The band is defined in the Bluetooth Core Specification consists of 37 data communication channels and three advertising channels for Device Discovery. The latter are allocated in non-consecutive parts of the spectrum to prevent interference from concurrent activities in the ISM Band. Specifically, a Bluetooth Low Energy device can advertise on channels 37, 38, and 39 which correspond to frequencies of 2.402 MHz, 2.2426 MHz, and 2.480 MHz respectively. The devices can advertise successively on all enabled channels.
By default, all channels are enabled with the assignment .channel_map = ADV_ALL_CHNLS_EN. To force the Bluetooth Low Energy device to use only one channel, for example channel 37, use the assignment. channel_map = ADV_CHNL_37_EN. Please check user_adv_conf configuration structure.
This is not possible – as already mentioned the BLE devices can advertise on channels 37, 38, and 39 which correspond to frequencies of 2.402 MHz, 2.2426 MHz, and 2.480 MHz respectively.
嗨Firefox2005,
The band is defined in the Bluetooth Core Specification consists of 37 data communication channels and three advertising channels for Device Discovery. The latter are allocated in non-consecutive parts of the spectrum to prevent interference from concurrent activities in the ISM Band. Specifically, a Bluetooth Low Energy device can advertise on channels 37, 38, and 39 which correspond to frequencies of 2.402 MHz, 2.2426 MHz, and 2.480 MHz respectively. The devices can advertise successively on all enabled channels.
By default, all channels are enabled with the assignment .channel_map = ADV_ALL_CHNLS_EN. To force the Bluetooth Low Energy device to use only one channel, for example channel 37, use the assignment. channel_map = ADV_CHNL_37_EN. Please check user_adv_conf configuration structure.
Thanks, PM_Dialog
Hi,
thanks for the reply.
So there is absolutly no way tohacksomething into the firmware for some experimental tests on different bands? For example 2.401 MHz.
Best regards
嗨Firefox2005,
This is not possible – as already mentioned the BLE devices can advertise on channels 37, 38, and 39 which correspond to frequencies of 2.402 MHz, 2.2426 MHz, and 2.480 MHz respectively.
Thanks, PM_Dialog