https://devzone.nordicsemi.com/f/nordic-q-a/2680/how-to-send-data-from-pic-controller-to-nrf51822-using-uartHello all, I want to send some sensor data( collected by Pic controller) to other BLE client(may be a phone) using nrf51822 via UART. Can somebody suggest how to communicate using UART? Do I need to run UART program on both the controller and the nrf51822en-USTelligent Community 13Wed, 04 Jun 2014 12:31:54 GMThttps://devzone.nordicsemi.com/thread/10513?ContentTypeID=1Wed, 04 Jun 2014 12:31:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1306bda3-b4e3-4203-a652-4ba3ec793ae5John<p>We developed an application where a PIC gathers sensor data and sends it via UART to the nRF51822 when a host is connected and requests the data. It is probably similar to the example cited by LKH. A couple of things we learned along the way:</p> <ol> <li> <p>Because the Soft Device can interrupt the UART transaction HW flow control was necessary to prevent losing data.</p> </li> <li> <p>We needed the radio to be able to wake up the PIC with a break character which the nRF UART cannot generate directly. However the support folks at Nordic were able to show us how to generate a break by disconnecting the UART TX from the GPIO pin and holding it low for enough time to generate a break to the PIC</p> </li> <li> <p>If your application is sensitive to power consumption, disable the UART on the radio when you are not using it as it does burn a surprising amount of power while idle.</p> </li> </ol><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/10512?ContentTypeID=1Wed, 04 Jun 2014 10:27:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a3784671-f5fa-4fe3-aaef-5ce90d9e509bLKH<p>Hi, In your case, S110 Softdevice is suitable. There is an example of nRF51822 with ble_UART_app (nrf51822\board\pca10001\s110\experimanetal\bek_app_uart) When you send data from pic to nRF with UART, it sends data via BLE with nus(Nordic Uart Service;nordic custom service).</p> <p>Check the example.</p><div style="clear:both;"></div>