Skip to content
  • MySensors
  • OpenHardware.io
  • Categories
  • Recent
  • Tags
  • Popular
Skins
  • Light
  • Brite
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (No Skin)
  • No Skin
Collapse
Brand Logo
  1. Home
  2. Hardware
  3. Step-by-step procedure to connect the NRF24L01+ to the GPIO pins and use the Raspberry as a Serial Gateway (MySensors 1.x)

Step-by-step procedure to connect the NRF24L01+ to the GPIO pins and use the Raspberry as a Serial Gateway (MySensors 1.x)

Scheduled Pinned Locked Moved Hardware
nrf24raspberry piraspberryraspberry nrf24l01 gpiogateway
168 Posts 47 Posters 175.0k Views 36 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • rmtuckerR Offline
    rmtuckerR Offline
    rmtucker
    wrote on last edited by
    #109

    This is the cpu usage,the spike is me compiling the software as above.
    0_1463683081123_chart(2).jpeg

    1 Reply Last reply
    0
    • mfalkviddM mfalkvidd

      @GertSanders cool. How often is the beta updated? Every build?

      GertSandersG Offline
      GertSandersG Offline
      GertSanders
      Hardware Contributor
      wrote on last edited by
      #110

      @mfalkvidd
      Well, that seems to be the case. Sometimes I see daily updates, sometimes a week passes by without any changes. I selected the BETA channel for updates and since then I have seen new functionality come in on a regular basis. Not all of it is relevant to Mysensors of course, but none the less it's fun to see Domoticz is developed actively.

      W 1 Reply Last reply
      1
      • GertSandersG GertSanders

        @mfalkvidd
        Well, that seems to be the case. Sometimes I see daily updates, sometimes a week passes by without any changes. I selected the BETA channel for updates and since then I have seen new functionality come in on a regular basis. Not all of it is relevant to Mysensors of course, but none the less it's fun to see Domoticz is developed actively.

        W Offline
        W Offline
        wergeld
        wrote on last edited by
        #111

        @GertSanders I have seen no issues in Domoticz stable with CPU usage. Thing just purrs along. Will have to check when I get home but i believe my system uptime is approaching 1 year. It "just works" as they say.

        I would like to upgrade to mysensors 2.0 library by it looks like the Pi repo has not being updated as often (last I checked, anyway).

        GertSandersG 1 Reply Last reply
        0
        • W wergeld

          @GertSanders I have seen no issues in Domoticz stable with CPU usage. Thing just purrs along. Will have to check when I get home but i believe my system uptime is approaching 1 year. It "just works" as they say.

          I would like to upgrade to mysensors 2.0 library by it looks like the Pi repo has not being updated as often (last I checked, anyway).

          GertSandersG Offline
          GertSandersG Offline
          GertSanders
          Hardware Contributor
          wrote on last edited by
          #112

          @wergeld
          Correct, the PI repo is basically unchanged. But it still is compatible with the 2.0-beta Mysensors library.

          W 1 Reply Last reply
          0
          • GertSandersG GertSanders

            @wergeld
            Correct, the PI repo is basically unchanged. But it still is compatible with the 2.0-beta Mysensors library.

            W Offline
            W Offline
            wergeld
            wrote on last edited by
            #113

            @GertSanders What? I was under the impression that some features (like sending messages to nodes from domitcz wouldn't work).

            GertSandersG 1 Reply Last reply
            0
            • W wergeld

              @GertSanders What? I was under the impression that some features (like sending messages to nodes from domitcz wouldn't work).

              GertSandersG Offline
              GertSandersG Offline
              GertSanders
              Hardware Contributor
              wrote on last edited by
              #114

              @wergeld
              Did not notice that, I can send values and "switch on" messages to nodes. The only thing I miss is the signing via ATSHA204. Even V_TEXT sending to and from nodes works.

              1 Reply Last reply
              0
              • Tore André RosanderT Offline
                Tore André RosanderT Offline
                Tore André Rosander
                wrote on last edited by
                #115

                I have some trouble with the gateway not storing the network map, if i restart the gateway my non-sensor nodes need to send some kind of heartbeat to reconnect to the gateway.

                Is this a known problem or is it something wrong with my setup?

                1 Reply Last reply
                0
                • hekH Offline
                  hekH Offline
                  hek
                  Admin
                  wrote on last edited by
                  #116

                  Yes, known problem.

