WiFi_RFM69_MQTT Network

[ragoth]

Ragoth,

Keep us posted on how your project is going & any improvements that you add.

[papa]

Oct 14, 2021 12:02:05 GMT ragoth said:

Dear Papa, I am getting this error message while compiling:

RFM_MQTT_GW_25.6_pub:133:37: error: 'IS_RFM69HW_HCW' was not declared in this scope
RFM69X radio(RF69_SPI_CS, RF69_IRQ, IS_RFM69HW_HCW, digitalPinToInterrupt(RF69_IRQ)) ;
^~~~~~~~~~~~~~
C:\Users\ragot\DATA_FOLDER\Documents\RFM69_PAPA\RFM_MQTT_GW_25.6_pub\RFM69X.cpp: In member function 'bool RFM69X::initialize(uint8_t, uint8_t, uint8_t)':
RFM69X.cpp:114:23: error: no matching function for call to 'SPIClass::begin(int, int, int, int)'
SPI.begin(18,19,23,5); //void SPIClass::begin(int8_t sck, int8_t miso, int8_t mosi, int8_t ss)
^
In file included from C:\Users\ragot\DATA_FOLDER\Documents\RFM69_PAPA\RFM_MQTT_GW_25.6_pub\RFM69X.cpp:50:0:
C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src/SPI.h:159:15: note: candidate: static void SPIClass::begin()
static void begin();
^~~~~
C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SPI\src/SPI.h:159:15: note: candidate expects 0 arguments, 4 provided
C:\Users\ragot\DATA_FOLDER\Documents\RFM69_PAPA\RFM_MQTT_GW_25.6_pub\RFM_MQTT_GW_25.6_pub.ino: In function 'void connectWifi()':
RFM_MQTT_GW_25.6_pub:226:23: error: 'class IPAddress' has no member named 'toString'; did you mean 'fromString'?
IP = WiFi.localIP().toString();
^~~~~~~~
fromString

[papa]

        Updated, Oct. 20, 2021

ragoth, I've looked things over & I think the following will help your compiling.

First, in the post above, I provided a updated & better version of the main ESP32 Gateway sketch.  (Ethernet code is removed.)
      Previously, I took the wrong approach to the line that begins with "#define IS_RFM69HW_HCW"
I was using the method comment/uncomment for deactivate/activate the setting. I needed to leave the line always UNcommented & use the method false/true for deactivate/activate the setting.  I updated this instructional post accordingly.

As to your other compiling errors, for one thing, I wonder, in the Arduino IDE Tools/Board menu, did you select an ESP32 board that is compatible with your ESP32 board's pinout? For example, if you still have an Arduino board selected, you'd get the "to string" error because the Arduino would not normally have the WiFi code. (When I selected an Arduino board, I got the compiling error that you got.)

If you had selected an ESP32 board, was your line still EXACTLY "IP = WiFi.localIP().toString();"

Also I wonder, do you have the 3 RFM698X files in the same sub-folder as the the ESP32 Gateway sketch?

Make necessary changes based on this post & see if things work better.

[ragoth]

13:10:47.106 ->
13:10:47.106 -> GW RF69 25.6.3 esp Nw2
13:10:47.106 ->
13:10:47.106 -> 433 Mhz...
13:10:47.106 ->
13:10:47.106 -> Connecting to Access
13:10:48.222 -> ...
13:10:52.223 -> WiFi connected
13:10:52.223 -> IP address: 192.168.86.250
13:10:52.223 -> connecting
13:10:53.212 -> no link
13:10:55.279 -> MQTT OK
13:12:49.724 -> MQTT msg: hom2/rfm_gw/nb/node06/dev99: NODE 6 WAKEUP
13:12:49.724 -> MQTT msg: hom2/rfm_gw/nb/node06/dev16: OFF
13:12:50.700 -> MQTT msg: hom2/rfm_gw/nb/node06/dev16: ON
13:12:52.697 -> MQTT msg: hom2/rfm_gw/nb/node06/dev16: OFF
13:12:54.683 -> MQTT msg: hom2/rfm_gw/nb/node06/dev16: ON

Dear Papa, It works fine now. Thank you soo much, with best regards.

[papa]

ragoth, you are welcome.

Thanks for reporting back that the ESP32-RFM69 Gateway was working for you.

How about others?  How are you using the new ESP32 Gateway?

If you have benefited from this project, the least you can do is report your results.

[ragoth]

Dear Papa, I want to use this Gateway with Reyax.com server, to use that we have to enter not only server IP address, but MQtt_username and MQTT_password in the ESP32 Gateway code. Please advice how can I add MQTT username and password in the Gateway sketch.

[papa]

            ESP32 Gateway with MQTT Username & Password ??

I have not used the username/password feature of MQTT, but looking at PubSubClient examples, that doesn't seem too complicated.

     RF69_MQTT_GW_25.6.4_esp_pub.ino (29.39 KB)  << Members, download this, give it a try & let me know if it works.

Early in the sketch are these 3 lines. Like it says, to use authentication, UNcomment lines 2 & 3 & give your MQTT Username & Password.

