What radio to use? NRF24L01+, RFM69, RFM73 ?

Cliff Karlsson

s so you need to adapt level

I just got my rfm69hw´s and connected it to an arduino nano for a couple of seconds before i realized that I needed to adapt the level. Is it possible that it survived this mistake?

I have nov connected a IIC I2C Interface Level Conversion Module 5-3v
I connected NSS,Mosi,SCK and GND to the "B" side and connected the arduino nano to the "A" side. Is this correct?

fets

@Cliff-Karlsson seems correct.
Personnaly I use 3 * 2 resistors (10k and 4.7k) for NS, MOSI and SCK rfm69hw inputs.
Don't forget to change MyTransportRF69 contructor to use high power RFM69 ;)

Cliff Karlsson

@fets said:

H version stands for High power.
C version is pin compatible with RFM12.
RFM69 uses SPI so the connections are :

Arduino RFM69
10 <-------------------> NSS
11 <-------------------> MOSI
12 <-------------------> MISO
13 <-------------------> SCK
DI00 <-------------------> 2
GND <-------------------> GND
3.3V
ANA : antenna

NSS, MOSI and SCK are inputs so you need to adapt level if you use 5V arduino

I have connected a RFM69HW to my arduino nano+rpi gateway and have connected a RFM69W+Mini Pro 3.3V to a soil sensor but nothing shows up in Domoticz. Do I have to do anything else? Do I need a external antenna? The two RFM's is only like 1m apart.

Cliff Karlsson

Do I need to alter the code for the gateway or the sensor-sketches?

fets

@Cliff-Karlsson said:
Do I need a external antenna? The two RFM's is only like 1m apart.

I never tested without antenna. I used simple wire the length dependinf of your frequency?
Did you look at your arduino serial outpout ?
If there is nothing, it may that because RFM69 init failed

NeverDie

Yes you should put an antenna on. It doesn't have a PCB trace antenna. A simple piece of wire, typically cut to 1/4 wavelength, will work fine.

Cliff Karlsson

Ok, I have some thin insulated copper wire, will that work? And how long wire will I need for the 868mhz frequency?

But just to be clear, do I need to alter the gateway or the sensor sketches in some way to have it use the rfm radio?

fets

1/4 wavelength = (3 10^8 / (868 10^6)) / 4 =>about 8.64 cm

Cliff Karlsson

Thanks, sorry for repeating the question but do I need to alter the code on gateway or sensors?

fets

You only need to create a MyTransportRFM69 instead of MyTransportNRF24. This is the constructor : MyTransportRFM69 (RFM69_FREQUENCY, RFM69_NETWORKID, RF69_SPI_CS, RF69_IRQ_PIN, isRFM69HW, RF69_IRQ_NUM);
if you use a RFM99H, you have to set the 5th parameter (isRFMHW) to true.

Cliff Karlsson

Sorry for being semi-retarded, but is this done in the gateway sketch? Sensor
-sketch or both? Is there any documentation on this part as I am a complete beginner.

fets

both, here is the documentation

Francois

@Cliff-Karlsson You have to change the following setting in Myconfig.h for you radio


/**********************************
*  RFM69 Driver Defaults
***********************************/
// Default network id. Use the same for all nodes that will talk to each other
#define RFM69_NETWORKID     100

// Default frequency to use. This must match the hardware version of the RFM69 radio (uncomment one):
 #define RFM69_FREQUENCY   RF69_433MHZ
//#define RFM69_FREQUENCY   RF69_868MHZ
//#define FREQUENCY     RF69_915MHZ

// Enable this for encryption of packets
//#define RFM69_ENABLE_ENCRYPTION
#define RFM69_ENCRYPTKEY  "sampleEncryptKey"

Then in MySensor.h you change the following:

ifndef MySensor_h
#define MySensor_h
#include "Version.h"   // Auto generated by bot
#include "MyConfig.h"
#include "MyHw.h"
#include "MyTransport.h"
//#include "MyTransportNRF24.h"
#include "MyTransportRFM69.h" 
#include "MyParser.h"
#ifdef MY_SIGNING_FEATURE
#include "MySigning.h"
#include "MySigningNone.h"
#endif
#include "MyMessage.h"
#ifdef MY_OTA_FIRMWARE_FEATURE
#include "utility/SPIFlash.h"
#endif
#include <stddef.h>
#include <stdarg.h>```


// look for this lines and changes this

class MySensor
{
  public:
	/**
	* Constructor
	*
	* Creates a new instance of Sensor class.
	*
	*/
	//MySensor(MyTransport &radio =*new MyTransportNRF24(), MyHw &hw=*new MyHwDriver()
	MySensor(MyTransport &radio =*new MyTransportRFM69(), MyHw &hw=*new MyHwDriver()

Cliff Karlsson

@fets said:

MyTransportRFM69 (RFM69_FREQUENCY, RFM69_NETWORKID, RF69_SPI_CS, RF69_IRQ_PIN, isRFM69HW, RF69_IRQ_NUM);

Hmm. I can't get it to work. This is what I have done:
In Myconfig.H:

Everything was already set up like the example only 868Mhz was uncommented and that is the same as I got.

