💬 Building a Raspberry Pi Gateway

[ericvdb]

@marceloaqno what about gpio interrupts, is that supported?

I'm thinking to use a RPi as a pulse counter for water, electricity and gas with no radio, just ethernet or mqtt.
In combination with a I2C display, this could be a nice project ;)

Greetz,
Eric

[Christian Simonsen]

Hi,

I have a raspberry Pi 2 that I've installed MyController on. This works fine, I can access it via the browser. I have also wired up an NRF24L01+ module to the GPIO pins on the Raspberry Pi. And I have followed the steps under "install and build", which seem to have worked fine. I didn't make any changes to the conf file. However now Im stuck. How do I setup the Raspberry Pi with the NRF24L01+ as a gateway in the MyController Gateway setup page in Safari?

[marceloaqno]

@shfg There were some reports about this problem in the past, do you see any error messages in your mosquitto log?

@ericvdb yes, you can attach a function to handle an interruption like this:

uint8_t mode = FALLING;	// Valid options are: CHANGE, FALLING, RISING
uint8_t physPin = 16;	// Choose a pin that fits your needs

void irqHandler(void)
{
	// Process the interrupt
}

void setup() {
	attachInterrupt(physPin, irqHandler, mode);
}

Support for I2C was added in the latest version.

[marceloaqno]

@Christian-Simonsen If you are using the default build options for the RPi gateway, in MyController (Resources -> Add gateway) choose Ethernet for the type and enter your RPi ip address in the Host name field.

[Toyman]

Is it compatible with pre-2.0 versions eg 1.5?

[Christian Simonsen]

@Christian-Simonsen said:

I have a raspberry Pi 2 that I've installed MyController on. This works fine, I can access it via the browser. I have also wired up an NRF24L01+ module to the GPIO pins on the Raspberry Pi. And I have followed the steps under "install and build", which seem to have worked fine. I didn't make any changes to the conf file. However now Im stuck. How do I setup the Raspberry Pi with the NRF24L01+ as a gateway in the MyController Gateway setup page in Safari?

Thanks that did the trick

[Christian Simonsen]

Hi,

Background: I have a raspberry Pi 2 that I've installed MyController on. This works fine, I can access it via the browser. I have also wired up an NRF24L01+ module to the GPIO pins on the Raspberry Pi. I have also set up the raspberry pi as a gateway in the MyController Gateway setup page in Safari. It found it and it seem to work.

However to my question. How do I know if the Raspberry Pi gateway with NRF24L01 work? How can I monitor what the Raspberry Pi gateway receive? Is there a similar way as the "Serial Monitor" that I use in the Arduino application, when accessing Arduino Uno via USB?

If there is I need to monitor this via OSX Terminal.

[ericvdb]

@marceloaqno

Today i tried to use the sketch Water Meter Pulse Sensor in mysGateway.cpp but i run into alot of errors, you have any idea?

mysGateway.cpp:

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Marcelo Aquino <marceloaqno@gmail.org>
 * Copyleft (c) 2016, Marcelo Aquino
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */
 
#include <iostream>
#include <cstdio>
#include <unistd.h>

// For more options run ./configure --help

// Config file
//#define MY_LINUX_CONFIG_FILE "/etc/mysensors.dat"

// How many clients should be able to connect to this gateway (default 1)
#define MY_GATEWAY_MAX_CLIENTS 10

// Serial config
// Enable this if you are using an Arduino connected to the USB
//#define MY_LINUX_SERIAL_PORT "/dev/ttyACM0"
// Enable this if you need to connect to a controller running on the same device
//#define MY_IS_SERIAL_PTY
// Choose a symlink name for the PTY device
//#define MY_LINUX_SERIAL_PTY "/dev/ttyMySensorsGateway"
// Grant access to the specified system group for the serial device
//#define MY_LINUX_SERIAL_GROUPNAME "tty"

// MQTT options
//#define MY_CONTROLLER_IP_ADDRESS 192, 168, 178, 68
//#define MY_PORT 1883
//#define MY_MQTT_CLIENT_ID "mysensors-1"
//#define MY_MQTT_PUBLISH_TOPIC_PREFIX "mygateway1-out"
//#define MY_MQTT_SUBSCRIBE_TOPIC_PREFIX "mygateway1-in"

// Enable these if your MQTT broker requires usenrame/password
//#define MY_MQTT_USER "username"
//#define MY_MQTT_PASSWORD "password"

// Flash leds on rx/tx/err
//#define MY_DEFAULT_ERR_LED_PIN 12  // Error LED pin
//#define MY_DEFAULT_RX_LED_PIN  16  // Receive LED pin
//#define MY_DEFAULT_TX_LED_PIN  18  // Transmit LED pin
// Inverse the blinking feature
//#define MY_WITH_LEDS_BLINKING_INVERSE

#include <MySensors.h>

#define DIGITAL_INPUT_SENSOR 26                  // The digital input you attached your sensor.  (Only 2 and 3 generates interrupt!)

