硬件评估

[chuzhaonan]

我想了解一下，NRF52840作为无线组网的时候相邻设备最大接入距离是多远？最大能接入多少个设备？

[MartinBL]

Hi,

I don't understand what those symbols mean, but google translate says it is Chinese and translates it to:

"I would like to know how far the maximum access distance of neighboring devices is when NRF52840 is used as a wireless network. How many devices can I access at most?"

Q1) maximum access distance:
This depends on your environment, network protocol, and device configuration. You will get better range in an open field (line of sight) than you will inside a building for example. Please refer to these two blogs: 
Testing Long Range (Coded PHY) with Nordic solution 
Exploring Bluetooth 5 - Going the Distance

Q2) How many devices can I access at most?
That also depends on your chosen network protocol. By using BLE Mesh, Thread, or Zigbee you can have thousands of devices in a single network. If you go for Bluetooth low energy then a single device can connect to 20 other devices. 

[chuzhaonan]

Could  you provide two NRF52840 demo boards for me to test?

[MartinBL]

Hi,

For sample requests please contact our regional sales manager for your area. If you don't know who that is please send me a PM and I'll give you his details. 

[chuzhaonan]

I don't known who is my area sales manager. My address is Hangzhou, Zhejiang, China.

The end device of this series can also be used as a router, the router can also be used as an end device, and the router can also act as a co-ordinator?

[MartinBL]

Please refer to this documentation: Node Roles and Types.