Link: Kaasfabriek, 2017/2018
MICRO GPS TRACKER
Quinten heeft onze allerkleinste GPS tracker gebouwd. Dit is écht de kleinste die we tot nu toe hebben gemaakt. Deze kan je online op de kaart volgen.
Deze doet het bijna, de laatste dingetjes worden nu geregeld.
Met hetzelfde idee gaan we vanaf 1 februari aan de slag om een spel te bouwen. In het spel gaan teams de binnenstad in, om gebieden in de stad te veroveren, en tegelijk met milieu metingen de binnenstad in kaart te brengen.
Onze Junior IOT kanjers hebben vanalles geleerd over solderen, electronica, GPS, programmeren, meten, én ook over het verzenden van meetgegevens over het (gratis) draadloze netwerk van The Things Network.
De beschrijving hoe alles aangesloten wordt kan je vinden op onze github.
Hiervoor heb je genoeg aan een arduino, een gps module en een lora zend module. En natuurlijk de software van de github.
Project informatie
- Projectnaam: Micro GPS tracker
- Maker: Junior IOT
Github: https://github.com/JuniorIOT/Junior_Internet_of_Things_2018
Bron: https://kaasfabriek.nl/projecten/micro-gps-tracker-voor-junior-iot-challenge
=-=-=-=-=-
Github README.md
Junior IOT – Smart City Challenge 2018 – Fablab de Kaasfabriek
Inexpensive low-quality Lora32u4 GPS tracker for #juniorIOTchallenge 2018
Inexpensive low-quality Lora32u4 GPS tracker
this set of folders is for #JuniorIOTchallenge - Smart City Challenge 2018
met leerling teams bij fablab de Kaasfabriek in Alkmaar
deze software op het internet is natuurlijk geheim...
...anders kunnen ze makkelijk afkijken!
previous iteration is Junior IoT Baloon Challenge february 2017
so for ora location transmittor with GPS and rfm95 see
https://github.com/Kaasfabriek/GPS-Lora-Balloon-rfm95-TinyGPS/tree/master/Balloon-rfm95
Credits:
- Software plakker: Dennis –> [email protected]
- Educatie kletser: Marco –> [email protected] mailto:[email protected]
- Regie en inspiratie: [email protected]
- Junior IOT Challenges: [email protected]
Important
Some practical soldering tips in nice pictures: https://www.thethingsnetwork.org/labs/story/build-the-cheapest-possible-node-yourself –> you will need to use our pin mapping instead
Parts list
- Lora32u4 with antenna, frequency 868 Mhz – 12 euro on Ebay and AliExpress optional:
- GPS
- Compass
- Solar Powerbank + lipo protect strip
- Lipo 380 mAh
Important files and folders
- juniorIOTchallenge_Lora32u4_gpsTracker_with_extras (folder) this is the GPS tracker, with demo code added got compass and peer-to-peer radio
Libraries required
Pin mapping for Lora32u4
-----------------------------------------------------------------------------
2A usb charge cable
┌────────────────────────────────────────┐ │ one or more I2c modules:
│ solar ┌──────────────────────────┐│ │ ┌───────────────┐
│ powerbank │ controll board (Mini USB)─┘ │ Oled display │
│ enclosure │ B- B+ S- S+ ││ │Vin GND SCL SDA│
