How to enable Minimum Block Request ?

[Jiuping Li]

Hi,

To support the large and dense networks we are building, I need my network coordinator to be able to throttle OTA packets to not completely overtake the network’s bandwidth and cause dropped data packets.To achieve this, I use the Minimum Block Request and Dynamic Block Request option for Zigbee OTA. For the end device to support this feature, I need the Minimum Block Request Period attribute enabled.But I don't know how to operate it? I haven't found any relevant examples.

[Edvin]

Hello,

I have not noticed that attribute before. I don't think it is used in any examples. What SDK version are you using? (NCS or nRF5 SDK? And what release version?)

BR,
Edvin

[Jiuping Li]

Minimum block request sets the packet polling rate for the end device. This is a requirement for devices on zigbee network. The coordinator does set how many simultaneous updates at a single time, but does not control how fast the end device asks for OTA packets, which is why the minimum block request is needed.

[Edvin]

I see. I will check with our Zigbee team if we have implemented this attribute, or if it needs to be done from scratch. Alternatively, if there is any other way to control the speed of which the DFU packets are being sent. I don't know what throughput your (the customer's) network is facing, but as you are probably aware, there should be retransmission on lost packets (in attributes where it is enabled). But you are seeing a difference when the DFU packets are being transmittet? (I thought they were already transmittet through a fairly slow speed).