Description
Howto:
get the list from https://www.bluetooth.com/specifications/gatt/descriptors
Characteristic Aggregate Format org.bluetooth.descriptor.gatt.characteristic_aggregate_format 0x2905 GCD
Characteristic Extended Properties org.bluetooth.descriptor.gatt.characteristic_extended_properties 0x2900 GCD
...
put it to regex converter
reg exp: (.+) \t(.+) \t(.+) \tGCD
Sub: {\3,"\1"},
and get
{0x2905,"Characteristic Aggregate Format"},
{0x2900,"Characteristic Extended Properties"},
...
Add struct, head and end:
typedef struct {
uint32_t assignedNumber;
std::string name;
} gattdescriptor_t;
static const gattdescriptor_t g_descriptor_ids[] = {
{0x2905,"Characteristic Aggregate Format"},
{0x2900,"Characteristic Extended Properties"},
{0x2904,"Characteristic Presentation Format"},
{0x2901,"Characteristic User Description"},
{0x2902,"Client Characteristic Configuration"},
{0x290B,"Environmental Sensing Configuration"},
{0x290C,"Environmental Sensing Measurement"},
{0x290D,"Environmental Sensing Trigger Setting"},
{0x2907,"External Report Reference"},
{0x2909,"Number of Digitals"},
{0x2908,"Report Reference"},
{0x2903,"Server Characteristic Configuration"},
{0x290E,"Time Trigger Setting"},
{0x2906,"Valid Range"},
{0x290A,"Value Trigger Setting"},
{ 0, "" }
};
make it available by function:
std::string BLEUtils::gattDescriptorToString(uint32_t descriptorId) {
gattdescriptor_t* p = (gattdescriptor_t *)g_descriptor_ids;
while (p->name.length() > 0) {
if (p->assignedNumber == descriptorId) {
return p->name;
}
p++;
}
return "";
} // gattDescriptorToString
to public: in BLEUtils.h:
static std::string gattDescriptorToString(uint32_t descriptorId);
use it in code (not nice, but working):
#include "BLEUtils.h"
...
String gattdesc_str = "00002901-0000-1000-8000-00805f9b34fb";
uint32_t gattdesc = strtol(gattdesc_str.substring(0, 8).c_str(), NULL, 16); //"00002901" -> 0x2901
Serial.println( String("Descriptor: ") + BLEUtils::gattDescriptorToString(gattdesc).c_str()); //Characteristic User Description
Peter