Debugging DIY 10Hz...

[DitPun]

Dear All, I was inspired by this DIY:

https://did-it-myself.com/diy-10hz-blue ... -receiver/

...to try my hand at making a similar device, though with connectivity with iOS. Due to the various issues in connecting regular Bluetooth devices to iOS, I used an HM-10 BLE device instead of the HC-06 used in the above link. Also, I used the "Adafruit Ultimate GPS Breakout" module (MKT3339 based) for GPS.

The good news is that using a BLE terminal app (Bluetooth Serial) on my iPhone, I was able to connect to the HM-10 and was able to see the GPS messages as they streamed in. I was also able to send commands to change to RMC, the update rates, etc. However, the LapTimer app didn't connect via Custom GNSS BLE. In light of the fact that nothing else recognized the data stream as GPS, I'm going to assume the issue is that this simple circuit is not sending the correct GATT service codes to the phone, though I'll have to admit my knowledge of BLE protocols is elementary.

Note that I also have an HC-06, and when I plugged this into the circuit, it was recognized by my old Samsung Note as a GPS device.

Any thoughts on if this kind of simple GPS->CLE device can work with iOS? If not, I'm going to try the Arduino based solution using WiFi that was posted a few days ago.

Thanks!

[Harry]

Hi,

Please apply to participate in our Developer Program: send your mail address and forum id to Harry@gps-laptimer.de
We can log what is going on with the communication once you are in.

- Harry

[nathan8]

Hi

I appreciate this is a bit old, but I am at the same point.

BLE does not pair with the device but communicates a stream direct to Apps.
I can see this with a BLE program (bluetooth serial).

But cannot get Harry's laptimer to see it. I tried a few items in the sensor list, but suspect that the Custom BTLE GNSS is the right one.

Did this get anywhere?

BR - Nathan

(HM10 to iphone).(Tried HC06 and HC05 - iphone will not pair with those. Problematic!)

[Harry]

Information on the developer program is available in http://www.gps-laptimer.com/LapTimerDoc ... rogram.pdf Please note this is on v22 already, but will give you an idea for the current v21 implementation too. Without developer program, the Custom BTLE GNSS option is the way to try.

- Harry

[Zyx139]

Nethan, any progress with your custom receiver?
I’m thinking to doing same thing if you are willing to let me know of it work properly.

Thank you!

[rbono459890]

BTLE is a great option!

Understanding how BLE works vs a regular serial connection took some time, but I was able to make it work nicely and reliably - code I used is here https://github.com/renatobo/bonogps together with how I configured HLT to use BLE https://github.com/renatobo/bonogps/tre ... rylaptimer

Example of the outcome (iOS using BLE provided by ESP32 connected to a BN-880 GPS)

[Harry]

Thanks Renato for completing this project. I see you really took this serious! Great research, great solution, and great documentation! I just featured it on LapTimer's Facebook page: https://www.facebook.com/HarrysLapTimer ... 4609768294

Thumbs up!

Harry