                  I had some hopes on @marceloaqno and @aaron832 providing a PR into development branch (so we can scrap the old RPI code). But there hasn't been any activity in a while.
                  https://forum.mysensors.org/topic/2759/mysensors-raspberry-port-suggestions/12

                  Tore André RosanderT 1 Reply Last reply
                  0
                  • hekH hek

                    Yes, known problem.

                    I had some hopes on @marceloaqno and @aaron832 providing a PR into development branch (so we can scrap the old RPI code). But there hasn't been any activity in a while.
                    https://forum.mysensors.org/topic/2759/mysensors-raspberry-port-suggestions/12

                    Tore André RosanderT Offline
                    Tore André RosanderT Offline
                    Tore André Rosander
                    wrote on last edited by
                    #117

                    @hek But insted of including heartbeats from every non sensor node (trying to keep 2.4 ghz traffic to a minimum), can i solve this by using an arduino repeater node? So the repeater knows the network map and sends heartbeat to the gateway.

                    1 Reply Last reply
                    0
                    • hekH Offline
                      hekH Offline
                      hek
                      Admin
                      wrote on last edited by
                      #118

                      @Tore-André-Rosander

                      No, not possible. The repeater won't propagate it's knowledge about all sub-nodes.

                      1 Reply Last reply
                      0
                      • Sander StolkS Sander Stolk

                        @mfalkvidd I did the make clean and the make install and rebooted.
                        Still 0x4c eq. 76

                        Using username "pi".
                        Server refused our key
                        pi@192.168.1.14's password:
                        ______                      _   _
                        |  _  \                    | | (_)
                        | | | |___  _ __ ___   ___ | |_ _  ___ ____
                        | | | / _ \| '_ ` _ \ / _ \| __| |/ __|_  /
                        | |/ / (_) | | | | | | (_) | |_| | (__ / /
                        |___/ \___/|_| |_| |_|\___/ \__|_|\___/___|
                        
                        
                        Last login: Sat Apr  9 18:41:17 2016 from 192.168.1.34
                        
                        Monday, 11 April 2016, 12:10:24 pm CEST
                        Linux 4.1.18-v7+ armv7l GNU/Linux
                        Uptime.............: 1 days, 17h29m13s
                        Memory.............: 520336kB (Free) / 948056kB (Total)
                        Load Averages......: 0.00, 0.01, 0.05 (1, 5, 15 min)
                        Running Processes..: 97
                        IP Addresses.......: 192.168.1.14
                        
                        pi@Domoticz3:~$ cd Raspberry/
                        pi@Domoticz3:~/Raspberry$ cat MyConfig.h
                        /*
                         The MySensors library adds a new layer on top of the RF24 library.
                         It handles radio network routing, relaying and ids.
                        
                         Created by Henrik Ekblad <henrik.ekblad@gmail.com>
                         12/10/14 - Ported to Raspberry Pi by OUJABER Mohamed <m.oujaber@gmail.com>
                        
                         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.
                        */
                        
                        #ifndef MyConfig_h
                        #define MyConfig_h
                        
                        /***
                         * Configure Sensor Network
                         */
                        #define RF24_CHANNEL       111             //RF channel for the sensor net, 0-127
                        #define RF24_DATARATE      RF24_250KBPS   //RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
                        #define RF24_PA_LEVEL      RF24_PA_MAX    //Sensor PA Level == RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm, RF24_PA_HIGH=-6dBM, and RF24_PA_MAX=0dBm
                        #define RF24_PA_LEVEL_GW   RF24_PA_MAX  //Gateway PA Level, defaults to Sensor net PA Level.  Tune here if using an amplified nRF2401+ in your gateway.
                        #define BASE_RADIO_ID      ((uint64_t)0xA8A8E1FC00LL) // This is also act as base value for sensor nodeId addresses. Change this (or channel) if you have more than one sensor network.
                        