 // For secure, authenticated MQTT, UNcomment next 2 lines, give username & password
// #define MQTT_USER "your_username"
// #define MQTT_PASS   "your_password"
To see where else I added to the sketch, search for "client.connect"

P.S. This version still needs the 3 RFM69X files offered above.

[ragoth]

Papa, you are great to give a helping hand spontaneously.
Thanks with best regards.

[papa]

You're welcome, ragoth.

Remember to report back how well the new sketch works.

[ragoth]

Dear Papa, the new sketch also works fine with MQTT Username and MQTT Password credentials. Thank you.

Thanks, ragoth, for reporting back.  I'm glad it worked.

[ragoth]

Dear Papa, I have one more requirement i.e., can I have one to one communication between Node to Node without any gateway.

[papa]

Sorry, ragoth, I'm too busy with other things to work on that project.

Besides I'm not sure I see a good reason for doing it. Yes, two RFM69 nodes could communicate with each other, but with no gateway, they could not communicate with openHAB or other coordinating system. With our forum's Gateway/Node networks, one can in effect "communicate" between any nodes, that is program openHAB rules to affect one node based on what happens to other nodes.

If you're really wanting Node to Node communication AND communication via a Gateway, I'm not sure an Arduino has enough program memory for the additional code necessary.

[papa]

        Update, WiFi_RFM69 Gateways in Operation

Recently, after several years of service, my Arduino Ethernet RFM69 Gateways became unreliable. Using Sparkfun ESP32 Things as described above, I created & deployed two new WiFI RFM69 MQTT Gateways.  They seem to work well communicating with my Arduino RFM69 nodes, except that the computer hosting openHAB & Mosquitto is acting flaky in staying connected to my LAN.

While I was refreshing myself in building these WiFi gateways, I worked out how to implement gateways on ESP32 boards where the primary SPI bus is not available (like the HiLetgo OLED ESP32). The following posts will document necessary changes in wiring & coding.

    Next, Wiring an ESP32 Gateway for the Secondary SPI Bus

[papa]

            A Two-Way RFM69 Gateway with WiFI & MQTT, Secondary SPI Bus

        Updated May 2, 2023   RFM69 DIO0 Interrupt Pin moved from ESP32 pin 5 (needed by OLED) to ESP32 pin 25

The following wiring diagram for the two way RFM69 Gateway (version 2) is similar to one above, EXCEPT the RFM69 radio is connected to the ESP32's secondary SPI pins. Especially for when the Gateway will be disconnected from the Serial Monitor, one steady-burning LED will signal that WiFi/MQTT is connected. The flashing LED signals when radio communication is happening. For each LED, the originally shorter pin goes into an ESP32 ground. Each originally longer pin goes into the ESP32 pin designated in the Gateway sketch.

For hints about parts, code libraries, etc., see posts starting here. Disregard references to ESP32 pins (primary SPI bus).

As able, you may change the ESP32 pins for the LEDs, but you must also change the pin numbers in the Gateway sketch (see below). Unfortunately the HiLetgo OLED ESP32 board seems to have limited pins available.

       << Members, click on pic for larger view.

                Next, Prepare to Program the ESP32-RFM69 Gateway, version 2

[papa]

        Prepare to Program the ESP32-RFM69 Gateway, Version 2
                        Latest Version

     RF69_MQTT_GW_25.6.5_esp_pub.ino (30.24 KB)  << As a forum member, download this & save it in your Arduino IDE sketch folder.

         ^^ slightly updated, May 2, 2023  RFM69 pin DIO0 moved from ESP32 pin 5 (needed by OLED) to ESP32 pin 25

Open the Arduino IDE (program for loading, editing, & uploading Arduino sketch programs). From the Arduino IDE, open the sketch (program) file downloaded above. Accept the sketch's being put in a subfolder.

Before uploading (sending) the Gateway sketch to the Gateway, you must edit it to customize to your situation. Your IDE computer must also have the additional code library files that the Gateway sketch needs. The following offers guidance.

Note: In editing a sketch, sometimes we are told to "comment out a code line" which means put two forward slashes ("//") at the start of the code line to make the rest of a line a "comment" (not programming code) & disables the code. To UNcomment a line means to remove the two forward slashes ("//") at the start of the line to make the rest of the line into working code except "//" later in the line still indicates comment there. For example in the Gateway sketch, see "// #define DEBUGRADIO" which is a comment, not active code. The line "#define DEBUG // uncomment for MQTT debugging" starts with active code & ends with a comment (after //).

   Adapt this post to download & install the RFM69X code library files. Place the files in the same file folder as the Gateway sketch.

Customize the Gateway sketch following the posts starting here

Then to this Gateway sketch, add this customization: To use the secondary SPI bus, find the line "#define Alt_SPI"  & UNcomment it (remove // at the line's start). If commented, the sketch uses the primary SPI bus. To see the related programming, search for "ifdef Alt_SPI"

[papa]

            Followup Notes

I assume the HiLetgo OLED ESP32 board uses the primary SPI bus for something.  I don't know yet. I believe that one can use both of an ESP32's SPI buses.

Something like this post might help point the way.