nRF51822 in Taiyo Yuden module - anything special I need to do?

[Occam Dude]

I have the nRF51822-DK and have been able to build and run the sample projects, e.g, ble_app_beacon.

I've just built a board using Taiyo Yuden's EYSFCNZXX module that's based on the nRF51822:

www.yuden.co.jp/.../TY_BLE_EYSFCNZXX_Overview_V1.0_20131225.pdf

I can download and verify the S110 soft device to the module (7.1.0), and download and verify ble_app_beacon, I can debug, the Kiel environment indicates that the app is running, but I don't see the module when I do a scan with my Android phone.

Is there anything that I should change in my settings when moving from the DK to the EYSFCNZXX module? Or is my hardware likely bad?

If it's of interest, the module is drawing about 0.85 mA when running ble_app_beacon. I only draw a quarter of that when running on the DK. My own board is just a breakout board, with the module, reset button (150 ohm to ground on SWDIO), and filter/bulk caps.

Thanks in advance!

[Nguyen Hoan Hoang]

Have you made a keep out region under the antenna ? There must be no traces, no planes under the antenna area. If you have a ground plane underneath, it will shield your signals.

[Occam Dude]

Yes, keep out is OK, thanks.

[Nguyen Hoan Hoang]

Then the only thing left to check is the code. Try a different example, the ble one to see if at least you know the module works. A side that I don't what else could be wrong.

[Petter Myhre]

What version of SoftDevice and SDK are you using? Are you able to debug? Please edit your question to include the information.

[Occam Dude]

I found the issue thanks to a pointer from another devzone user. The EYSFCNZXX has a 32MHz clock rather than the 16MHz that' standard for the nRF5822, and code needs to be updated slightly to accommodate this - in vesion 1.32 of the EYSFCNZXX Data Report document, the specifics are on page 21 (the last page).