                        // MySensors online examples defaults
                        #define DEFAULT_CE_PIN 9
                        #define DEFAULT_CS_PIN 10
                        
                        
                        /***
                         * Enable/Disable debug logging
                         */
                        #define DEBUG
                        
                        
                        #ifdef __Raspberry_Pi
                                #define vsnprintf_P vsnprintf
                                #define snprintf_P snprintf
                                #define PSTR(x) (x)
                                #define printf_P printf
                                #define strlen_P strlen
                        #endif
                        
                        #endif
                        pi@Domoticz3:~/Raspberry$ make clean
                        rm -rf MyGateway MySensor MyMessage PiEEPROM PiGateway PiGatewaySerial MyGateway.o MySensor.o MyMessage.o PiEEPROM.o PiGateway.o PiGatewaySerial.o
                        pi@Domoticz3:~/Raspberry$ make all
                        g++ -c -o MyGateway.o MyGateway.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -c -o MySensor.o MySensor.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -c -o MyMessage.o MyMessage.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -c -o PiEEPROM.o PiEEPROM.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -c -o PiGateway.o PiGateway.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -o PiGateway MyGateway.o MySensor.o MyMessage.o PiEEPROM.o PiGateway.o -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24 -lrf24-bcm
                        g++ -c -o PiGatewaySerial.o PiGatewaySerial.cpp -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24
                        g++ -o PiGatewaySerial MyGateway.o MySensor.o MyMessage.o PiEEPROM.o PiGatewaySerial.o -Wall -Ofast -mfpu=vfp -lpthread -g -D__Raspberry_Pi -mfloat-abi=hard -mtune=arm1176jzf-s -D_TTY_NAME=\"/dev/ttyMySensorsGateway\" -D_TTY_GROUPNAME=\"tty\" -march=armv6zk -I. -I/usr/local/include/RF24 -lrf24-bcm -lutil
                        pi@Domoticz3:~/Raspberry$ sudo reboot
                        
                        Broadcast message from pi@Domoticz3 on pts/1 (Mon 2016-04-11 12:12:17 CEST):
                        
                        The system is going down for reboot NOW!
                        
                        pi@Domoticz3:~/Raspberry$
                        Using username "pi".
                        Server refused our key
                        pi@192.168.1.14's password:
                        ______                      _   _
                        |  _  \                    | | (_)
                        | | | |___  _ __ ___   ___ | |_ _  ___ ____
                        | | | / _ \| '_ ` _ \ / _ \| __| |/ __|_  /
                        | |/ / (_) | | | | | | (_) | |_| | (__ / /
                        |___/ \___/|_| |_| |_|\___/ \__|_|\___/___|
                        
                        
                        Last login: Mon Apr 11 12:10:24 2016 from 192.168.1.34
                        
                        Monday, 11 April 2016, 12:12:45 pm CEST
                        Linux 4.1.18-v7+ armv7l GNU/Linux
                        Uptime.............: 0 days, 00h00m25s
                        Memory.............: 770952kB (Free) / 948056kB (Total)
                        Load Averages......: 0.59, 0.16, 0.05 (1, 5, 15 min)
                        Running Processes..: 100
                        IP Addresses.......: 192.168.1.14
                        
                        pi@Domoticz3:~$ ls
                        bash_scripts  domoticz  Dropbox-Uploader  Raspberry  RF24
                        pi@Domoticz3:~$ sudo /etc/init.d/PiGatewaySerial start
                        [ ok ] Starting PiGatewaySerial (via systemctl): PiGatewaySerial.service.
                        pi@Domoticz3:~$ sudo /etc/init.d/PiGatewaySerial start
                        [ ok ] Starting PiGatewaySerial (via systemctl): PiGatewaySerial.service.
                        pi@Domoticz3:~$ sudo ln -s /dev/ttyMySensorsGateway /dev/ttyUSB20
                        ln: failed to create symbolic link ‘/dev/ttyUSB20’: File exists
                        pi@Domoticz3:~$ sudo /usr/local/sbin/PiGatewaySerial
                        Starting PiGatewaySerial...
                        Protocol version - 1.4
                        Created PTY '/dev/pts/2'
                        Gateway tty: /dev/ttyMySensorsGateway
                        ================ SPI Configuration ================
                        CSN Pin          = CE0 (PI Hardware Driven)
                        CE Pin           = Custom GPIO25
                        Clock Speed      = 8 Mhz
                        ================ NRF Configuration ================
                        STATUS           = 0x0e RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0
                        RX_ADDR_P0-1     = 0xa8a8e
                        RX_ADDR_P2-5     = 0xff 0xc4 
                        TX_ADDR          = 0xa8a8e1fc07
                        RX_PW_P0-6       = 0x20 0x20 0x20 0x00 0x00 0x00
                        EN_AA            = 0x3b
                        EN_RXADDR        = 0x06
                        RF_CH            = 0x4c
                        RF_SETUP         = 0x23
                        CONFIG           = 0x0e
                        DYNPD/FEATURE    = 0x3f 0x06
                        Data Rate        = 250KBPS
                        Model            = nRF24L01+
                        CRC Length       = 16 bits
                        PA Power         = PA_LOW
                        read: 5-5-5 s=5,c=5,t=5,pt=0,l=0:
                        version mismatch
                        ^CReceived SIGINT
                        Exiting...
                        pi@Domoticz3:~$
                        
