![]() ![]() The latency is on average 15ms per hop and the power consumption of the nodes is largely determined by the receive current (if everything is configured for minimum latency which means radio is on close to 100% of the time). The network latency and node power consumption depends on how much of the time is spent in scanning and advertising. In order to avoid excessive and unnecessary network traffic/flooding, there are mechanisms to reduce traffic, such as adjustable scanning and advertising intervals and a time-to-live (TTL) counter, which defines how many times a packet can be broadcasted. A simple, but effective way of spreading information across the mesh network with no single point of failure. This functionality is not implemented in v0.9.1 but will be added at a later stage.) Bluetooth mesh relies only on scanning and advertising, so it means that every received packet is broadcasted by relays, until the packet is received by the destination node (a so-called managed flooding mesh). (To support battery powered nodes the Low Power nodes and Friend nodes are defined in the Bluetooth SIG specification. A relay node has the additional capability of re-broadcasting messages. The below figure is showing a Bluetooth mesh network, which can be created with the nRF5 SDK for Mesh.Īll nodes in a network are capable of sending and receiving messages. From a holistic point of view, mesh enables Bluetooth to expand its range/coverage and increases the # of nodes in the network and enables many-to-many (m:m) communication. With this update to Bluetooth, there are significant changes and many new concepts to learn for developers and product makers. What is Bluetooth mesh? The mesh capability is a significant update and enables a radical new approach to making Bluetooth applications. This first (v0.9.1) release is packed with new features and concepts for Bluetooth. That should make the DK board show up in the studio and you should be able to erase and program it.The day after the Bluetooth SIG announced the 1.0 spec of the Bluetooth mesh we are happy to announce the nRF5 SDK for Mesh for our nRF51 and nRF52 Series SoCs. ![]() ![]() Just open the nRFgo Studio and press help: Check for updates and download the lastest version and run the install. If the nRFgo Studio does not work for your DK board, you might have to update it. and the SW Device should have a device listed), then perhaps you need to download a newer segger software.Īfter installing this, try again and see if the device appears. when you choose Options for Target: Debug tab: Use: J-LINK / J-TRACE Cortex: Settings: Port SW (the device should show up as J-Link / J-Trace Adapter SN: SERIALNUM. If the device (having the JLink firmware installed) is not showing up in Keil, ie. Wait until the transfer is complete, and then power cycle the board (turn off and on again without holding the reset button). the nRF51-DK-J-Link-IF.bin file) into the mounted bootloader drive on the connected computer. To swap the Interface MCU FW, drag and drop the Interface image (ie. to enter bootloader mode, press the boot/reset button (SW5) while the board is powered until the LED (LD5) starts to blink). You need to be logged in and also have the product key added for your nRF51-DK board so that the interface firmwares are available to you for downloading (nRF51-DK-J-Link-IF, and nRF51-DK-mbed-IF).Īfter you have acquired the interface firmware (nRF51-DK-J-Link-IF.bin), you can follow the approach you used earlier to swap back to the J-Link firmware.įollow the approach in section 4.1 "IF Boot/Reset button" on page 8 to enter the bootloader (ie. One approach you can follow is to download the J-Link OB image from the website: If I have understood it correctly, you want to switch back to the J-Link interface firmware on your nRF51-DK board? ![]()
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