using JTAG
Easily integrates with other STM32F10x projects
WiSmart EC32L13 Limitations
Lack of a common sensor interfacing method
Lack of dynamic (runtime) linking and low space for binary
Lack of user input to configure wireless connectivity
Strict power consumption requirements
User : http://www.modularsense.com/data/modulardownload/ID_7888?limit=2&from=10/01/2013&to=11/01/2013
I2C frame capture of MPL115A2 Sensor
Sensors Power Control
Audio Sensor envelope
Barcelona’s city council.
Big investments -> one of the 5 european Smarticities.
Appointment on Thursday. Explain our product. Fits their SmartCities projects.
Interest in sharing resources. Fits in with our idea of an Open Data platform.
Placing the product in Guifi infrastructure
Use the Guifi server to sep up the Open Data platform
-PHP->Wordpress template modified (pluggins, corporative)
-Logic gates 0,5 -Humidity and temperature 0,0134
-Board 0,10 -Pressure 1,377
-Box 0,30 -Light 0,575
-Bus 0,5 -Sound 2,531
-Final assembling 0,10
-Final assembling 0,10
-Solar Panel 8
-Final assembling 0,10
-Converter 220V a 3,3V 15
-Converter 24V a 3,3V 1,5
Three ways to manage power supply: