Something with nRF52832

RE: Something with nRF52832

Wwing — Sat, 07 Mar 2020 09:25:08 GMT

Hello Bjorn:

Excuse me，Have another questions;

1.Can the ESB protocol call the frequency hopping of Gazell? Is there a corresponding description and source code?

2.Can the system clock be output to the specified pin?

RE: Something with nRF52832

bjorn-spockeli — Wed, 19 Feb 2020 09:09:51 GMT

Happy to help.

RE: Something with nRF52832

Wwing — Wed, 19 Feb 2020 07:54:36 GMT

Ok, I got it, thank you very much

RE: Something with nRF52832

bjorn-spockeli — Wed, 19 Feb 2020 07:48:46 GMT

We did a test with the nRF52840, in 2018 where we used the 1Mbps PHY with the RADIO transmitting at 0dBm. We managed to maintain the link over 681.90m

see https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/testing-long-range-coded-phy-with-nordic-solution-it-simply-works-922075585.

The sensitivity of the nRF52840 RADIO is more or less the same as the nRF52832 RADIO in 1M PHY mode so the results are comparable.

Note that the signal strength at this range is very low, about -93dBm so for a actual product i would recommend having some headspace, e.g. 5 dBm above the sensitivity of the RADIO.

RE: Something with nRF52832

Wwing — Wed, 19 Feb 2020 03:24:48 GMT

Hi bjorn:

thanks So I want ask that How long the distance can nrf52832 transmit upto the maximum TX output power in an open and unobstructed and non interference environment? Is there any measured data？

RE: Something with nRF52832

bjorn-spockeli — Tue, 18 Feb 2020 13:42:21 GMT

[quote user="Clark-kent"]1.How many meters can nRF52832 at the nRF Radio 2.4G bands up to the maximum TX output power(4dBm)? And how many the BLE radio ?[/quote]

That depends on the environment that its operating in, e.g. if its outdoor with clear line of sight or if its indoors with lots of obstacles and interference. Did not understand the last question.

[quote user="Clark-kent"]2.In this case,What is the transmission rate in this case?[/quote]

Do you mean the nRF52832 transmission rate? The on-air rate is 1Mbps, but the actual Link Layer throughput will vary depending on the method used to transmit the data, e.g. Write command, write request, notification etc, see Bluetooth Low Energy data throughput

RE: Something with nRF52832

Wwing — Tue, 18 Feb 2020 11:19:00 GMT

Hi,Bjorn;

thanks a lots, another questions:

1.How many meters can nRF52832 at the nRF Radio 2.4G bands up to the maximum TX output power(4dBm)? And how many the BLE radio ?

2.In this case,What is the transmission rate in this case?

RE: Something with nRF52832

bjorn-spockeli — Mon, 17 Feb 2020 12:45:08 GMT

Hi Cfsediej,

[quote user=""]1.So how can I increase transmission withou improving TX power As for the transmission distance of nRF52832, apart from improving the TX power, what is the better way to improve the transmission distance? At present, I use ESB protocol. The transmission frequency is 4 dBm, and 2.45G frequency band transmits 16K, 16bit data[/quote]

On the nRF52832 there is not much you can do to improve the range besides increasing the TX output power. On the nRF52840, nRF52833 and nRF52811 there is are 125 kbps BLE mode and 500 kbps BLE mode with better RX sensitivity, see Receiver operation in the nRF52833 Product Specification.

[quote user=""]2.In the mode configuration of Radio, there are nRF_ 2Mbit and BLE_2Mbit. What is the difference between these two modes?[/quote]

There are several differences w.r.t to the two 2Mbit modes, including Frequency deviation, RX selectivity, RX intermodulation, Adjacent Channel Transmit Power and Receiver sensitivity , see the Electrical specification section in the nRF52832 Product specification.

Its mainly the RX sensitivity that affects the range and as you can see below, the BLE radio modes have better sensitivity than the nRF Radio modes.

Symbol	Description	Typ.	Units
P_RX,MAX	Maximum received signal strength at < 0.1% BER	0	dBm
P_SENS,IT,1M	Sensitivity, 1Msps nRF mode¹	-93	dBm
P_{SENS,IT,SP,1M,BLE}	Sensitivity, 1Msps BLE ideal transmitter, <=37 bytes BER=1E-3²	-96	dBm
P_{SENS,IT,LP,1M,BLE}	Sensitivity, 1Msps BLE ideal transmitter >=128 bytes BER=1E-4 ³	-95	dBm
P_SENS,IT,2M	Sensitivity, 2Msps nRF mode⁴	-89	dBm
P_{SENS,IT,SP,2M,BLE}	Sensitivity, 2Msps BLE ideal transmitter, Packet length <=37bytes	-93	dBm
P_{SENS,DT,SP,2M,BLE}	Sensitivity, 2Msps BLE dirty transmitter, Packet length <=37bytes	-93	dBm
P_{SENS,IT,LP,2M,BLE}	Sensitivity, 2Msps BLE ideal transmitter >= 128bytes	-92	dBm
P_{SENS,DT,LP,2M,BLE}	Sensitivity, 2Msps BLE dirty transmitter, Packet length >= 128bytes	-92	dBm