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Which MCU + BT/BLE for heart rate and ECG monitoring (from TI ADS1293)

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Victus

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I am working on a portable wireless heart monitor with Bluetooth interface. The idea is to measure ECG signals for at least 1 day straight and then transmit data to the Android device. According to my research I believe that TI's ADS family would probably be the most suitable for my case, specifically ADS1293, which is in short all-in-one ECG chip.

I am now searching for a suitable microcontroller with Bluetooth capability which would acquire the signals from ADS1293, save them to external flash memory and then transfer them to the phone over BT/BLE. The original idea was to work with Arduino, but then I came across SoC TI CC2640. It obviously looks really suitable for my case at first glance since it's dimensions are small and it also has low power consumption, but so does Nordic nRF52832. I've already searched all related forums for comparison between these two and people seem to prefer **broken link removed** a bit more over CC2640. However, TI already has a very similar project design like mine here. Code is already provided, but the project is designed with CC2541, which is not compatible with CC2640 though, but I suppose that this would still help with coding.

Since I basically don't have any previous experience with these platforms, I was wondering which MCU+BT/BLE would you recommend to me? An important factor here is also that the development process should be as cheap as possible since I am a student, so the price of debuggers, development boards and software should also be taken into consideration.
Should I rather choose any other MCU e.g. like RFdroid or would you have any other recommendations? I would really prefer a well supported MCU for faster development process and quicker learning curve.

Thanks for help and any suggestions in advance.
 

I am working on a portable wireless heart monitor with Bluetooth interface. The idea is to measure ECG signals ..

I am now searching for a suitable microcontroller with Bluetooth capability which would acquire the signals from ADS1293
.......
The original idea was to work with Arduino, An important factor here is also that the development process should be as cheap as possible since I am a student, so the price of debuggers, development boards and software should also be taken into consideration.

...
Should I rather choose any other MCU .

If cost of development is to be considered for these one off product , Arduino is the best choice over others in all aspects.
 

Forget about arduino. It is a toy, not for serios projects.
For storing data best choice is SDHC card. So your mcu should have an SDIO interface. It should be enough powerfull to operate Fat file system and take less power from battery. So I recomend you to take a look at STM32L series. A lot of examples available in web for this mcu, it is cheap and most popular.
 

I am more concerned about Arduino because of it's size and power consumption. Although this is only a school project, I just though that if there is a chance, I would be nice to have it as small as possible and also to power it up for at least 1 day with a battery pack. Arduino is pretty big and I am also not sure if the batteries would suffice.

Why would you recommend STM32L for example over CC2541 or CC2640? How about BlueGiga BLE series such as BLE113, I have heard some positive opinions on it? It looks very decent, but the DKBLE Development Kit costs about 200 $ which is quite a lot and I suppose I cannot do really anything without it, right?
 

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