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Hi all,
I'm wondering if it is possible for a BCM20737 chip to behave as a BLE master and slave at the same time.
I have done the following tests so far:
1. First of all I have created two applications, APP_X is BLE master and APP_Y is BLE slave.
APP_X (BLE master): contains GATT database, send advertisement, discoverable
APP_Y (BLE slave): no GATT database, non-discoverable, only scan for advertisement.
They can pair with each other and communicate successfully.
2. Then I want to let APP_Y(BLE slave) work as a master, and connect it with my phone (like a slave).
So I add another GATT database into APP_Y, make it discoverable and send its own advertisement.
if APP_Y is not connected to APP_X, I can successfully connect APP_Y using my phone, so it means APP_Y can work like a BLE master.
3. Here comes the problem:
(1) If I make APP_Y discoverable then start APP_X, even though APP_Y can receive APP_X's advertisement, the connection up event never occurs. So the BLE connection between APP_X and APP_Y can never be established.
Only when I make APP_Y non-discoverable, it can connect with APP_X successfully.
(2) If APP_Y is already connected with my phone, APP_Y can receive APP_X's advertisement, but connection up even never occurs as well.
This time even if I make APP_Y non-discoverable, it cannot connect with APP_X anyway.
From my test result, it seems that it is possible for a BCM20737 chip to be BLE master and slave at the same time, because the advertisement can be received without problem, but somehow the API blecen_Conn(HIGH_CONN, evt->wd_addr, evt->addressType); doesn't trigger the connection up event.
Could anyone tell me how to let BCM20737 chip to connect both a BLE master and a BLE slave at the same time?
Thanks
Jingdong
Solved! Go to Solution.
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This thread summarizes the Simultaneous Master/Slave feature: Additional master/slave questions on BCM20736/7 family
To investigate our support for Simultaneous Master/Slave, take a look at the hello_client and hello_sensor applications within the SDK.
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Yes, I have read that blog. But it doesn't answer my question.
Basically I know how to establish BLE connection between a master device and a slave device. And I have no problems to connect two slaves using one master.
However, the question is: Can a device be master and slave at the same time?
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This thread summarizes the Simultaneous Master/Slave feature: Additional master/slave questions on BCM20736/7 family
To investigate our support for Simultaneous Master/Slave, take a look at the hello_client and hello_sensor applications within the SDK.
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Thanks mwf_mmafe,
It is really nice to see BCM20737 can support simultaneous master/slave.
I will learn from the hello_client and hello_sensor applications in SDK and provide more reply later.