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LE UART Friend as Central?
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LE UART Friend as Central?

by gonzob on Wed May 20, 2020 11:49 pm

Is ti possible to use the LE UART Friend as a central? It is obviously able to be a peripheral.

If so, is there a guide somewhere?


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Joined: Sat May 16, 2020 9:20 pm

Re: LE UART Friend as Central?

by ChliHug on Fri May 22, 2020 12:31 am

According to the FAQ for the Bluefruit LE UART (, this is not possible with the Adafruit firmware:

Can my Bluefruit LE module connect to other Bluefruit LE peripherals?
No, the Bluefruit LE firmware from Adafruit is currently peripheral only, and doesn't run in Central mode, which would cause the module to behave similar to your mobile phone or BLE enabled laptop.

If you required Central support, you should look at the newer nRF52832 based products like the Adafruit Feather nRF52 Bluefruit LE, which contains a SoftDevice which is capable of running in either Central or Peripheral mode. The nRF518322 based products (such as the one used in this learning guide) are not capable of running in Central mode because it isn't supported by the SoftDevice they use, and it isn't possible to update the SoftDevice safely without special hardware.

It's apparently possible to flash a modified firmware with a newer SoftDevice version, but Adafruit can't publish the source code for their firmware because of copyright reasons making the choice to go for the newer chips easier. ;)

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Joined: Sun Feb 16, 2020 4:54 pm

Please be positive and constructive with your questions and comments.