NMEA over BLE (external GNSS unit)
At first, thanks for the awesome app for bikers! Currently I am using a Locus Map Pro in latest version. I am not happy with GNSS performance on the phone (Oneplus 5) in not ideal conditions, so I am planning to build my own (dual band L1+L5) GNSS receiver (LC79D) with BLE module HM-BT4502 from HopeRF (datasheet: https://www.hoperf.com/data/upload/portal/20200103/HM-BT4502 Bluetooth Low Energy (BLE) Pass-through Module Specification.pdf ).
I read somewhere in the forum that currently only Bluetooth 3 (over SPP?) external GNSS is supported. I will send the NMEA sentences directly over Bluetooth.
Is it plausible to implement a support for BLE for external GNSS unit with custom serial profile? Something like in this app (see attachment), https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal
There is also open source code for it on github: https://github.com/kai-morich/SimpleBluetoothLeTerminal
Thanks for your responds.