#define PULSE_FACTOR 1000                       // Nummber of blinks per m3 of your meter (One rotation/liter)

#define SLEEP_MODE false                        // flowvalue can only be reported when sleep mode is false.

#define MAX_FLOW 40                             // Max flow (l/min) value to report. This filters outliers.

#define CHILD_ID 1                              // Id of the sensor child

unsigned long SEND_FREQUENCY = 30000;           // Minimum time between send (in milliseconds). We don't want to spam the gateway.

MyMessage flowMsg(CHILD_ID,V_FLOW);
MyMessage volumeMsg(CHILD_ID,V_VOLUME);
MyMessage lastCounterMsg(CHILD_ID,V_VAR1);

double ppl = ((double)PULSE_FACTOR)/1000;        // Pulses per liter

volatile unsigned long pulseCount = 0;   
volatile unsigned long lastBlink = 0;
volatile double flow = 0;  
bool pcReceived = false;
unsigned long oldPulseCount = 0;
unsigned long newBlink = 0;   
double oldflow = 0;
double volume =0;                     
double oldvolume =0;
unsigned long lastSend =0;
unsigned long lastPulse =0;

void onPulse()     
{
  if (!SLEEP_MODE)
  {
    unsigned long newBlink = micros();   
    unsigned long interval = newBlink-lastBlink;

    if (interval!=0)
    {
      lastPulse = millis();
      if (interval<500000L) {
        // Sometimes we get interrupt on RISING,  500000 = 0.5sek debounce ( max 120 l/min)
        return;   
      }
      flow = (60000000.0 /interval) / ppl;
    }
    lastBlink = newBlink;
  }
  pulseCount++; 
}

void setup() {
  attachInterrupt(DIGITAL_INPUT_SENSOR, onPulse, FALLING); 
}

void presentation() {
  // Present locally attached sensors here  
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Water Meter", "1.1");

  // Register this device as Waterflow sensor
  present(CHILD_ID, S_WATER);  
}

void loop() {
  // Send locally attached sensors data here
  unsigned long currentTime = millis();

    // Only send values at a maximum frequency or woken up from sleep
  if (SLEEP_MODE || (currentTime - lastSend > SEND_FREQUENCY))
  {
    lastSend=currentTime;

    if (!pcReceived) {
      //Last Pulsecount not yet received from controller, request it again
      request(CHILD_ID, V_VAR1);
      return;
    }

    if (!SLEEP_MODE && flow != oldflow) {
      oldflow = flow;

      Serial.print("l/min:");
      Serial.println(flow);

      // Check that we dont get unresonable large flow value. 
      // could hapen when long wraps or false interrupt triggered
      if (flow<((unsigned long)MAX_FLOW)) {
        send(flowMsg.set(flow, 2));                   // Send flow value to gw
      }  
    }

    // No Pulse count received in 2min 
    if(currentTime - lastPulse > 120000){
      flow = 0;
    } 

    // Pulse count has changed
    if ((pulseCount != oldPulseCount)||(!SLEEP_MODE)) {
      oldPulseCount = pulseCount;

      Serial.print("pulsecount:");
      Serial.println(pulseCount);

      send(lastCounterMsg.set(pulseCount));                  // Send  pulsecount value to gw in VAR1

      double volume = ((double)pulseCount/((double)PULSE_FACTOR));     
      if ((volume != oldvolume)||(!SLEEP_MODE)) {
        oldvolume = volume;

        Serial.print("volume:");
        Serial.println(volume, 3);

        send(volumeMsg.set(volume, 3));               // Send volume value to gw
      } 
    }
  }
  if (SLEEP_MODE) {
    sleep(SEND_FREQUENCY);
  }
}

