Cannot get more than 3 Bluz's to connect through gateway


#1

I am trying to connect 8 Bluz’s through a gateway but I can’t get more than 3 to work. Are there any known issues that updated firmware would correct?


#2

There is currently a limit of 3 in the latest firmware. This has to do with the fact that the Photon currently doesn’t support more then 5 socket connections, so it can only handle 3 bluz DK (1 socket used by the Photon for cloud connectivity, 1 socket used by the nrf51 gateway for cloud connectivity, leaving 3 for bluz DK)

We have some feedback from Particle on a possible work-around, if it works then we may have to issue special firmware for the Photon for the time being. I will try and get this tested and confirmed as soon as possible.


#3

If I have two gateways close to each other. Will 6 Bluz’s be able to connect? Or will there be problems with the Bluz’s trying to figure out which gateway to connect with?


#4

Yes, that will work. The gateways initiate the connection to a bluz DK, so you can use multiple and thee DK’s will just randomly attach to one gateway or the other.


#5

Cool. Thanks. If you need someone to help test out the workaround from Particle I am all set to try it out!


#6

Is the limit still at 3 Bluzs connecting through a gateway? The Order pages states that 8 can connect to the Cloud through a gateway.


#7

Yes, the limit is still 3.

Do you have an immediate need for more? This hasn’t been a really big issue for anyone yet, so we haven’t pushed to get it increased. Please let me know if that is different for you.


#8

@eric Add me to the list of wanting more!


#9

Yes, it would be very nice to spread across more DK boards the cellular fees, the labor/hassle of connecting a gateway to a WiFi network, and the need to find AC power for the gateway. I’d like to see 5 connections but 8 would be better.

It would be less confusing if you would remove the “Connect up to 8 Bluz DK boards to the cloud” on your Order page.

Thanks!


#10

I would also like to have more than 3 dk connected to one gateway, any plans on fixing that?


#11

Yes, it is planned. We are waiting on changes from the Particle side, notably: https://github.com/spark/firmware/issues/1292


#12

@eric

Hi there. I am facing the same issue - unable to connect more than 3 DKs to a shield at a time. I am using local communication between the DK and the shield and using an Electron to connect the shield to the cloud. Has the limit increased to 8 yet? I have an immediate need for it. :frowning:

Thank you.


#13

We have a solution that we never rolled out as a GA feature. The limit is 6 now, that is as far as we have tested. If you want to email us, I can send you the firmware and instructions to load it.


#14

Hi Eric, do you think it would be cool for those future brave souls that need this improvement if that info was available in a topic in this forum (with a big disclaimer about risks on top)?
Thanks
Gustavo.


#15

Gustavo, I’m glad you bring it up. Even though I don’t have more than 3 DKs, I tagged this thread so I would start bugging Eric for the instructions later on. I plan on having a fourth DK online around January.

Eric, since the docs say the gateway supports 8 DKs, can we have something on GitHub that explains the risks and let us work around the limitations?

Thanks,
Pescatore
Edit: I typed BK instead of DK:blush:


#16

Yes, I will publish this. The risks at this point are mostly mitigated for 6 devices. That works just fine, and I will roll this out.

Going to 8 would potentially be risky from a RAM usage perspective. Each connection requires its own buffer and there is limited RAM on the nRF51. That isn’t aupported yet, but could be possible.


#17

Emailed. Thanks, Eric.