How to achieve 2Mbps data rate?

RE: How to achieve 2Mbps data rate?

RK — Thu, 25 Jun 2015 05:54:09 GMT

Sorry brain entirely not working and I copied the wrong number from an entirely different mail about something else.

I was wondering what the theoretical overhead is - largest packet is 376us, full-sized non-ecrypted packets are 344us, smallest is 80us, you need one packet in each direction consecutively so that's 424us and that sends 20 bytes of data one-way. That leads to a theoretical max of 47kB/s. The requirement to end the connection event in time to let the radios switch cuts that down and it's further cut down by various implementations restricting the number of packets per connection interval and the min spacing between them.

It's not very fast, but it wasn't designed to be that fast.

RE: How to achieve 2Mbps data rate?

qoolink — Thu, 25 Jun 2015 05:21:50 GMT

With the best combination available it's about 0.128Mbps not .5Mbps?

RE: How to achieve 2Mbps data rate?

RK — Thu, 25 Jun 2015 03:08:56 GMT

There is no BLE with 'proprietary protocol', you're either using BLE, or you're not using BLE. BLE is defined over an underlying 1Mbps link, however the actual throughput after you take into consideration

The overhead of the protocol
The fact the link is half-duplex
The limitations in BTLE stacks (all of them) which restrict the number of packets which can be transmitted per connection interval
The limitations of various communicating devices which may limit how often devices connect
Whether you are writing packets requiring responses or writing without response and dealing with dropped packets.

This thread does a good job of summarising what's actually even possible

devzone.nordicsemi.com/.../

with the best combination available it's about .5Mbps

RE: How to achieve 2Mbps data rate?

Dave_couling — Thu, 25 Jun 2015 02:56:50 GMT

BLE is its own protocol. Proprietary or other protocol's like ANT are different

RE: How to achieve 2Mbps data rate?

qoolink — Thu, 25 Jun 2015 02:47:51 GMT

How can I obtain/get the BLE with “proprietary protocol” ? Does the BLE with 1Mbps/0.25Mbps data rates also need to use “proprietary protocol” ?

RE: How to achieve 2Mbps data rate?

qoolink — Thu, 25 Jun 2015 02:47:23 GMT

How can I obtain/get the BLE with “proprietary protocol” ?

Does the BLE with 1Mbps/0.25Mbps data rates also need to use “proprietary protocol” ?

RE: How to achieve 2Mbps data rate?

Dave_couling — Thu, 25 Jun 2015 01:54:10 GMT

If you are trying to get this thru-put with BLE it is not possible. 2Mbps is only possible with proprietary protocol