./configure --my-debug=enable --my-gateway=ethernet --my-radio=none --my-port=5003

[SECTION] Detecting target machine.
[OK] machine detected: SoC=BCM2835, Type=RPi, CPU=armv6l, REV=000e.
[OK] init system detected: systemd
[SECTION] Saving configuration.
[SECTION] Cleaning previous builds.
[OK] Finished.

make:

root@raspberrypi:/downloads/MySensors# make
cc  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/log.o drivers/Linux/log.c
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/noniso.o drivers/Linux/noniso.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/Print.o drivers/Linux/Print.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/EthernetClient.o drivers/Linux/EthernetClient.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/SerialPort.o drivers/Linux/SerialPort.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/Stream.o drivers/Linux/Stream.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/IPAddress.o drivers/Linux/IPAddress.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/compatibility.o drivers/Linux/compatibility.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/SoftEeprom.o drivers/Linux/SoftEeprom.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/EthernetServer.o drivers/Linux/EthernetServer.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o examples_linux/mysGateway.o examples_linux/mysGateway.cpp
examples_linux/mysGateway.cpp: In function âvoid onPulse()â:
examples_linux/mysGateway.cpp:96:37: error: âmicrosâ was not declared in this scope
     unsigned long newBlink = micros();
                                     ^
examples_linux/mysGateway.cpp: In function âvoid loop()â:
examples_linux/mysGateway.cpp:166:41: error: call of overloaded âset(volatile long unsigned int&)â is ambiguous
       send(lastCounterMsg.set(pulseCount));                  // Send  pulsecount value to gw in VAR1
                                         ^
examples_linux/mysGateway.cpp:166:41: note: candidates are:
In file included from ./MySensors.h:319:0,
                 from examples_linux/mysGateway.cpp:60:
./core/MyMessage.cpp:222:12: note: MyMessage& MyMessage::set(const char*) <near match>
 MyMessage& MyMessage::set(const char* value) {
            ^
./core/MyMessage.cpp:222:12: note:   no known conversion for argument 1 from âvolatile long unsigned intâ to âconst char*â
./core/MyMessage.cpp:234:12: note: MyMessage& MyMessage::set(bool)
 MyMessage& MyMessage::set(bool value) {
            ^
./core/MyMessage.cpp:241:12: note: MyMessage& MyMessage::set(uint8_t)
 MyMessage& MyMessage::set(uint8_t value) {
            ^
./core/MyMessage.cpp:256:12: note: MyMessage& MyMessage::set(uint32_t)
 MyMessage& MyMessage::set(uint32_t value) {
            ^
./core/MyMessage.cpp:263:12: note: MyMessage& MyMessage::set(int32_t)
 MyMessage& MyMessage::set(int32_t value) {
            ^
./core/MyMessage.cpp:270:12: note: MyMessage& MyMessage::set(uint16_t)
 MyMessage& MyMessage::set(uint16_t value) {
            ^
./core/MyMessage.cpp:277:12: note: MyMessage& MyMessage::set(int16_t)
 MyMessage& MyMessage::set(int16_t value) {
            ^
examples_linux/mysGateway.cpp:180:25: error: call of overloaded âsleep(long unsigned int&)â is ambiguous
     sleep(SEND_FREQUENCY);
                         ^
examples_linux/mysGateway.cpp:180:25: note: candidates are:
In file included from examples_linux/mysGateway.cpp:22:0:
/usr/include/unistd.h:444:21: note: unsigned int sleep(unsigned int)
 extern unsigned int sleep (unsigned int __seconds);
                     ^
In file included from ./MySensors.h:320:0,
                 from examples_linux/mysGateway.cpp:60:
./core/MySensorsCore.cpp:543:8: note: int8_t sleep(uint32_t, bool)
 int8_t sleep(const uint32_t sleepingMS, const bool smartSleep) {
        ^
Makefile:46: recipe for target 'examples_linux/mysGateway.o' failed
make: *** [examples_linux/mysGateway.o] Error 1

[ericvdb]

@marceloaqno

i was able to get a bit further by replacing all "unsigned long" declarations with "uint"

