Code and documentation for Junior-IOT-in-a-box where you can build your own diy sensoring with TTN Lorawan based on Lora32u4
This software has been created for edicational reasons. Any commercial usage will need prior agreement with author(s) and compensation for costs and effords. For any commercial project, consider using non-diy hardware such as the Sodaq One. Your commercial project will benefit from the extensive research and licensing steps as done for such products.
Credits:
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I2C things:
Groove ==> SCL SDA V GND
GY-91 ==> Vin GND SCL SDA
HMC5983 ==> Vin GND SCL SDA
GY-BMEP 280 ==> Vin GND SCL SDA
¦ ¦ ¦ ¦
red blk whi yel
brn blk whi gra
¦ ¦ ¦ ¦
GPS BN-180/BN-200/BN-220 ==> (batt) VCC RX TX GND ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
+---------+ red gre whi blk ¦ ¦ ¦ ¦
¦ LiPo ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ 380 mAh ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦protected¦ ¦ ¦ ¦ ¦ ¦ ¦
+---------+ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ tx¦ rx¦ Vbat/2¦ ¦ ¦I2c¦
+--------¦--¦--- ---+---X---+---X---X---+---+---+---X---X---+---+-------+
¦ - + BAT EN 5V 13 12 11 10 9 6 5 3 2 ¦
¦ (LIPO CONN) USB LED A11 A10 A9 A7 SCL SDA ¦
¦ +------+ +----------------+ DIO3 R
¦(USB CONN) LORA32U4 ¦ATMEGA¦ ¦ RFM95 / HDP13 ¦ DIO2 R
¦ ¦ 32U4 ¦ ¦4=rst 7=irq 8=cs¦ ¦
¦ (RST BTN) +------+ +----------------+ ant(0)-
¦ 18 19 20 21 22 23 15 16 14 RX TX ¦
¦ RST 3V3 REF GND A0 A1 A2 A3 A4 A5 SCK MOSI MISO 0 1 DIO1 ANT +
+---+--=+===+===+===+=--+---+---X---X---X---R---R---R---+---+---R-------+
¦ GND ¦ ¦ ¦ ¦ ¦ ¦ xxx xxx xxx rx tx
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ SPI-RFM95 serial1
... ... ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
GND out ¦ ¦ ¦ ¦ ¦ ¦ ¦
pushBtn ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦
red gre whi ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
TEMT6000 ==> VCC GND OUT ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦
blk whi gra pur zzz ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦
LeoEQ7 ==> gnd res pul out mic ¦ ¦
¦ ¦ ¦ ¦
MH-Z19 ==> nc Tx Rx Vin GND nc xx
¦ ¦
SDS021==> Tx Rx GND nc 5V (hole)
blu yel blk red
¦ ¦
SDS011==> (hole) Tx Rx GND 25um 5V 1um nc
GND BAT
¦ ¦
+-+---+-+
¦gnd Vin¦
¦step-up¦
¦GND 5V ¦
+-+---+-+
* R = pins connected to RFM95
* X = avoid main function on these pins for compatibility with 32u4 Beetle
* for pushbutton to work, need to enable the internal pull-up -----------------------------------------------------------------------------
I2C things:
Groove ==> SCL SDA V GND
GY-91 ==> Vin GND SCL SDA
HMC5983 ==> Vin GND SCL SDA
GY-BMEP 280 ==> Vin GND SCL SDA
2x AD op de LeoEQ7 ==> Vin GND SCL SDA
¦ ¦ ¦ ¦
red blk whi yel
¦ ¦ ¦ ¦
¦ ¦
¦ ¦
SDS021==> hole 5V nc GND Rx Tx ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦
red blk yel blu ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦
¦ ¦ ¦ ¦
GPS BN-180/BN-200/BN-220 ==> (batt) VCC RX TX GND ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
+---------+ red gre whi blk ¦ ¦ ¦ ¦
¦ LiPo ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ 380 mAh ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦protected¦ ¦ ¦ ¦ ¦ ¦ ¦
+---------+ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ tx¦ rx¦ Vbat/2¦ ¦ ¦I2c¦
