nrf52840 ncp bit rate

Question

Hello everyone! 
 
 I have started to work with openthread recently, and now I have to build a mqttsn client into a stm32 uController. I'm doing that by using the spinel protocol between stm and a nrf52840. The nrf52840 is configured as NCP. The problem actually seems to be very simple: I just want to change the transmition speed to increase the module's range, but I couldn't find where i should change it inside the NCP's example file in the nRF5_SDK_for_Thread_and_Zigbee_2.0.0 (I'm programming the board using segger IDE, inside Windows 10 OS) 
 So I was hoping that someone here should know something :D Thanks for any help!

Edvin · Accepted Answer

Ah. It didn't quite add up, but I saw we discussed spinel and UART in one of your earlier tickets, so I assumed it was the same. 
 But unfortunately, no. It is not possible to change the bitrate of IEEE (which is what OpenThread uses). It is by default set to 250kbps using 2.4GHz, and this is included all the headers. You will see that the payload bitrate is lower than this. 
 
 The only option if you want to change the bitrate between two devices is to run e.g. BLE concurrently. BLE or even ESB (Enhanced ShockBurst, Nordic Proprietary radio protocol, which would require Nordic chips in both ends). This will however not increase the throughput of the network, only between these two nodes. 
 
 Best regards, 
 Edvin

nrf52840 ncp bit rate

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