│ └──────┼─┼────┼─┼──────────┘│ └─┬───┬───┬───┬─┘
│┌────────────────┐ │ │ ┌─│─│─────────┐ │ │ │ │I2c│chained
││ 1-5x 1800mAh +┼─│─┤ │ - + 200 mA │ │ ┌────────────────────┐
││ Li-Ion 18650 - ┼─┤ │ │ solar panel│ │ │BME/BMP280 or BME680│
│└────────────────┘ │ │ └─────────────┘ │ │Vin GND SCL SDA │
└───────────────────│─│──────────────────┘ └─┬───┬───┬───┬──────┘
┌──────────────────────┼─┼──┐ │ │ │I2c│chained
│ Lipo protect - + B- B+ │ ┌────────────────────────┐
└─────────────────┼─┼───────┘ │ GY-91 (BMP280+MPU9250) │
│ │ ┌───────────────────────┐ │Vin GND SCL SDA 3 SD A B│
│ │ │ GPS GN-801 │ └─┬───┬───┬───┬──┬─┬──┬─┬┘
│ │ │or BN-180/BN-200/BN-220│ │ │ │I2c│chained
│ │ │ 3V3 GND RXD TXD│ ┌────────────────────────┐
┌─────────┐ │ │ └─┬───┬───┬───┬───┬───┬─┘ │ compass HMC5983 │
│ LiPo │ ext 3V3 GND │ │ │Vin GND SCL SDA CS SD DR│
│ 380 mAh │ - + <50mA │ │ └─┬───┬───┬───┬──┬──┬──┬─┘
│protected│ │ │ │ │ │ │ │ │
└────┬──┬─┘ ┌─┘ │ tx│ rx│ Vbat/2│ │ │I2c│ ant
╔════════│══│═══│═══╬═══X═══╬═══X═══X═══╬═══╬═══╬═══X═══X═══╬═══╬═══════╗ │
║ - + │ BAT EN 5V 13 12 11 10 9 6 5 3 2 ║ │
║ (LIPO CONN)│ LED A1 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)─┘
║ │ 15 16 ║
║ RST 3V3 REF GND A0 A1 A2 A3 A4 A5 SCK MOSI MISO 0 1 DIO1 ANT ╬
╚═══╬═══╬═══╬═══╬═══╬═══╬═══╬═══X═══X═══X═══R═══R═══R═══╬═══╬═══R═══════╝
│ __│ ? ? xxx xxx xxx RX TX
└─ ┘ │ │ SPI-RFM95 serial1
pushbutton │ │ ? ? 18mA
GND BAT │ │ GND 5V │ │ GND 5V
┌─┼───┼─┐ ┌─┴───┴───┴───┴──────┴┴┴┐ ┌─┴───┴───┴───┴──┴┴┴┐
│gnd Vin│ │RXD TXD GND 5V misc│ │TXD RXD GND 5V misc│
│step-up│ │ PM dust sensor │ │ Co2 sensor │
│GND 5V │ │SDS021 42x32x24mm 60mA │ │ MH-Z19 │
└─┼───┼─┘ │SDS011 71x70x23mm 220mA│ └───────────────────┘
└───────────────────────┘
* 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
* pin-out for GPS BN-180/BN-200/BN-220 ==> (led) GND TX RX VCC (batt)
* pin-out for SDS021 ==> (hole) (1) 5V NC GND Rx Tx (5)
* pin-out for SDS011 ==> (1) CTL 1umPWM 5V 25umPWM GND Rx Tx (7) (hole)
* pin-out for MH-Z19 ==> 2 rows, and sometimes a 7 pin connector:
brown Vout 3.3 ─
white (nc) ─ (HD)
black GND ─ (SR) PWM
red Vin 5v ─ Tx (green (AoT)
blue Rx ─ Rx bottom) GND
green Tx ─ (Vout 3.3V) Vin 5V
yellow (nc) ─ (side window)
Pin mapping for Xtra small implementation (project X) on 3.3V SS Beetle
-----------------------------------------------------------------------------
┌───────────┐
│ │ │ │ │
│ │ │ │ │
│ │ │ │ │ ╔═══════════════╗
╔══════│ │ │ │ │══════╗ ┌────┐ ╬GND DIO2╬
PM TXD╬A2 MO╬───│──┐ └─╬MISO DIO1╬
PM RDX╬A1 SCK╬───│─┐└───╬MOSI DIOO╬
GND─BTN─╬A0 SS MI╬───┘ └────╬SCK RFM95 3.3V╬─3V3
I2c sda ╬A10 D9 BEETLE RST╬ ╬NSS DIO4╬
CO2 tx╬A11 D10 5V╬ ╬RESET DIO3╬ ant
CO2 rx╬D11 RX TX SDA SCL GND╬ ╬DIO5 GND╬ │
║ D6 D0 D1 D2 D3 3V3 ║ gnd╬GND ANA╬─────┘
╚══╬═══╬═══╬═══╬═══╬═══╬══╝ ╚═══════════════╝
RXD TXD I2C I2C RFM
CO2 CO2 SDA SCL 3V3
+ LiPo?