                        J Offline
                        J Offline
                        jpbabou
                        wrote on last edited by
                        #119

                        @Sander-Stolk hi
                        how do you achieve to have a nice 'logon' screen ou your PI: Domotics Logo, @ip,memory,date... etc etc..
                        Im' newbee on raspberry from france
                        HAve a nice day
                        JP
                        i really want to have the same or any available sample like yours


                        | _ \ | | ()
                        | | | |
                        __ _ __ ___ ___ | |_ _ ___ ____
                        | | | / _ | '_ ` _ \ / _ | | |/ | /
                        | |/ / () | | | | | | () | |_| | (
                        / /
                        |
                        / _/|| || ||___/ _||_/|

                        Last login: Mon Apr 11 12:10:24 2016 from 192.168.1.34

                        Monday, 11 April 2016, 12:12:45 pm CEST
                        Linux 4.1.18-v7+ armv7l GNU/Linux
                        Uptime.............: 0 days, 00h00m25s
                        Memory.............: 770952kB (Free) / 948056kB (Total)
                        Load Averages......: 0.59, 0.16, 0.05 (1, 5, 15 min)
                        Running Processes..: 100
                        IP Addresses.......: 192.168.1.14

                        Tore André RosanderT 1 Reply Last reply
                        0
                        • J jpbabou

                          @Sander-Stolk hi
                          how do you achieve to have a nice 'logon' screen ou your PI: Domotics Logo, @ip,memory,date... etc etc..
                          Im' newbee on raspberry from france
                          HAve a nice day
                          JP
                          i really want to have the same or any available sample like yours


                          | _ \ | | ()
                          | | | |
                          __ _ __ ___ ___ | |_ _ ___ ____
                          | | | / _ | '_ ` _ \ / _ | | |/ | /
                          | |/ / () | | | | | | () | |_| | (
                          / /
                          |
                          / _/|| || ||___/ _||_/|

                          Last login: Mon Apr 11 12:10:24 2016 from 192.168.1.34

                          Monday, 11 April 2016, 12:12:45 pm CEST
                          Linux 4.1.18-v7+ armv7l GNU/Linux
                          Uptime.............: 0 days, 00h00m25s
                          Memory.............: 770952kB (Free) / 948056kB (Total)
                          Load Averages......: 0.59, 0.16, 0.05 (1, 5, 15 min)
                          Running Processes..: 100
                          IP Addresses.......: 192.168.1.14

                          Tore André RosanderT Offline
                          Tore André RosanderT Offline
                          Tore André Rosander
                          wrote on last edited by
                          #120

                          @jpbabou That is the Message of the day (motd) and you can edit it to fit your needs.
                          This guide should work on debian weezy and jessie
                          https://oitibs.com/debian-wheezy-dynamic-motd/

                          J 2 Replies Last reply
                          0
                          • Tore André RosanderT Tore André Rosander

                            @jpbabou That is the Message of the day (motd) and you can edit it to fit your needs.
                            This guide should work on debian weezy and jessie
                            https://oitibs.com/debian-wheezy-dynamic-motd/

                            J Offline
                            J Offline
                            jpbabou
                            wrote on last edited by
                            #121

                            @Tore-André-Rosander
                            Tks a lot for your answer.. It seems to look like what i want at logon..Iwill test it.
                            I keep you in touch!

                            1 Reply Last reply
                            0
                            • Tore André RosanderT Tore André Rosander

                              @jpbabou That is the Message of the day (motd) and you can edit it to fit your needs.
                              This guide should work on debian weezy and jessie
                              https://oitibs.com/debian-wheezy-dynamic-motd/

                              J Offline
                              J Offline
                              jpbabou
                              wrote on last edited by
                              #122

                              @Tore-André-Rosander
                              Tks a lot
                              It works's fine!!
                              pi@JpPi2 ~ $ ssh JpPi3
                              _ ____ _ _____
                              | |_ __ | _ ()__ /
                              _ | | '_ | |) | | |
                              | || | |) | /| |) |
                              _
                              /| ._/|| ||___/
                              |
                              |

                              Welcome to Raspbian GNU/Linux 8.0 (jessie) (4.4.7-v7+).

