NRF52840 Proprietary 2 Mbps.

RE: NRF52840 Proprietary 2 Mbps.

Simonr — Mon, 28 Feb 2022 10:10:26 GMT

We only support the modes that are described in the PS. The radio does not have support for OOK modulation I'm afraid.

Best regards,

Simon

RE: NRF52840 Proprietary 2 Mbps.

Ted — Fri, 25 Feb 2022 01:04:31 GMT

Hi Simon,

The last question I did not describe is very clear. I need is a 1KHZ OOK signal modulated on a 2.4GHZ carrier. The 2.4GHz carrier is on if data is high, the 2.4GHz carrier is off if the data is low. It is OOK modulation instead of GFSK. Can NRF52840 achieve it? I will send 40-bit pattern 40-bit pattern [0xAA, 0xFE, 0xCA, 0xBB, 0xED].

Best wishes

Ted Wu

RE: NRF52840 Proprietary 2 Mbps.

Simonr — Thu, 24 Feb 2022 10:35:33 GMT

Hi Ted

The radio peripheral on the nRF52840 is a 2.4GHz transceiver, and can not output 1kHz if that's what you're asking. I guess you could do something with the PWM peripheral to generate the Manchester encoding data you'd like, and transmit that over the air using the radio. Unfortunately we don't have specific example projects doing exactly that, but in addition to the radio transmitter example, you could also check out the PWM driver example project.

Best regards,

Simon

RE: NRF52840 Proprietary 2 Mbps.

Ted — Wed, 23 Feb 2022 13:49:25 GMT

Hi Simon,

We want to generate 1 kHz OOK symbol rate, Manchester encoded (For a 0.5kHz bitrate) and 40-bit pattern – start with this one for now: [0xAA, 0xFE, 0xCA, 0xBB, 0xED].

Can make it by nRF52840 platform?

Thank you very much.

Ted Wu

RE: NRF52840 Proprietary 2 Mbps.

Simonr — Tue, 15 Feb 2022 08:40:40 GMT

Hi again

The contents of the package is printed in the NRF_LOG_INFO("The contents of the package was %u", (unsigned int)packet); line. As this is just a transmitter example, the packet is just a number based on what button(s) you have pressed. You will need to change this to contain whatever you'd like it to to fit your use case.

Best regards,

Simon

RE: NRF52840 Proprietary 2 Mbps.

Ted — Mon, 14 Feb 2022 09:16:10 GMT

Hi Simon,

I got an evaluation board of PCA10056. I flashed the project of the transmitter to the evaluation board and got the following information. I don't know what is the contents of the package. How to print the contents of package? I use the Teraterm to send out the UART message. Where can I get the data and print it out (UART data)? I want to know what data it sends. If I want to insert a package (like $RB9#), how to do it?

Best regards,

Ted Wu

RTT Message:

00> <info> app: Press Any Button
00>
00> <info> app: The packet was sent
00>
00> <info> app: The contents of the package was 2
00>
00> <info> app: The packet was sent
00>
00> <info> app: The contents of the package was 1
00>
00> <info> app: The packet was sent
00>
00> <info> app: The contents of the package was 4
00>
00> <info> app: The packet was sent
00>
00> <info> app: The contents of the package was 8

RE: NRF52840 Proprietary 2 Mbps.

Simonr — Fri, 11 Feb 2022 08:28:52 GMT

For development, I would strongly recommend getting a DK, as that will make development, testing various revisions of code, etc. In order to flash target boards you will need a J-Link device anyways, so if you don't already, the nRF52 DKs come with an interface MCU that can be used to flash external boards as well.

1. That depends on what you want to use the transmitter and receiver as. If you want USB functionalities you should also implement the USBD peripheral indeed.

2. Since these example projects are just transmitters and receivers, there is no connection implemented. It is explained in the examples how to set them up and receive/transmit data.

3. Yes, when an event is ready, the packet is transmitted from a transmitter, and received on the receiver. Once received, it prints the received packet on UART.

4. The packet is set in the transmitter example as "packet" and is prepared by pressing various buttons on the DK/board. You're free to modify this as you wish to set the "packet" to whatever you'd like.

Best regards,

Simon

RE: NRF52840 Proprietary 2 Mbps.

Ted — Thu, 10 Feb 2022 06:15:49 GMT

Hi Simon,

Thank you for your reply. I don't have the RRF52840 evaluation board. But I have its target board. If I want to use my 2 target boards to emulate a transmitter (examples\peripheral\radio\transmitter) and a receiver (examples\peripheral\radio\receiver).

1: I also need to port (examples\peripheral\usbd_cdc_acm) project to the transmitter and receiver project, correct?

2: How to connect transmitter and receiver board?

3: Does the transmitter pass the uart data to receiver automatically?

4: How do I insert data into the transmitter to send them to receiver?

Thank you,

Ted Wu

RE: NRF52840 Proprietary 2 Mbps.

Simonr — Wed, 09 Feb 2022 13:14:48 GMT

I'm afraid the SoftDevice isn't used with proprietary radio applications The SoftDevices are BLE central/peripheral protocol stacks. You can use the rather basic radio transmitter example here to use the radio in proprietary mode. You can configure the radio settings in the radio_configure() function by setting the NRF_RADIO->MODE = RADIO_MODE_MODE_Nrf_2Mbit.

Best regards,

Simon