Remains unsolved:

root@raspberrypi:/downloads/MySensors# make
cc  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/log.o drivers/Linux/log.c
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/noniso.o drivers/Linux/noniso.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/Print.o drivers/Linux/Print.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/EthernetClient.o drivers/Linux/EthernetClient.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/SerialPort.o drivers/Linux/SerialPort.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/Stream.o drivers/Linux/Stream.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/IPAddress.o drivers/Linux/IPAddress.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/compatibility.o drivers/Linux/compatibility.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/SoftEeprom.o drivers/Linux/SoftEeprom.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o drivers/Linux/EthernetServer.o drivers/Linux/EthernetServer.cpp
g++ -DMY_GATEWAY_LINUX -DMY_DEBUG -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=hard -DLINUX_ARCH_RASPBERRYPI -Ofast -g -Wall -Wextra -DMY_PORT=5003  -I. -I./core -I./drivers/Linux -I./drivers/RPi -MMD -c -o examples_linux/mysGateway.o examples_linux/mysGateway.cpp
examples_linux/mysGateway.cpp: In function âvoid onPulse()â:
examples_linux/mysGateway.cpp:96:28: error: âmicrosâ was not declared in this scope
     uint newBlink = micros();
                            ^
examples_linux/mysGateway.cpp: In function âvoid loop()â:
examples_linux/mysGateway.cpp:180:25: error: call of overloaded âsleep(uint&)â is ambiguous
     sleep(SEND_FREQUENCY);
                         ^
examples_linux/mysGateway.cpp:180:25: note: candidates are:
In file included from examples_linux/mysGateway.cpp:22:0:
/usr/include/unistd.h:444:21: note: unsigned int sleep(unsigned int)
 extern unsigned int sleep (unsigned int __seconds);
                     ^
In file included from ./MySensors.h:320:0,
                 from examples_linux/mysGateway.cpp:60:
./core/MySensorsCore.cpp:543:8: note: int8_t sleep(uint32_t, bool)
 int8_t sleep(const uint32_t sleepingMS, const bool smartSleep) {
        ^
Makefile:46: recipe for target 'examples_linux/mysGateway.o' failed
make: *** [examples_linux/mysGateway.o] Error 1

[Toyman]

I probably miss something, but why are trying to compile the arduino sketch on Raspberry Pi???

[hek]

@ericvdb

As @Toyman implies, we haven't ported the full Arduino environment here. This should mainly be used for running the Serial/Ethernet gateway directly on your RPi.

You cannot just run any MySensors example without risking to make heavy adaptations/implementation on your own.

[marceloaqno]

@ericvdb micros() hasn't been ported, use:

millis() /1000;

for sleep(), replace:

sleep(SEND_FREQUENCY);

with

sleep(SEND_FREQUENCY, false);

Also, if you want to print something don't use Serial.print() or Serial.println(), use printf() or debug().

Serial.print("l/min:");
Serial.println(flow);

should be:

debug("l/min: %f\n", flow);

as @hek said, the main focus now is to be used as a gateway, with time adding sensors will become less problematic.

[ericvdb]

@marceloaqno
I have it almost working. Regarding the interrupt, I have to pull-up to 3.3V the io pin through a resistor of 10k?
Right now the interrupt isn't firing

[shfg]

@marceloaqno thanks, turned on mosquitto logging and am getting this error on mosquitto:

1476724216: Invalid protocol "MQTT" in CONNECT from 127.0.0.1.
1476724216: Socket read error on client (null), disconnecting.

Tried an alternative mosquitto broker on another server too - same error.

[ericvdb]

@marceloaqno

I have it working :smiley: only need to play with the debounce value

[shfg]

@marceloaqno I finally have the MQTT gateway working after upgrading mosquitto to the latest build... I had installed mosquitto with apt-get under Wheezy which apparently pulled an older version. In retrospect probably should have just upgraded to Jessie from the outset! Working perfectly now (still under wheezy though FWIW)... thanks!

[b0rmann]

This post is deleted!

[marceloaqno]

@Christian-Simonsen start the gateway with debug enabled:

mysGateway -d

[jerseyguy1996]

@Christian-Simonsen If you don't have debug enabled you could also just use:

tail -f /dev/ttyUSB20

My port is named ttyUSB20. You should substitute whatever you have named your port.

[Christian Simonsen]

@jerseyguy1996

Thanks I'll test it. But it seems like I've jumped over a step or two. Or something isn't working. Nothing happened when I wrote "Make" in Terminal, so I jumped over this step. I guess that might be the problem.

Do I have to configure (./configure -help) or can I use the default values when I connect the NRF24L01 to the GPIO pins?