                              System information as of: Wed Jun 1 09:10:09 CEST 2016

                              System load: 0.01 IP Address:
                              Memory usage: 17.9% System uptime: 1 day
                              Usage on /: 27% Swap usage: 0.0%
                              Local Users: 1 Processes: 126

                              Last login: Wed Jun 1 09:03:53 2016 from raspberryjp

                              1 Reply Last reply
                              1
                              • A Offline
                                A Offline
                                Atman
                                wrote on last edited by
                                #123

                                I have been struggeling with this for some time now. It seems my compiler is not the standard for raspberry pi? (I have a pi 2). I have used the domoticz sdcard as ground for my system and it works (a bit sketchy with random freezes and I cannot access the domotics webserver from chrome) but still. Anyway, I get stuck on making the RF24 package. Any ideas?

                                pi@raspberrypi ~/RF24 $ make all && sudo make install
                                arm-linux-gnueabihf-g++ -fPIC -march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -Ofast -Wall -pthread  -c RF24.cpp
                                cc1plus: error: bad value (cortex-a7) for -mtune switch
                                Makefile:40: recipe for target 'RF24.o' failed
                                make: *** [RF24.o] Error 1
                                
                                1 Reply Last reply
                                0
                                • alexsh1A Offline
                                  alexsh1A Offline
                                  alexsh1
                                  wrote on last edited by
                                  #124

                                  Did anyone setup rfm69 successfully on the raspberry pi

                                  1 Reply Last reply
                                  0
                                  • GertSandersG Offline
                                    GertSandersG Offline
                                    GertSanders
                                    Hardware Contributor
                                    wrote on last edited by
                                    #125

                                    Has anyone used the Raspberry GW software in combination with nodes that run the new 2.0.0 MySensors code ?

                                    1 Reply Last reply
                                    0
                                    • tbowmoT Offline
                                      tbowmoT Offline
                                      tbowmo
                                      Admin
                                      wrote on last edited by
                                      #126

                                      @GertSanders

                                      It's not supported, 2.0.0 nodes require a 2.0.0 GW. And the raspberry pi port is not updated to 2.0.0 (and unfortunately there is currently no one in the core group that uses the rpi gw.. We all use serial / ethernet gw's of some sort)

                                      GertSandersG W 2 Replies Last reply
                                      0
                                      • tbowmoT tbowmo

                                        @GertSanders

                                        It's not supported, 2.0.0 nodes require a 2.0.0 GW. And the raspberry pi port is not updated to 2.0.0 (and unfortunately there is currently no one in the core group that uses the rpi gw.. We all use serial / ethernet gw's of some sort)

                                        GertSandersG Offline
                                        GertSandersG Offline
                                        GertSanders
                                        Hardware Contributor
                                        wrote on last edited by
                                        #127

                                        @tbowmo
                                        I was afraid of that. In my enthusiasm I updated to 2.0.0, but now my new nodes play dead.
                                        At least I know why.
                                        Time to make that old ethernet gateway functional again.
                                        Since Breda meetup is this weekend, I will have no more time to figure this out (if I could ever, this is UNIX). Maybe after I can try something.

                                        GertSandersG 1 Reply Last reply
                                        0
                                        • tbowmoT tbowmo

                                          @GertSanders

                                          It's not supported, 2.0.0 nodes require a 2.0.0 GW. And the raspberry pi port is not updated to 2.0.0 (and unfortunately there is currently no one in the core group that uses the rpi gw.. We all use serial / ethernet gw's of some sort)

                                          W Offline
                                          W Offline
                                          wergeld
                                          wrote on last edited by
                                          #128

                                          @tbowmo

                                          What would be required to get the RPi gateway up and running? Having single controller/gateway is great.

                                          GertSandersG 1 Reply Last reply
                                          0
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          11

                                          Online

                                          11.7k

                                          Users

                                          11.2k

                                          Topics

                                          113.0k

                                          Posts


                                          Copyright 2019 TBD   |   Forum Guidelines   |   Privacy Policy   |   Terms of Service
                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • MySensors
                                          • OpenHardware.io
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular