/**
* Initate the read of the characteristic in input.
*
* The completion of the operation will happens in when_characteristic_read()
*/
void read_characteristic(const DiscoveredCharacteristic &characteristic)
{
printf("Initiating read at %u.\r\n", characteristic.getValueHandle());
ble_error_t error = characteristic.read(
0, as_cb(&Self::when_characteristic_read)
);
if (error) {
printf(
"Error: cannot initiate read at %u due to %u\r\n",
characteristic.getValueHandle(), error
);
stop();
}
}
/**
* Initiate the discovery of the descriptors of the characteristic in input.
*
* When a descriptor is discovered, the function when_descriptor_discovered
* is invoked.
*/
void discover_descriptors(const DiscoveredCharacteristic &characteristic)
{
printf("Initiating descriptor discovery of %u.\r\n", characteristic.getValueHandle());
_descriptor_handle = 0;
ble_error_t error = characteristic.discoverDescriptors(
as_cb(&Self::when_descriptor_discovered),
as_cb(&Self::when_descriptor_discovery_ends)
);
if (error) {
printf(
"Error: cannot initiate discovery of %04X due to %u.\r\n",
characteristic.getValueHandle(), error
);
stop();
}
}
void triggerToggledWrite(const GattReadCallbackParams *response) {
if (response->handle == ledCharacteristic.getValueHandle()) {
printf("triggerToggledWrite: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len);
for (unsigned index = 0; index < response->len; index++) {
printf("%c[%02x]", response->data[index], response->data[index]);
}
printf("\r\n");
uint8_t toggledValue = response->data[0] ^ 0x1;
ledCharacteristic.write(1, &toggledValue);
}
}
void triggerRead(const GattWriteCallbackParams *response) {
if (response->handle == ledCharacteristic.getValueHandle()) {
ledCharacteristic.read();
}
}