tino's Introduction

TiNo

"TIny NOde": battery powered wireless sensor or wireless actor. Target of the project is the development of small size , cost effective battery powered wireless sensors. The sensors communicate with gateways, like a raspberry pi. The targets are:

low cost (BOM under 5 Euro, as of 2020)
very small size (matchbox)
ultra low sleep current
long battery life time: 5 years and more on a CR2032 cell
long range (what ever this means :-), but its realy long)
simple to build up
communication security
Plug&Play Firmware

Sensors can be almost any, like temperature, relative humidity, air pressure, altitude meter, light intensity, UV Index, movement detectors, Reed switches, etc. However sensors have to be specified to work down to 2.2V. Otherwise the charge of the battery can not be fully used.

PCBs fit into low cost PVC boxes with the size of a matchbox that are readily available on the market.

Features

General

Voltage from ca. 1.8V to 3.6V
Operates with a CR2032 cell up to 5 years
various PCBs fitting into selected PVC boxes

Sensors

HTU21D
SHT21, SHT20, SHT25
SHT30, SHT31, SHT35
BME280 (air pressure sensor)
DS18B20 (ubiquitous temperature sensor)
MAX31865 (PT100 temperature Sensor)
AM312 (PIR movement sensor)
I2C Bus based sensors can easily be integrated
4 digital GPIOs
up to 4 analog GPIO's (dependent on hardware)

Radio

RFM69CW, RFM69HCW, RFM95 Module
bidirectional communication
ISM Band (Europe: 433MHz / 868MHz, US:315MHz / 915Mhz)
2GFSK Modulation
Center frequency adjustable
Frequency correction can be calibrated
Transmit power from -18 dBm to 20dBm, 10 dBm typ.
Link budget up to 120dB
sensitivity -105 dBm typ.
range t.b.d., but its looong!
RF communication encrypted
FEC (Forward Error Correction)
Interleaver

Baseband

Atmel (Microchip) ATMega328p-au
32kByte Flash
sleep current < 2µA mit external crystal 32.768kHz
sleep current ca. 4µA with internal RC oscillator
1 MHz clock allows operating voltage down to 1.8V
8 MHz clock for gateway receiver
I2C bus
min 4 additional GPIO
CPU can be locked to avoid reading the flash code

System / Software

Open Source Software C++
Software can easily be adopted individually
Programming tool is Arduino IDE
Configuration of Nodes via serial interface (FTDI Adapter)
configuration data and calibration data reside in EEPROM
EEPROM encrypted
Flashing
- using ISP Adapter or
- serial with FTDI Adapter and Bootloader
up to 4 external interrupts (i.e. push buttons) can be configured

tino's People

Contributors

Stargazers

Watchers

tino's Issues

No EEPROM default storage

by default, EEPROM is not filled up with reasonable, default data. Nodes need to be configured through the configuration program.
solution: fill up EEPROM at very first use with defaults, possibly during flashing using avrdude.
(ex.: batchfile invoking avrdude, copying data into EEPROM after flashing)

nurazur / tino Goto Github PK