Programming nRF51822 QFAA without any DevKit?

[robonewbie]

Hi I'm looking forward to hear if I could program an nRf51822 QFAA without using the development kit/board. The chip I have currently is a N51822- S4AT, from Wireless Tag Technology which comes programmed with some AT command set to start with. I want to program it with a simple UART/Serial program with the S130 v1.0 softdeviceI have a Blackmagic probe (STM chip) that I used to erase the chip (arm-gcc) and load the s130 v1.0 hex from SDK 7/8/10 (tried all) and then use the mbed online compiler to generate a hex for UART application. But I couldn't see any data coming out through the serial port (I have tried both using a Serial software and logic analyser).

I have also read about 16Mhz and 32Mhz crystal could possibly affect the timing and not transmitting any packets/data out?

I could see the application on the nRf connect phone app and connect to it and send data and see the conversion of bytes in the log. But I couldn't see it on the serial port?

Please advice?

Thanks RN

[bjorn-spockeli]

Is this question related to this question ? Looking at images of the N51822- S4AT module I can see that it does not have the 32kHz crystal, so you will have to modify SDK examples to use the internal RC oscillator, see this answer.

[nar0909]

Hi, Thanks for the excellent feedback. Yes, I was trying to find a quick response but the website keeps blocking my question and doesn't allow me to find a solution ='( But sure will check out and let you know how it went.... Cheers