easyPIRmultisensorsBox Code

Coincell powered PIR sensor. Based on the Atmel ATMega328P 8MH) microcontroller with RFM 69 CW or Nordic Semiconductor’s NRF 24L01+ radio on board

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File	Date	Author	Commit
pdf	2019-04-12	Y	[1f09ed] Schematic
pics	2018-09-14	Y	[a57753] Add files via upload
.gitattributes	2018-05-27	yurysvirida	[b76750] :octocat: Added .gitattributes & .gitignore files
.gitignore	2018-05-27	yurysvirida	[b76750] :octocat: Added .gitattributes & .gitignore files
DomoticzInstallMySensors.md	2018-05-27	Y	[924ef7] Add files via upload
README.md	2018-07-10	Y	[fda601] Update README.md
SecurityPersonalizationHowTo.md	2018-05-27	Y	[924ef7] Add files via upload
easyPIRmultisensorsBox.ino	2018-10-25	Y	[2e031f] _flash.initialize(); moved inside Loop(), no...
easyPIRmultisensorsBoxWithTempHumSensor.ino	2018-10-25	Y	[508b65] _flash.initialize(); moved inside Loop(), no...

Read Me

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The easyPIRmultisensorsBox is a low cost wireless Arduino IDE compatible (the Atmel ATMega328P 8MHz) microcontroller with RFM 69 CW or Nordic Semiconductor’s NRF 24L01+ radio on board and few other nice additions.

Best sutable for Home Automation, IOT. You may think of it as Arduino Pro Mini plus all the items in the picture below:

Specification:

MCU Atmel ATMega328P 8MHz) microcontroller
Radios- HopeRF RFM 69 CW (915, 868 0r 433 MHz) or Nordic Semiconductor NRF 24L01+ radio on board
Enclosure dimensions 46mm x 36mm x 18mm
Powered by two CR2032 batteries in series with high-efficiency power converter (3.5-10V). JST connector for external battery.
Wide operating temperature range. Tested -20 +40 Celsius
PIR sensor S16-L201D
Temperature and humidity sensor Si7021
High Accuracy Temperature Sensor ±0.4 °C (max), –10 to 85 °C
Precision Relative Humidity Sensor ± 3% RH (max), 0–80% RH
Light sensor BH1750, spectral responsibility is approximately human eye response.
Authentication security - Atmel ATSHA204A Crypto Authentication Chip
External JDEC EPROM
Dualoptiboot bootloader. Implements over the air (OTA) firmware update ability
Multiradio board. Rfm69cw and nrf24l01+ are supported.
FTDI header for programming
Reverse polarity protection.
Board dimensions 31mm x 41mm.

Arduino IDE Settings

Arduino IDE Settings

programming FTDI adapter connection

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How to use it as home automation (IOT) node controller

easyPIRmultisensorsBox.ino is the Arduino example sketch using MySensors API.

Controller Setup.
Burn the easyPIRmultisensorsBox.ino sketch into the board and it will became one of the MySensors home automation network Sensor's Node reporting Motion (PIR), Temperature , Humidity and Vsial light in Luxes to a smart-home controller.
To create the home automation network you need smart-home controller and at least two Nodes one as a Sensor node and the other one as the “Gateway Serial” connected to a smart-home controller. I personally love Domoticz as a smarthome controller. Please check this HowTo to install Domoticz.
No Controller setup.
However, for no-controller setup, as example, you can use 3 nodes - first node as the “Gateway Serial”, second node as a Relay and last one as a PIR sensor for that a Relay. No controller needed then, keep the Switch and the Relay on the same address and the switch will operate the relay.

Things worth mentioning about the MySensors Arduino sketch:

Code	Description
Light meter BH1750 Library by Christopher Laws	MySensorsArduinoExamples BH1750
Temperature and humidity sensor Si7021 SparkFun Library	SparkFun_Si7021_Breakout_Library
#define MY_RADIO_RFM69 #define MY_RFM69_FREQUENCY RF69_433MHZ	The easyPIRmultisensorsBox can use Hope RF RFM69CW or Nordic Semiconductor's NRF 24L01+ radios. Define which radio we use – here is RFM 69 with frequency 433 MHZ and it is HW type – one of the most powerful RFM 69 radios.
#define MY_RADIO_NRF24	Define which radio we use – here is Nordic Semiconductor's NRF 24L01+
#define MY_NODE_ID 0xE0	Define Node address (0xE0 here). I prefer to use static addresses and in Hexadecimal since it is easier to identify the node address in Domoticz devices list after it will be discovered by controller ( Domoticz). However, you can use AUTO instead of the hardcoded number (like 0xE0) though. Domoticz will automatically assign node ID then.
#define MY_OTA_FIRMWARE_FEATURE #define MY_OTA_FLASH_JDECID 0x0	Define OTA feature. OTA stands for “Over The Air firmware updates”. If your node does not utilize Sleep mode you can send new “firmware” (compiled sketch binary) by air. Here is the link on how to do it. Skip to the step "How to upload a new sketch just with OTA" as all initial steps have been completed in the easyPIRmultisensorsBox. For OTA we use JDEC Flash chip where the node stores new firmware and once it has been received and checksum (CRC) is correct it reboots and flashes your new code into the node controller. 0x2020 "Erase type" defined here for JDEC Flash chip .
#define MY_SIGNING_ATSHA204 #define MY_SIGNING_REQUEST_SIGNATURES	Define if you like to use Crypto Authentication to secure your nodes from intruders or interference. After that, you have to “personalize” all the nodes, which have those, defines enabled. How to “personalize” nodes with encryption key. You need both defines in the nodes you need to protect. The Gateway Serial could be with only one of those defines enabled - #define MY_SIGNING_ATSHA204