CCS/LAUNCHXL-CC2640R2: How to send string from CC640 via BLE

Abhishek Shrivastava

Part Number: LAUNCHXL-CC2640R2
Other Parts Discussed in Thread: CC2640

Tool/software: Code Composer Studio

Hi,

I have been trying to send a string from CC2640 Launchpad to Android Application via BLE using a simpleBLEperipheral example. Every time I try sending a string, the value received on the Android application is different. The code used by me is attached below.

static void SimplePeripheral_performPeriodicTask(void)
{
   char* valueToCopy;

   valueToCopy = "ABC";
 

    SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR2, sizeof(char*),
                               &valueToCopy);
}

over 6 years ago

0 Sean2 over 6 years ago

TI__Mastermind 33460 points

Hello,

The code you have posted will not work to send a string.

This is because char2 in the simple profile is defined as a uint8_t or "byte" type.

static uint8 simpleProfileChar2 = 0;

Additionally, setting a string value using sizeof(char*) is not recommended as sizeof(char*) is not the length of the string but instead is the length of the pointer to the string. To get the length of a string you need sizeof("ABC")

Note that the project_zero application has a characteristic that supports sending strings.

http://dev.ti.com/tirex/explore/node?node=AO6uwC1e0HVJYcMayVIvhw__krol.2c__LATEST

See data_service

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CCS/LAUNCHXL-CC2640R2: How to send string from CC640 via BLE