Mysensors.h:

Commented #include "MyTransportNRF24.h" as in the example.
Added "#include "MyTransportRFM69.h" as it was not present.

Under class Mysensor,
Commented "MySensor(MyTransport &radio =*new MyTransportNRF24(), MyHw &hw=*new MyHwDriver()"
Added "MySensor(MyTransport &radio =*new MyTransportRFM69(), MyHw &hw=*new MyHwDriver()"

In the Serial Gateway sketch:
Commented the line "#include <MyTransportNRF24.h>"
Commented the line "MyTransportNRF24 transport(RF24_CE_PIN, RF24_CS_PIN, RF24_PA_LEVEL_GW);"
Added the line "MyTransportRFM69 (RFM69_FREQUENCY, RFM69_NETWORKID, RF69_SPI_CS, RF69_IRQ_PIN, isRFM69HW=true, RF69_IRQ_NUM);

When trying to upload to my nano I get an error:

'transport' was not declared in this scope.
And this line is highlighted: MySensor gw(transport, hw /, signer/);

fets

@Cliff-Karlsson, sorry for my late answer.
you made a mistake on the line added in the serialgateway, it should be :
MyTransportRFM69 transport (RFM69_FREQUENCY, RFM69_NETWORKID, RF69_SPI_CS, RF69_IRQ_PIN, true, RF69_IRQ_NUM) ;

GertSanders

Has anyone used the Raspberry Pi Gateway implementation with an Rf69? Does it work? On which pin does one connect the interrupt pin ?

Cliff Karlsson

@fets said:

Personnaly I use 3 * 2 resistors (10k and 4.7k) for NS, MOSI and SCK rfm69hw inputs.

Ok, I am continuing with my neverending story :) I have gotten the sketches to complie and I have used a 8.6cm wire as antenna for both of them. But I still does not se any sensors in domoticz. I might have destroyed my radios as I might have accidently used 5 volts on them for a short while. I am trying to use some new radios this time.

First question: I have a RFM69HW on my gateway and a RFM69W on my sensor (both 868Mhz) They are compatible as I understand only that the H is more powerful?

Second question: If I am using a Nano I can just cut a cable in two and solder a 10k and a 4.7k in series in between them before connecting the NS, MOSI and SCK ? When checking online voltage divider calculators online and specify 5V in and 10k + 4,7k resistors it says that voltage out is 1.599v

NeverDie

First question: I have a RFM69HW on my gateway and a RFM69W on my sensor (both 868Mhz) They are compatible as I understand only that the H is more powerful?

Assuming they are of the same frequency, then basically yes, though there is one small difference in the code to account for the RFM69HW having a PA, which MUST be turned on for it to transmit.

fets

@Cliff-Karlsson,
question 2 : I think you misplaced the connection to RFM69 :
Here is how to connect arduino and RFM69.
Is it what you did ? (I bet you switched 4.7k ans 10k )

Cliff Karlsson

I am still having some problems with getting any data from the RFM69.

Do I need to define some pins to like in the NRF24L01 section in the Myconfig.h ?
I have not defined any pins anywhere for the RFM69 or do I not need to do that?

/**********************************
*  NRF24L01 Driver Defaults
***********************************/
#define RF24_CE_PIN		   9
#define RF24_CS_PIN		   10
#define RF24_PA_LEVEL 	   RF24_PA_MAX
#define RF24_PA_LEVEL_GW   RF24_PA_LOW
// RF channel for the sensor net, 0-127
#define RF24_CHANNEL	   76
//RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
#define RF24_DATARATE 	   RF24_250KBPS
// This is also act as base value for sensor nodeId addresses. Change this (or channel) if you have more than one sensor network.
#define RF24_BASE_RADIO_ID ((uint64_t)0xA8A8E1FC00LL)

// Enable SOFTSPI for NRF24L01 when using the W5100 Ethernet module
//#define SOFTSPI
#ifdef SOFTSPI
	// Define the soft SPI pins used for NRF radio
	const uint8_t SOFT_SPI_MISO_PIN = 16;
    const uint8_t SOFT_SPI_MOSI_PIN = 15;
    const uint8_t SOFT_SPI_SCK_PIN = 14;
#endif


/**********************************
*  RFM69 Driver Defaults
***********************************/
// Default network id. Use the same for all nodes that will talk to each other
#define RFM69_NETWORKID     100

// Default frequency to use. This must match the hardware version of the RFM69 radio (uncomment one):
// #define RFM69_FREQUENCY   RF69_433MHZ
#define RFM69_FREQUENCY   RF69_868MHZ
//#define FREQUENCY     RF69_915MHZ

// Enable this for encryption of packets
//#define RFM69_ENABLE_ENCRYPTION
#define RFM69_ENCRYPTKEY    "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!```

What radio to use? NRF24L01+, RFM69, RFM73 ?

8

11.7k

11.2k

113.0k