5340 52840 nRF24. how should I choose?

[yoyou]

Hello,

I am designing a set of equipment, one to transmit voice and the other 200 to receive voice (One person speaks and 200 people listen). It is 8kByte/s low-quality audio, one-way communication, no response, and It is required to use the distance greater than 100m in the outdoor street environment. The transmitter can use a large antenna and high power.

question: what kind of chip can be used to achieve?
BLE mode 5340 or 2.4G mode (52840 + nRF24) or other?

i need idea,thanks.

Tips:

Connect SDK1.8.0 periodic_ sdv/periodic_ sync  run in 52840,easy to lose data, even within 1 meter.

LE AUDIO wiht 5340, now no SDK, and no specific date.

Best regards,

yuyou

[ovrebekk]

Hi

Do you have a sales contact (regional sales manager) in Nordic?

Questions regarding future releases and updates, such as those related to LE Audio, you can forward to them. 

If you have not been in touch with our sales group yet just let me know, and I will forward you the right contact details. 

Connect SDK1.8.0 periodic_ sdv/periodic_ sync  run in 52840,easy to lose data, even within 1 meter.

This sounds strange, at 1 meter you should not expect a lot of packet loss. How do you measure this?

Best regards
Torbjørn

[yoyou]

Hello,ovrebekk,

thanks for your reply,

i'm sorry for about follow line:

Connect SDK1.8.0 periodic_ sdv/periodic_ sync  run in 52840,easy to lose data, even within 1 meter.

it's my mistake,prepare the next data before send finish.

I've been in touch with the sales team , but they don't know technology.

our company has purchased a batch of 52840 for other production projects.

Now,it is a new project,

i've five 52840DK and two 5340DK and five nRF24L01 module.

One-to-many , one-way communication;

8kByte/s or 4kByte/s low-quality audio;

large antenna and high power;

distance greater than 100meter;

Technically, how should I choose? Or there's a better choice？

If possible, please discuss it with your team and get back to me.

thanks

Best regards,

yuyou

[ovrebekk]

Hi Yuyou

In general the nRF5340 is the best device for LE Audio, and our initial LE Audio tests are all based on this device. 

I will check internally if we are planning to support LE Audio for the nRF52 series as well, and I will let you know what I find out. 

In order to support distances greater than 100m you could use an RF front end on the transmitter side, to boost the output power to 10-20dBm (depending on region). Since the signal is one directional it should be sufficient to use a power amplifier on the transmitter side. If you use an LNA on the receiver side you could improve range even more, but this would increase the system cost significantly compared to just using a PA in the transmitter (since you have 200 receivers pr transmitter it is more important to optimize the receiver design for cost). 

I will also try to find out when we are planning to make the LE Audio code publicly available. 

yoyou said:

I've been in touch with the sales team , but they don't know technology.

Do you mean one of our regional sales managers, or did you talk to one of our distributors?
The Nordic Semiconductor sales group has got a very good technical understanding of our products, since they specialize on Nordic devices only (compared to distributors, which have to support devices from many different vendors). 

Best regards
Torbjørn

[yoyou]

Hello,ovrebekk,

thank you very much, the information you provide is very important to me.

As you said, i think the people I talked to were distributors.

   

Just a few more questions:

1.RF front end is only nRF21540? 

       has it been mass-produced yet?

2.As follow ,is this plan ok?

       transmitter :   nRF5340 + nRF21540 PA

       receivers:      nRF5340 + nRF21540 LNA

3.NCS1.8 or nRF SDK17, which is more suitable for this project?

       i've tay NCS1.8.0  periodic_adv+periodic_sync with

       non-connectable non-scannable undirected advertising set .

       but i have not find similar periodic_adv in nRF SDK17.

    

thanks

Best regards,

yuyou

[ovrebekk]

Hi Yuyou

1. Yes, the nRF21540 is in production. 

2. Yes, this setup should work fine. The nRF21540 has both a PA and LNA, and as such you can simply use this device on both sides. 

3. The nRF5 SDK does not support the nRF5340, so NCS is the only option. 

All future Nordic devices will require NCS, and new Bluetooth features will also be added to NCS only. 

Best regards
Torbjørn

[yoyou]

thank you very much,

i've got it.

[ovrebekk]

You welcome, I will consider this case resolved then