Pin mapping for Xtra small on 5V CJMCU Beetle
-----------------------------------------------------------------------------
┌───────────┐
│ │ │ │ │
│ │ │ │ │
│ │ │ │ │ ╔═══════════════╗
╔══════│ │ │ │ │══════╗ ╬GND DIO2╬
║ MI╬──────────╬MISO DIO1╬
║ MO╬──────────╬MOSI DIOO╬
I2c sca ╬SCA CJMCU SCK╬──────────╬SCK RFM95 3.3V╬─diode─5V
I2c sda ╬SDA BEETLE RES╬ ╬NSS DIO4╬
CO2 tx╬RX GND╬ ╬RESET DIO3╬ ant
CO2 rx╬TX 5V╬ ╬DIO5 GND╬ │
║ D11 D10 D9 A0 A1 A2 ║ gnd╬GND ANA╬─────┘
╚══╬═══╬═══╬═══╬═══╬═══╬══╝ ╚═══════════════╝
rx tx │ RXD TXD
GPS GPS push PM PM
btn
│
gnd
Pin mapping for Sodaq Explorer & NB-IOT gps shield
┌───────────────────┐
│ MH-Z19 18mA│ ┌───────────────────────┐
│ Co2 sensor │ │ PM dust sensor │
│misc GND 5V RXD TXD│ │SDS021 42x32x24mm 60mA │
└┬─┬─┬─┬───┬───┬───┬┘ │SDS011 71x70x23mm 220mA│
│ │ │ │ │RXD TXD GND 5V misc│
┌───┐ ┌───┐ GND 5V │ │ └┬───┬───┬───┬────┬─┬─┬─┘
│ led ┌───┐ │ push │ │ │ │ │ │
SODAQ │ │ │ spk │ btn │ │ │ │ gnd 5v
EXPLORER I2c │ │ │ │ │ │ │ │ │ │
╔═════════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═╗═══════════════╗
║RSTBTN SCL SDA X GND D13 D12 D11 D10 D9 D8 - D7 D6 D5 D4 D3 D2 D1 D0 ║ lora║
║ SCK MI MO SS tx rx tx rx TX RX ║ ant║
║ LED-BUILTIN Serial ║ ║
║ TEMP_SENSOR LED_RED \\ ║
│USBCONN analog LED_GREEN \\ ║
│SerialUsb LED_BLUE < ATSAMD21 > ║ ║
│ ║ ║
│ A7 A8 ║ ║
║ GND 3V D11 D12 o o+ ║ ║
║ o o o o batt o int [ lora RN2483 ] ║ ║
║BTN o o+ o [ Serial2 ] ║ ║
║ GND 3V SCA SCL solr o ext ║ ║
║BLE o o o o SDA1 SCL1 // ║
║Serial1 X X RES 3.3 5V GND GND BAT - A0 A1 A2 A3 A4 A5 // ║
╚═════════════════════════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═════╬═══╬═══╬═══╬═══╬═══╬═╝═══════════════╝
NB-IOT
SHIELD I2c
╔═════════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═╗
║ SCL SDA X GND D13 D12 D11 D10 D9 D8 - D7 D6 D5 D4 D3 D2 D1 D0 ║
║ TX RX ║
║ LSM303AGR/LSM303C ACCEL & MAGNETO Serial ║
║ [ ] I2C-address ACCEL 0x1D, MAG 0x1E \
║nb-iot [ NB-IOT ] \
║ant [ UBLOX SARA N200 ] HTS221 TEMP&HUM ║
║ [ ] I2C-address 0x5F [ ] ║
║ Serial [ GPS ] ║
║ LPS22HB BAROMETRIC [ UBLOX SAM-M8Q-0-10] ║
