Programming Raytac MDBT40 (nRF51822 based BLE module)

RE: Programming Raytac MDBT40 (nRF51822 based BLE module)

pavan — Sat, 26 Aug 2017 10:11:11 GMT

hi vineesh,

I am also facing same issue , me programming BLE_UART MDBT40 through nrf51DK , its programming successfully but not detecting in application . is it necessary to connect 32.768kHz crystal and how to program..plz help

RE: Programming Raytac MDBT40 (nRF51822 based BLE module)

vineeshvs — Tue, 03 Nov 2015 06:36:21 GMT

Had to connect 32 kHz crystal from XL1 and XL2 points and 12pF (/22pF) from both of its ends to ground.

Now LED is blinking

RE: Programming Raytac MDBT40 (nRF51822 based BLE module)

MartinBL — Sun, 01 Nov 2015 09:42:58 GMT

Is this problem related to this case which is solved?

RE: Programming Raytac MDBT40 (nRF51822 based BLE module)

i_am_trying — Sat, 24 Oct 2015 20:41:32 GMT

i'm using the MDBT40 and all is working. I have gotten into to work w/ the LFCLKSRC you used. I have programmed using nRFGo...but mostly program and debug from my mac using jlinkexe as well as the Jlink debugger within Eclipse. I have also gotten a BLE app i wrote on iOS to get characteristics from the MDBT40 - so all seems to be worked (well i have A LOT more testing to do :-) )...

Note: You do not need the pull down resistor. The nRF51822 has these resistors "built in"...

my thoughts are to try a far simpler app. Just blink an LED off a gpio to make sure the SWD lines are working through debug out, etc.