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nRF51822 - Tryout of mbed sample code on EK board

Hi guys, I'm curious whether or not i can try the mbed platform on the EK board. The circuit of the mbed kit and the EK look pretty similar. All the LEDs and buttons are connected to the same GPIOs, even the interface with the Atmel chip are similar (SWDIO, SWDCLK, UART interface). I was able to download the Heart Rate mbed demo to the EK, the LED0 is able to blink, but the nRF Utility app on Android can't detect it at all. The Master Control Panel prog, though, can detect adv packets from the board, but i can't connect to it. It popped up this message: "Lost connection to device. Reason: BTLE_CONN_FAILED_TO_BE_ESTABLISHED ... SERVER: Received Link Loss" I was going over the library code for mbed platform and couldn't find anything unusual. By the way, i used nRF Go Studio to erase the whole chip and downloaded the compiled hex file to the chip (as far as i understand, the compiled hex file is already merged with Softdevice library). So i was wondering if it's is possible at all to try this mbed thing on the EK?

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