No UARTs for GPS

[olivercrask]

GPS module needs integration but it has no spare UART connections. Cellular and pollution sensor are using up both.

[olivercrask]

Proposed solution for now is connected GPS to arduino and communicate between raspberry pi and arduino over I2C.

• [x] Test GPS module with Arduino

• [x] Test I2C between Arduinos

• [x] Write python code to clean up I2C output (will be messy due to GPS protocol)

• [ ] Test I2C Arduino to Raspberry Pi

• [ ] Integrate to pollutant monitoring program

[robmarkcole]

I know that your hardware solution is pretty advanced but we might also consider alternative hardware. For example we could swap out the pi for a pycom board. I think it would make a good impression if our hardware looked a bit slick. I've got a spare wipy board you can use

https://pycom.io/product/pytrack/

https://pycom.io/product/lopy4/

[olivercrask]

Funnily enough I contacted pycom yesterday to see if I can get a sample of their sigpy. I've been planning on upgrading to a sigfox device for a while now. Much lower power usage with pretty good coverage.

WiPy only has WiFi right? It'd need some other kind of connectivity.

[robmarkcole]

You need to check sigpy/lowra coverage. I think sigpy is mostly mainland europe

WiPy is wifi only but it would give you a chance to check compatibility with your sensor and decide if this is a route we want to go down?

[olivercrask]

SigFox has good coverage over the UK. Lora only had coverage where users have created gateways and there aren't any around here (near me at least)

[olivercrask]

True, definitely worth testing it with WiPy

[robmarkcole]

OK didn't know about Sigfox. Will bring in my Wipy

[olivercrask]

Though I'm pretty sure it will work, got a contact in Michigan who is already using Lora and an ESP32 based board with the same sensor so compatibility shouldn't be too much of an issue

[olivercrask]

Okay great