Hello,
we developed our electronics with your chip nRF52840, but we have problem with communication throught BLE. We tried our firmware on dev kit with this chip. It was ok. After that we developed our board. Inspired with a n RF52840 dev kit, but with a chip antenna 2450AT18B100. It works but, badly. New revision of our boards can not be find, if we use BLE scanner in our phones for detect our board. Probably our matching circuit on board is bad.
Next our step was unsolder chip antenna and on their place try solder a thin long wire and cut that wire mm by mm. Still doesn‘t work. The devices can not be find in our BLE scanners. We tried unsolder capacitance from our matching circuits from desks and later all matching circuit on pcb. Inductor was raplaced by short. Same result.
So. We have firmware and we know: it‘s ok. Our hardware doesn‘t work in RF part. What we can change, try for get better result?
We need find a solution for the already made boards.
