Unable to send data to custom APP but connection is happening using DA14531

Question

Hi, 
 I'm using DA14531. In SDK, I'm using "ble_app_peripheral" under Ble_examples. I'm using Uart and BLE. what ever the data coming through BLE, I need to send it through UART and what ever the data coming from UART, I need to send it through BLE to the app 
 2. I'm using "Renesas Smart Bond APP", then under "Long Value" characteristic User Description, I'm sending data continously to my DA14531 and displaying in PC through UARt. but from my DA14531, If I send data to "LED State" characteristic, then the "Long Value" characteristic is receiving data and it is dsiplaying for first time. but if I send again some new data of same length, then it is not receiving. 
 3. For enable the uart receiving call back, I need to tell the no of bytes to be receive. If I send less than that, then can I get the receive call or not in DA14531? 
 
 Firmware: https://www.mediafire.com/file/ny34tp57eup207k/DA145xx_SDK.rar/file

kumar · Answer

Hi, 
 My goal is to send data from PC to android APP through DA14531 and vice versa. so in DA14531 sdk, I'm using "ble_app_peripheral" under Ble examples. I tested my DA14531 code with " Renesas Smart Bond APP " and with my own Android App. I'm using 1st Unknown Service (18424398-7cbc-....). under this service, I'm using the Characteristic User Description "Long Value" (UUID: 772ae377-b3d2-....). 
 1. From " Renesas Smart Bond APP ", I'm able to send the data to PC continuously through DA14531. But if I send the data from PC to this APP, it is receiving first time only. if I send again new value of same length, the Renesas app is not receiving. 
 2. From my own Android APP, I'm able to send the data to PC continuously through DA14531. But if I send the data from PC to my own android APP, it is not receiving. I already enabled the notification for this Characteristic User Description in my android app. But I'm unable the identify what is the problem. 
 The following are the links for DA14531 code and my own android code 
 DA14531 code: https://www.mediafire.com/file/ny34tp57eup207k/DA145xx_SDK.rar/file 
 Android code: https://www.mediafire.com/file/jbztynbuvmwii73/connection_test1.rar/file

JH_Renesas · Answer

Hi Kumar, 
 There maybe Ram size limitation. We have successful cases for Translating image to printer by SPS SDK. 
 So I suggest you to using SPS SDK. it designed to fit this using scenario. 
 If you want keep on using the basic example for developing. Please find this tutorial for debugging: 
 Tutorial Dialog SDK 6.0.x Debugging &mdash; DA145XX Tutorial SDK Getting started (renesas.com) 
 BR, 
 JH_Renesas