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51822 development

JJ26

Hello, I have soldered up a 51822 and I am trying to connect it with an EmStat pico and get measurements. I am not sure how to program the chip and get it discoverable with the PsTouch app. The 51822 connects with a debugger but does not connect with the other apps. I can connect it with an Ardunio MKRzero and program from there but I'm not sure how to get it started.

  • 0

    Hi 

    Any reason why you are using the nRF51822, and not a newer device like the nRF52832 or the nRF5340? 

    If you are just testing things out that is fine, but if you plan to make a product for mass production then the nRF51822 is not recommended. 

    As for connecting to the EmStat Pico it is limited what help we can provide with this. I assume you have checked out the documentation they have available on their website?
    https://www.palmsens.com/product/oem-emstat-pico-module/

    You could hook up the sensor to the nRF51822 over the UART interface, but you would need to develop some code for the nRF51822 to set up the UART interface and allow you to send/receive commands to/from the EmStat Pico. 

    The ble_app_uart example in the nRF5 SDK might be a good place to start, as it allows you to create a sort of BLE to UART bridge between an app on the phone and the UART interface on the nRF51 device. 

    Best regards
    Torbjørn

  • 0 in reply to ovrebekk

    Thank you for your comment. I am just starting out with BLEs and ordered the 51822 initially. I just got the 51832 as well and have started to work with that now. There are SDK files provided to set for measurements with the pico, could I upload them through an Arduino zero or uno with the UART interface using VS? I do not have much experience with programming, so my questions are a bit broad. Sorry for that. I am just not sure how to start the process. I know the chip on the 52832 comes blank, so what would I need to do to set up an initial connection with a phone and how would the debugging and UART setup look? Is the UART setup just connecting the RX and TX pins?

  • 0 in reply to JJ26

    Hi 

    I don't know how to set up the EmStat pico device, for that you would have to contact PalmSens. 

    If they can tell you what the communication interface is between the pico and the host device, then I will try to help integrate this with the nRF52832 development kit. 

    The ble_app_uart example is documented here. The documentation states that you should use it with the nRF Uart app for Android or iOS, but this is no longer the case. Instead you should use it with the nRF Toolbox app for Android/iOS.  

    With this app you can configure text commands that will be sent when you press a button in the app. Up to 9 buttons can be configured, and you can set the exact string value for each command. 

    Any received data will show up in the app interface. 

    By default the ble_app_uart will connect the UART to a set of standard pins which are fed through the programming chip back to the PC over USB, so that you can view the UART data in a terminal on the PC. 

    Still, the UART pins will also be available on the pin headers, so that you can connect them to other boards. 

    Please note that unless the pico is running at the same voltage level you will need a level shifter between the two boards, to ensure that the UART pins run at the same voltage.

    Best regards
    Torbjørn

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