README.md

Hardware

• Tracking code, requirements, BOM and so on, for delivering the hardware solution

Transmitter

• Gather data from sensors, send to gateway using LoRa
• No internet connection required

Receiver

• Collect data from transmitter nodes
• Parse / verify and upload to project API
• Either requires internet connection to function, or connection to network hosting the API, may look to allow fully offline/off-grid functionality going forwards

BOM - Field Sensors

Unit	Cost	Description	Link
WeMos D1 Mini	£1.58	Micro Controller	Buy
Raspberry Pi Model 4	£x.xx	SBC	Buy
RA-01 / RA-02	£2.13	433MHz SX1278 LoRa Transceiver Modules	Buy
PMS5003	£10.33	Plantower Laser Air/Partical/Dust Sensor	Buy
SHT30	£1.23	Temperature / Humidity Sensor	Buy
S8-0024 S8-4B	£11.95	SenseAir Infrared Co2 Sensor	Buy
SSD1306	1.16	0.91" 128x32 Pixel Display	Buy

Pinout - Transmitters

Plantower PMS5003 Partical Sensor

PMS5003	D1 Mini
Pin 1	VCC 5V
Pin 2	GND
Pin 5 TX	D4 (RX)

LoRa RA-02

RA-02	D1 Mini
GND	GND
3.3V	VCC 3.3V
RST	D3
D100	D2
NSS	D1
MOSI	D7
MISO	D6
SCK	D5

SHT3X-DIS Temp/Humidity Sensor

SHT3X-DIS	D1 Mini
GND	GND
VCC	VCC 3.3V
SCL	D1
SDA	D2

SenseAir S8-4B

SenseAir	D1 Mini
VCC	VCC 3.3V
GND	GND
TX
RX

LCD SSD1306 128x32 i2c

LCD	D1 Mini
VCC	VCC 3.3V
GND	GND
SCK
SDA	D2

Pinout - Wemos D1 Perspective

Board	Physical	Component
D0	16	NSS LoRa
D1	5	SCL SHT
D2	4	SDA SHT
D3	0	RST LoRa
D4	2	TX Partical
D5	14	SCK LoRa
D6	12	MISO LoRa
D7	13	MOSI LoRa
D8	15	Dio0 LoRa
3.3V	-	LoRa, SHT
5.0V	-	Partical
GND	-	Lora, SHT, Partical
TX	1
RX	3

Pinout - Raspberry Pi Perspective

• N.B. Using Physical Pin Numbering

Raspberry Pi (Physical)	Component	Component Pin
3.3V	LoRa SX1278	3.3V
GND	LoRa SX1278	GND
15	LoRa SX1278	Dio0
23	LoRa SX1278	SCK
24	LoRa SX1278	NSS
21	LoRa SX1278	MISO
19	LoRa SX1278	MOSI