║ I2C-address is 0x5D [ ] ║
║ I2C-address 0x42 ║
║ SD CARD RSTBTN ║
║ /
║ X X RES 3.3 5V GND GND BAT - A0 A1 A2 A3 A4 A5 /
╚═════════════════════════╬═══╬═══╬═══╬═══╬═══╬═══╬═══╬═════╬═══╬═══╬═══╬═══╬═══╬═╝
LPS22HB BAROMETRIC
I2C-address is 0x5D
HTS221 TEMP&HUM
I2C-address 0x5F
IOT TTN message format
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; data is 40075*1000/16777215 = 2.5 m
2.5 m is about the GPS accuracy of 2..3 meters
byte 6, 7 Altitude 2 bytes, in meters. 0..65025 meter
byte 8 GPS DoP byte, in 0.1 values. 0.25.5 DoP
-- then a section to detect dark spots in the coverage map
byte 9, 10, 11 Prev Latit
byte 12, 13, 14 Prev Longi
byte 15, 16 Prev Altit
byte 17 Prev DoP
-- now our 'regular' values
byte 18 VCC byte, 50ths, 0 - 5.10 volt -- secret voltmeter
byte 19 CPUtemp byte, -100 - 155 deg C -- secret thermometer
byte 20 Vbat byte, 50ths, 0 - 5.10 volt -- hardwired Lora32u4
byte 21
0b0000 0000
-nnn nnnn Compass 0-120, My compass in 3 degree precision 0..360
Value=127: no compass value
1--- ---- MyBtn#1 bit, is my button pressed
byte 22 myID, dataset:
0b0000 0000
---- -nnn Dataset (not needed - to be re-used) Select Value 0-7 to tell which dataset
nnnn ---- MyTeamID Value 0-31 my team ID
byte 23,24 Temperature 2 bytes (was: counter, 2 bytes)
-- OPTIONAL radio values (leave 00 if not used)
byte 25 RemoteID ID of remote team (who shot me)
0b0000 0000
---- nnnn RadioSSN Received radio strength 1
nnnn ---- RemoteID Value 0-31, Remote team ID
byte 26, 27, 28 RemoteLat 3 bytes, -90 to +90 degrees scaled 0..16777215
byte 29, 30, 31 RemoteLon 3 bytes, -180..+180 degrees scaled 0..16777215
byte 32 R comp ++
0b0000 0000
-nnn nnnn RemoteComp 0-120, Remote Compass 3 degree precision 0..360
Value=127: no compass value
1--- ---- RemBtn#1 bit, is remote button pressed
byte 33 distance ++
0b0000 0000
-nnn nnnn distance 0-100, Distance in meters 0..100
101-120, 100+(x-100)*20 for 120..500
121-126, 500+(x-120)*100 for 600..1100
Value=127: no distance value
1--- ---- Am I Hit My hit status (I was hit?)
