nrf52 2.4Ghz project

RE: nrf52 2.4Ghz project

Hung Bui — Tue, 12 Dec 2017 08:09:10 GMT

Yes, they can talk to each other

RE: nrf52 2.4Ghz project

pavan — Thu, 07 Dec 2017 09:05:24 GMT

Hi Sir,

Thanks for your information will go through that.

another query is can we use nrf51 dongle as receiver (which is connected to system) and nrf52810 as transmitters(slaves)?.

please confirm.

thanks in advance pavan

RE: nrf52 2.4Ghz project

Hung Bui — Wed, 06 Dec 2017 22:13:08 GMT

Have you had a look at the documentation ? You will receive NRF_ESB_EVENT_TX_SUCCESS event when the PTX receive an ACK. Please also check the example project in the SDK as well.

RE: nrf52 2.4Ghz project

pavan — Tue, 05 Dec 2017 10:48:26 GMT

Hi ,

I checked and i am able to receive the pay load data. but now how and where to check the whether ACK is received after receiving data?

RE: nrf52 2.4Ghz project

Hung Bui — Wed, 15 Nov 2017 14:56:09 GMT

How did you verify it work? Have you ever looked into the code ? Look for NRF_ESB_EVENT_RX_RECEIVED event in the PRX main.c

RE: nrf52 2.4Ghz project

pavan — Wed, 15 Nov 2017 14:46:55 GMT

Hi , Adding to above query i got the ESB examples in SDK and its working . but now my query is how and where i can see what data transmitter(PTX) is transmitting or what data receiver is receiving. is it possible to see in terminal?

Thank you

RE: nrf52 2.4Ghz project

Hung Bui — Wed, 15 Nov 2017 14:35:33 GMT

Please have a look at the ESB example provided in our SDK.

By default it was made for 1 PTX and 1 PRX. But you can modify the example to test with several PTXs and add the ID inside their payload.

The addressing is explained in the user guide of the protocol in the link I sent above.

RE: nrf52 2.4Ghz project

pavan — Wed, 15 Nov 2017 13:31:55 GMT

Hello , Can i have any example codes on ESB so that i can try with some 3-4 nodes and get ready with demo. please provide more information about addressing of each node.

thanks in advance Pavan s k

RE: nrf52 2.4Ghz project

pavan — Wed, 15 Nov 2017 13:16:10 GMT

Hello Sir, Thank you will get back

RE: nrf52 2.4Ghz project

Hung Bui — Wed, 15 Nov 2017 11:39:24 GMT

Hi pavan,

With 70 nodes, it's correct that it's not a good idea to use BLE.

I would suggest you to try ESB (our 2.4GHz proprietary protocol). You can have a look at the userguide here. It's a star network and only support up to 8 concurrent slave. However, in your case you can use the same pipe for all nodes. So basically the PRX (the host) listens all the time and all the nodes send to same radio address. Each node will put its ID into the payload.

When a button pressed, a node will start transmitting let says 10 times, with some random delay between them. The random delay is to avoid congestion.

Depends on the application, you can decide if the PRX need to send ACK back to the PTX or not, up to the application. The ACK packet will have the same address for all node, but there will be an ID in the payload of the ACK packet. Using ACK you can avoid the node have to re-send packets many times.

Another option for you is to our Bluetooth Mesh. It would be useful in the case that it's a big class room that the PRX might not be reached directly from the node. The disadvantage is a packet will be rebroadcasted by all nodes causing more traffic on the air.