+--------¦--¦--- ---+---X---+---X---X---+---+---+---X---X---+---+-------+
¦ - + BAT EN 5V 13 12 11 10 9 6 5 3 2 ¦
¦ (LIPO CONN) USB LED A11 A10 A9 A7 SCL SDA ¦
¦ +------+ +----------------+ DIO3 R
¦(USB CONN) LORA32U4 ¦ATMEGA¦ ¦ RFM95 / HDP13 ¦ DIO2 R
¦ ¦ 32U4 ¦ ¦4=rst 7=irq 8=cs¦ ¦
¦ (RST BTN) +------+ +----------------+ ant(0)-
¦ 18 19 20 21 22 23 15 16 14 RX TX ¦
¦ RST 3V3 REF GND A0 A1 A2 A3 A4 A5 SCK MOSI MISO 0 1 DIO1 ANT +
+---+--=+===+===+===+=--+---+---X---X---X---R---R---R---+---+---R-------+
¦ GND ¦ ¦ ¦ ¦ ¦ ¦ xxx xxx xxx rx tx
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ SPI-RFM95 serial1
... ... ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
GND out ¦ ¦ ¦ ¦ ¦ ¦ ¦
pushBtn ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦
red gre whi ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
TEMT6000 ==> VCC GND OUT ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦
blk whi gra pur zzz ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦
LeoEQ7 ==> gnd res pul nc nc ¦ ¦
¦ ¦ ¦ ¦
MH-Z19 ==> nc Tx Rx Vin GND nc xx
GND BAT
¦ ¦
+-+---+-+
¦gnd Vin¦
¦step-up¦
¦GND 5V ¦
+-+---+-+
* R = pins connected to RFM95
* X = avoid main function on these pins for compatibility with 32u4 Beetle
* for pushbutton to work, need to enable the internal pull-up Important: bytes 0 to 8 (nine bytes) are agreed format for TTNmapper.org
who will ignore any further bytes. They expect SF7 signal, which is our
default choice also for other reasons.
-- start with TTNmapper defined format
byte 0, 1, 2 Latitude 3 bytes, -90 to +90 degr, scaled to 0..16777215
byte 3, 4, 5 Longitude 3 bytes, -180..+180 degrees, scaled 0..16777215
note: earth circumfence is 40.075 km; finest data step is 40075*1000/16777215 = 2.5 m
2.5 m is about the GPS accuracy of 2..3 meters, so data format is efficient
byte 6, 7 Altitude 2 bytes, in meters. 0..65025 meter
byte 8 GPS DoP byte, in 0.1 values. 0..25.5 DoP
-- now our 'internal' values
9 VCC byte, 50ths, 0 - 5.10 volt -- secret voltmeter
10 CPUtemp byte, -100 - 155 deg C -- secret thermometer +/- 10 degrees
11 Vbat byte, 50ths, 0 - 5.10 volt -- hardwired Lora32u4
12, 13 A0
14, 15 A1 ?? 10 bit analog read from A1 = TEMT6000 0..1023
...
18, 19, 20, 21 DateTime btn on 4 bytes, bits 6 Y-2000, 4 M, 5 D, 5 H, 6 M, 6 S
22, 23, 24, 25 DateTime btn off 4 bytes, bits 6 Y-2000, 4 M, 5 D, 5 H, 6 M, 6 S
-- BME280
26, 27 BME280 Temperature 2 bytes (bme280_temperature)/100 + 100
28, 29 BME280 Moisture 2 bytes, (bme280_humidity)/100
30, 31 BME280 AirPress 2 bytes, (bme280_pressure)/10
-- SDS021
32, 33 SDS021 PPM 2.5 2 bytes, pm25/10; // ug/m3
34, 35 SDS021 PPM 10 2 bytes, pm10/10; // ug/m3
-- MH-Z19
36, 37 MH-Z19 CO2 2 bytes,
-- LeoEQ7
38-54 Audio averages 16 bytes
Audio all 16 bit analog read 0..65536
Audio 1, 63Hz 16 bit analog read 0..65536
Audio 2, 160Hz 16 bit analog read 0..65536
Audio 3, 400Hz 16 bit analog read 0..65536
Audio 4, 1.000Hz 16 bit analog read 0..65536
Audio 5, 2.500Hz 16 bit analog read 0..65536
Audio 6, 6.250Hz 16 bit analog read 0..65536
Audio 7, 16.000Hz 16 bit analog read 0..65536
-- A0 switch
12, 13 10 bit analog read from A0 = Pushbutton 0..1023
14-17 DateTime btn on 4 bytes, bits 6 Y-2000, 4 M, 5 D, 5 H, 6 M, 6 S
18-21 DateTime btn off