DerekGn

Hi,

I have uploaded a class library for interfacing the Nordic semiconductor NRF24L01P radio module. It is available at https://mfnordic.codeplex.com/ in source code form.

Some documentation has been posted on my blog http://corememorydum...n-codeplex.html

Its a pretty easy library to use so I hope that its easy for someone to pick up and use.

I have recently finished version one of a simple home monitoring system based around a Netduino Plus 2 and some custom made temperature and humidity sensors.

I have posted some more detailed info on my blog :http://corememorydum...version-10.html

The custom sensor

Web UI

Hi,

I have recently purchased a Netduino plus 2 to use as a hub for a set of wireless humidity and temperature sensors that communicate using an NRF24L01P radio module.

I am in the middle of developing a class lib for the radio module. The issue that I have is that the interrrupt is not firing at all. I did some digging on the forum but I have yet to find any thing that could indicate an issue.

_radio = new Nrf24L01P(SPI_Devices.SPI1, Pins.GPIO_PIN_D0, Pins.GPIO_PIN_D1, Pins.GPIO_PIN_D2)                         {                             TransmitAddress = AppConfiguration.Instance.RadioAddress,                             Channel = AppConfiguration.Instance.RadioChannel,                             Mode = Mode.Transmitter                         };

The interrupt line from the device is connected to Pins.GPIO_PIN_D2.

The Nrf24L01P initalises the interrupt pin in the following way, only relevent code shown:

public Nrf24L01P(SPI.SPI_module spi, Cpu.Pin chipSelectPin, Cpu.Pin chipEnablePin, Cpu.Pin interruptPin)        {            _interruptPin = new InterruptPort(interruptPin, false, Port.ResistorMode.PullUp,                                              Port.InterruptMode.InterruptEdgeLow);            _interruptPin.OnInterrupt += HandleInterrupt;            .....        }

To trigger an interrupt I perform the following:

while (true)            {                _radio.Transmit(new byte[] {0,1,2,3,4},true);                Thread.Sleep(1000);            }

This should cause an interrrupt when the packet send retry is exhausted, there is no receive radio to ack the sent data.

The hardware wiring is pretty straight forward so I do not believe that this is an issue. I have verified the signal levels/connectivity as much as I can with a multimeter. I dont have a scope that I can use. I am pretty familiar with the characteristics of the radio module as I have built a sensor node with an AVR and it is functioning correctly.

I would like to know is there something I am overlooking wrt how the netduino/MCLR handles and raises interrupts that could cause this behaviour.

Thanks in advance