Adding basic BLE Notify example for sending GPS data

[FlorianMuellerklein]

Hey ASL! Here's a basic BLE GPS example. It's a simple example will create a BLE notify server and send updates every time the GPS module updates. I don't have the bolt-on that you all sell because I made my own ESP32 GPS device before I was aware of what you all have done. But, I made the changes based on the other scripts and this should run with your hardware (changing baud rate and pins to match your other examples).

A 32 byte payload is created and transfered on each GPS update.

• bytes 0-7 latitude
• bytes 8-15 longitude
• bytes 16-23 speed m/s
• bytes 24-25 year
• bytes 26 month
• bytes 27 day
• bytes 28 hours
• bytes 29 minute
• bytes 30 second
• bytes 31 centisecond

[brentpicasso]

@FlorianMuellerklein thanks! Looks pretty clean and straightforward; I'll give it a brief whirl and then likely approve/merge.

Can you recommend a generic BTLE android app do you recommend for testing this?

[FlorianMuellerklein]

@brentpicasso I've used this in the past to test things: https://www.nordicsemi.com/Products/Development-tools/nRF-Connect-for-mobile. It obviously won't parse the bytes but you should be able to confirm that you are receiving 32 bytes on each update when you subscribe to the service.

[brentpicasso]

@FlorianMuellerklein - See this PR for updates to our standard GPS -> broadcast; there's an improvement where we configure the GPS receiver to update at 10Hz vs the standard 1Hz.

perhaps you'll want to update your PR with this enhancement? #22

[FlorianMuellerklein]

@brentpicasso It's updated now with the baud rate and GPS frequency change. Unfortunately, it's untested on my end right now.

[brentpicasso]

Got it. Are you able to test it soon on your end?

[FlorianMuellerklein]

Yes, I just need to solder my board together. I'll report back when it's done unless you all get to it first.

[FlorianMuellerklein]

@brentpicasso for whatever reason I can't get any readings from the GPS bolt on. Even with this other example from your repo. Tiny GPS just reads 0 for every field.

[brentpicasso]

@brentpicasso for whatever reason I can't get any readings from the GPS bolt on. Even with this other example from your repo. Tiny GPS just reads 0 for every field.

Any update?

[FlorianMuellerklein]

@brentpicasso Unfortunately not. I believe that I've either broken something when soldering everything together (more likely) or GPS module isn't working for whatever reason.