Game rule: add 2 degrees on each side of this 3 degree segment
A hit is when target is within this range and within 20 meters +/-3 meters
-- OPTIONAL set environmental sensors values ((leave 00 if not used)
byte 34, 35 Moisture 2 bytes, AD measurement directly from AD port
byte 36, 37 AirPress 2 bytes, AD measurement directly from AD port
byte 38, 39 CO2 2 bytes, AD measurement directly from AD port
byte 40, 41 PPM 2.5 2 bytes, AD measurement directly from AD port put_PM_into_sendbuffer
byte 42, 43 PPM 10 2 bytes, AD measurement directly from AD port
byte 44, 45 Audio 1 2 bytes
byte 46, 47 Audio 2 2 bytes
THIS BYTE STRING NEEDS A DECODER FUNCTION IN TTN:
/* *
function Decoder (bytes) {
var _lat = (bytes[0] << 16 | bytes[1] << 8 | bytes[2]) / 16777215.0 * 180.0 - 90;
var _lng = (bytes[3] << 16 | bytes[4] << 8 | bytes[5]) / 16777215.0 * 360.0 - 180;
var _alt = (bytes[6] << 8) + bytes[7];
var _hdop = bytes[8] / 10.0;
var _prev_lat = (bytes[9] << 16 | bytes[10] << 8 | bytes[11]) / 16777215.0 * 180.0 - 90;
var _prev_lng = (bytes[12] << 16 | bytes[13] << 8 | bytes[14]) / 16777215.0 * 360.0 - 180;
var _prev_alt = (bytes[15] << 8) + bytes[16];
var _prev_hdop = bytes[17] / 10.0;
var _VCC = bytes[18] / 50;
var _tempCPU = bytes[19] -100;
var _Vbat = bytes[20] / 50;
var _compass = (bytes[21] & 127) * 3;
var _myBtn = bytes[21] >> 7;
var _myID = bytes[22] >> 4;
var _dataSetType = bytes[22] & 15;
var _counter = bytes[23] << 8 | bytes[24];
var _inputHEX = bytes.map(function(b) { return ('0' + b.toString(16)).substr(-2);}).join(' ');
// if _dataSetType = 0001 my game data
var _remoteID = bytes[25] & 15;
var _remote_radioSSN = bytes[25] >> 4;
var _remote_lat = (bytes[26] << 16 | bytes[27] << 8 | bytes[28]) / 16777215.0 * 180.0 - 90;
var _remote_lng = (bytes[29] << 16 | bytes[30] << 8 | bytes[31]) / 16777215.0 * 360.0 - 180;
var _remote_compass = (bytes[32] & 127) * 3;
var _remote_Btn = bytes[32] >> 7;
var _remote_distance = bytes[33] & 127;
var _remote_DidHitMe = bytes[33] >> 7;
return {
arduino_VCC: _VCC,
arduino_Vbat: _Vbat,
arduino_tempCPU: _tempCPU,
compass: _compass,
myBtn: _myBtn,
myID: _myID,
dataSetType: _dataSetType,
gps_lat: _lat,
gps_lng: _lng,
gps_alt: _alt,
gps_hdop: _hdop,
gps_prev_lat: _prev_lat,
gps_prev_lng: _prev_lng,
gps_prev_alt: _prev_alt,
gps_prev_hdop: _prev_hdop,
counter: _counter,
payload: _inputHEX,
remoteID: _remoteID,
remote_radioSSN: _remote_radioSSN,
remote_lat: _remote_lat,
remote_lng: _remote_lng,
remote_compass: _remote_compass,
remote_Btn: _remote_Btn,
remote_distance: _remote_distance,
remote_DidHitMe: _remote_DidHitMe
};
}
*/
p2p message format
byte 0 My ID My ID and message type
0b0000 0000
---- nnnn MessType
---- 0001 msg#1 Yelling out loud that I have fired
---- 0010 msg#2 You have fired and here is my answer
nnnn ---- MyID
byte 1, 2, 3 MyLat
byte 4, 5, 6 MyLon
byte 7 MyComp ++
0b0000 0000
-nnn nnnn MyComp
1--- ---- MyBtn#1
byte 8 RemoteID Your ID, hey I am talking to you
0b0000 0000
---- ---n WasIhit Hit indicator
nnnn ---- RemoteID Value 0-31, Remote team ID
byte 9 Validator Hash (binary add) on message, GPS date, salt..
