ANT reset pairing bit on master

[RobK]

I am working on a system where two nRF51 will communicate with use of the ANT protocol (S210). The master and slave must be paired after pressing a button on both sides. I want to use the pairing bit of the Device Type, so the slave knows to which master a connection should be made. An available master sets it's pairing bit to 1 and resets the pairing bit when it's connected to a slave. A slave only searches for a master with the pairing bit set.

The "ANT app note device pairing" tells me this: "The pairing bit can be reset on the master device while the channel is open." and "ANT resets the pairing bit automatically at the slave when it has successfully connected with the master."

But i can only find the function sd_ant_channel_id_set, where i can set the device type. But this function can't be used when the channel is already open. How can i reset the pairing bit on the master device without closing the channel?

Thanks in advance.

[testy]

When the slave tracks the master, pairing bit becomes irrelevant, as full channel ID is known after successful pairing process (master can clear this bit in next step to make himself invisible for pairing).

But this function can't be used when the channel is already open.

Did you try it?

I checked this with NRF_SUCCESS (S310 v2.0.1 and SDK 7.2.0), works as expected, else something like NRF_ERROR_INVALID_STATE should be returned.

[RobK]

According to devzone.nordicsemi.com/.../ and devzone.nordicsemi.com/.../, the parameters for an ANT channel can only be changed when the channel is closed. But i've tried to reconfigure an open channel and it seems you are right, it just works. Thanks!