Live data V1.
//Category: Breathe2
A citizen powered air pollution monitoring network for city of Pune.
Team – Abhijeet Savant, Sumithra Surendra Lal (SSLA, Pune), Mayuresh Kulkarni (Modern College, Pune) and Subir Bhaduri.
Support funding – IndiaSpend.com, Mumbai and self.
//V1 Costing
//| Cost ( Indian Rupees) | ||
| 1st Prototype | Batch production | |
| Wemos D1 Mini (ESP8266) | 400 | 320 |
| Sensiron’s SPS30 | 4817 | 3475 |
| Bosch’s BME280 | 762 | 610 |
| SIM800 module | 800 | 640 |
| PCB | 2000 | 667 |
| Supporting Electronics | 500 | 400 |
| Power adapter (9V) | 200 | 160 |
| SIM card + 3 month recharge | 509 | 509 |
| Pipe Casing | 450 | 360 |
| Cloud costs / device | – | 300 |
| Online backup UPS | 1600 | |
| labor charges | 1000 | 500 |
| Overheads, Workshop rents, etc | – | 500 |
| Sustainable minimal profits | – | 1500 |
| Total | 11438 | 11540 |
So selling cost for trial runs could be about 10k (without UPS support) or 12k with UPS support for continuous running.
Prototype V1 (Created – 25th Apr 2019)
//Inspired by Breathe device network of IndiaSpend.com
Aim:
Make a low cost but decent performance air quality monitoring device that can upload real-time data to the web for city-scale geographic analysis of air pollution.
Breathe2 Features:
- Bosch’s BME280 sensor : pressure, temperature and Relative Humidity
- Sensiron’s SPS30 sensor: PM1, PM2.5, PM4, PM10
- Wemos D1 mini Lite : ESP8266 based microcontroller with WiFi.
- SIM800L : GSM/GPRS module for cell tower connectivity (alternative to WiFi)
- Simple low cost physical structure of PVC pipes.
- Opensource (link soon).
Where is it installed:
For testing and calibration purposes Prototype1 has been installed about 10m away from the government’s SAFAR device situated at Indian Meteorological Department (IMD) Office (Shimla Office as known in Pune) at Shivajinagar, Pune.
Live data:
- Pressure, humidity and temperature : https://thingspeak.com/channels/795358
- PM mass concentrations : https://thingspeak.com/channels/795359
- PM number concentrations : https://thingspeak.com/channels/795363
Physical structure overview
Challenges / next steps:
- Verify if Particulate Matter (PM) data is similar to SAFAR data from Govt. of India.
- See if device can withstand harsh external conditions such as thunderstorms, heat waves and dew condensation conditions.
- See if device has repeatability over various environmental conditions.
- Develop robust web-services for collection, analysis and public display of data.
- Dream: Add a noise sensor to device.
Team:
- Abhijeet Savant
- Subir Bhaduri
- Mayuresh Kulkarni