https://github.com/djaus2/rpipicowgpsandbt

A set of Arduino Sketches for execution on a RPI Pico W involving GPS Bluetooth and Azure IoT Hub
https://github.com/djaus2/rpipicowgpsandbt

arduino bleutooth gps serial-communication

Last synced: about 2 months ago
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A set of Arduino Sketches for execution on a RPI Pico W involving GPS Bluetooth and Azure IoT Hub

• Host: GitHub
• URL: https://github.com/djaus2/rpipicowgpsandbt
• Owner: djaus2
• License: gpl-3.0
• Created: 2023-08-11T07:35:27.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2023-08-28T01:21:50.000Z (almost 3 years ago)
• Last Synced: 2025-04-23T18:19:27.445Z (about 1 year ago)
• Topics: arduino, bleutooth, gps, serial-communication
• Language: C++
• Homepage:
• Size: 536 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# RPI Pico W GPS Bluetooth and Azure IoT Hub

A set of Arduino Sketches for execution on a RPI Pico W  building up to and including sending GPS location data over Bluetooth in BT Classic mode. Also send GPS data to an Azure IoT Hub.



### Update/Correction

> The calculation of Latitude and Longitude from NMEA data has been corrected ina a number of projects as per my blog post :[GPS: NMEA 101](https://davidjones.sportronics.com.au/web/GPS-NMEA_101-web.html).



## Blog Post

[RPI-Pico-Arduino-AzSDK: Bluetooth and GPS Update](https://davidjones.sportronics.com.au/ardpico/RPI-Pico-Arduino-AzSDK-BlueTooth_Setup_Update-ardpico.html)

## Hardware

### Bluetooth

The RPI PicoW comes with Bluetooth. The BSP used has been updated to include that.

- The repository for the Pico W Arduino BSP: [earlephilhower-arduino-pico on Github](https://github.com/earlephilhower/arduino-pico)

- Installation [instructions](https://davidjones.sportronics.com.au/ardpico/RPI-Pico-Arduino-AzSDK-PicoWSetup-pic-ard.html#how-to-install-arduino-bsp-onto-a-rpi-pico)

- [Bluetooth documentation for the BSP](https://arduino-pico.readthedocs.io/en/latest/bluetooth.html)

### Arduino GPS Receiver

  - Arduino Compatible GPS Receiver Module Jaycar (Australia) CAT.NO:  XC3710

  - https://www.jaycar.com.au/arduino-compatible-gps-receiver-module/p/XC3710

  - nblox NEO-7M Module  BAUD is 9600

## Projects

1.**USART1 Echo**

  - Echo text from **Serial terminal** _(uppercased)_ back to it after first passing it through **USART1 in loopback mode**.

2.**Basic GPS**

  - Read and echo NMEA sentences to **Serial terminal**

3.**InteractiveGPS**

  - Can send commands to device from **Serial terminal**:

    - s: Start

    - p: Stop

    - n: No filter on messages

    - n: Filter all _(none displayed)_

    - a: Display GPGGA - Global Positioning System Fix Data

    - l: Display GPGLL - Geographic Position, Latitude / Longitude

    - v: Display GPGSV - Satellites in view

4.**LocationGPS**

  - Filter all messages except GPGGA

  - Get latitude, longitude and height

  - _Note that string processing of NMEA messages is explicit rather than using existing libraries._

  - Commands:

  - - s: start

    - p: stop

    - n display none

    - d: Display GPGGA string

    - l: Display as location tupple

    - t: Display as json telemetry

  - Has been modified for Sketch 7.

    - Parsing of NMEA in "reusable" function.

5.**BTSerialUppercase**

  - Receive text over Bluetooth and echo it back after upper-casing it.

  - Is the Android IDE **SerialBT** _BTSerialUppercase_ example  

  - Added echo to IDE Terminal of the characters being passed, unadulterated.

  - **_Note:_** Bluetooth Classic, not BLE.

  - Found the [Android phone app Serial Bluetooth Terminal](https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal) was easier to pair than desktop.

6.**BluetoothGPS**

  - ****Send Location data over Bluetooth to paired host.****

  - As per 4 but data and commands over Bluetooth _(Merger of 4. and 5.)_

  - Receives commands over BT as per **_BTSerialUppercase_** and interprets them as per **_LocationGPS_**.

    - That is, sends Location data back over BT when available as per **_LocationGPS_** _(to SerialBT instead of Serial)_ 

  - **_Note:_** Bluetooth Classic, not BLE.

7.**Azure_IoT_Hub_GPS**

  - Send GPS location data, generated as per **LocationGPS**, as Telemetry to an Azure IoT Hub. 

    - _Minus interactive commands._

  - Filter all messages except **GPGGA**

Get latitude, longitude and height

  - From **LocationGPS** uses json location option.

      - That is, all creation of the telemetry string explicitly uses string processing rather than GPS and json classes.

  - Now works.

8. **read-d2c-messages**

  - .NET Console app to monitor messages sent to IoT Hub by 7.

  - Uses .NET Core 3.1

  - See code for connection details.

  

  > Nb: Was found that in **Azure IoT Explorer**, needed to paste same connection string as the Custom Endpoint for the device. Built-in [Yes] option did not work.

  

9. **read-d2c-messages-Net6**

  - As per 8. but uses .NET 6.0

  - See code for connection details.



## Footnote

Working on a Blazor app to display the GPS coordinates sent by 8. on a map.

See [djaus2/GPSMapIoTHub](https://github.com/djaus2/GPSMapIoTHub)