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CC2541 Enable Notifications via BTool for Gyroscope

Other Parts Discussed in Thread: CC2541, CC2540

Hello everyone,

I have a CC2541 SensorTag and a USB CC2540 Dongle, and I want to enable the gyroscope plus its notifications. This says theCharacteristic Value Handle to enable the gyroscope is 91, so I typed 0x0091 into the form and set 01:00 into the value-field. But I get INVALID_HANDLE errors. Do I have to modify the firmware and if yes, could you give me some hints how to do so?

Thanks in advance