Intro:
Goal: have small (one size <10 mm) board with BLE.
Decide this:
- use Holyiot 17095 as a board.
- use mbed OS / v5 (Online IDE) as a development env.
Tried to flash external board (Holyiot 17095) with:
- with J-link (made from STLink V2 by reflashing).
- with nrf51-DK
- with nrf52-DK. (by drag & drop and nrfGo)
Connection Used P20 by this schema.
All cases showed that flashing was well, but the blink example did not work. On DK-52 & DK-51 blink worked well.
Tried to flash BLE firmware that worked well on DK, on custom board - I saw the device on nrfConnect App (Android) but can't connect - error: "Error(0x85):GATT ERROR".
Question:
- How to flash external board and make it run?
Guess:
- I need to flash some bootloader to my external board.
Any ideas or recommendations are welcome! Thanks.
