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  3. RS485/RS232/Serial transport class for mysensors.org

RS485/RS232/Serial transport class for mysensors.org

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rs485 serialrs485
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  • S Offline
    S Offline
    scalz
    Hardware Contributor
    wrote on last edited by scalz
    #96

    @hausinger if you know about coding..

    • plain C lib for esp8266, it can be adapted to work with Arduino Esp: https://github.com/plieningerweb/esp8266-software-uart
    • or use stock arduino esp8266 software serial lib (https://github.com/plerup/espsoftwareserial), and inspire yourself from lib above, and code your CE pin management..
    1 Reply Last reply
    0
    • BartB Offline
      BartB Offline
      Bart
      wrote on last edited by
      #97

      Hi,

      Any reason why this lib is not using Serial1 or Serial2 on Arduino Mega 2560 instead of AltSoftSerial?

      1 Reply Last reply
      0
      • H Offline
        H Offline
        hek
        Admin
        wrote on last edited by
        #98

        @Bartek-Celary
        No, not really. Just that not many that uses 2560.

        1 Reply Last reply
        0
        • BartB Offline
          BartB Offline
          Bart
          wrote on last edited by Bart
          #99

          How about adding the following define to use the Serial1/2 on Mega. I have not tested yet but assuming the AltSoftSerial lib has the same interface/functionality it should work.

          #define MY_RS485_SERIAL Serial1
          
          diff --git a/core/MyTransportRS485.cpp b/core/MyTransportRS485.cpp
          index 814f721..ea35c9e 100644
          --- a/core/MyTransportRS485.cpp
          +++ b/core/MyTransportRS485.cpp
          @@ -92,7 +92,11 @@ unsigned char _recSender;
           unsigned char _recCS;
           unsigned char _recCalcCS;
           
          +#if defined(MY_RS485_SERIAL)
          +HardwareSerial& _dev = MY_RS485_SERIAL;
          +#else
           AltSoftSerial _dev;
          +#endif
           
           
           unsigned char _nodeId;
          
          1 Reply Last reply
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          • H Offline
            H Offline
            hek
            Admin
            wrote on last edited by
            #100

            Looks like a neat solution. If it verifies ok, please create a pull request agains the development branch.

            1 Reply Last reply
            0
            • lanL Offline
              lanL Offline
              lan
              wrote on last edited by
              #101

              I understand that the RS485 is a separate gateway to communicate. Is it also possible to have the wireless gateway and RS485 gateway combined?

              1 Reply Last reply
              0
              • H Offline
                H Offline
                hek
                Admin
                wrote on last edited by
                #102

                Currently, no..

                lanL 1 Reply Last reply
                0
                • H hek

                  Currently, no..

                  lanL Offline
                  lanL Offline
                  lan
                  wrote on last edited by
                  #103

                  @hek Thanks for the quick response. I'm looking for some direction (this might not be the right forum).
                  I want to create a node to control my Itho Ecofan ventilation box. I now have a working program (thanks to the help of Rogier Reedijk The nodo now uses a CC1101 transceiver to control the box and thus uses the SPI bus. I'm looking for some direction to use this transmitter as part of my sensor network so I can control it from my Domoticz. Hope you can give me some directions how to proceed.

                  1 Reply Last reply
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                  • H Offline
                    H Offline
                    hek
                    Admin
                    wrote on last edited by
                    #104

                    Why do you need to hook it up to RS485 wired network? Can't you just forwards commands to the CC11001 from any radio node or the gateway?

                    1 Reply Last reply
                    0
                    • lanL Offline
                      lanL Offline
                      lan
                      wrote on last edited by
                      #105

                      Is it then possible to use the two radio's on one node and share the SPI bus?

                      1 Reply Last reply
                      0
                      • H Offline
                        H Offline
                        hek
                        Admin
                        wrote on last edited by
                        #106

                        Yes, if the CC11001 behaves correctly.

                        1 Reply Last reply
                        0
                        • lanL Offline
                          lanL Offline
                          lan
                          wrote on last edited by
                          #107

                          Thanks, will try that

                          1 Reply Last reply
                          0
                          • elektro12345E Offline
                            elektro12345E Offline
                            elektro12345
                            wrote on last edited by elektro12345
                            #108

                            Hello,
                            I have a problem running gatewayserial to rs-485 and the node with the usual lightsensor.
                            NODE # 1 as a gateway and tried to upload a sketch of the library 2.0 and 1.5.4, and the monitor serial I can not see any data, I use to check on the serial PuTTy com6 because the converter rs-485 to USB is connected to the PC.

                            NODE # 2 as a light sensor, during the upload Sketch by arduino programmer for serial monitor can see the data being sent but after plugging arduino to rs-485 as below no longer visible.

                            My question is whether I have something wrong with the connection or sketch, can someone show an example of a complete sketch for the gateway, and a node?

                            Connection mine looks like this:
                            TX and RX Connect was to pins 0 and 1 in arduino or 8 and 9, DE is always PIN 2.

                            alt text

                            BartB 1 Reply Last reply
                            0
                            • H Offline
                              H Offline
                              hek
                              Admin
                              wrote on last edited by
                              #109

                              Looks like you got the pins to the Arduino wrong.

                              Pin 9 >>> DI
                              Pin 8 >>> RO
                              Pin 2 >>> DE and RE

                              elektro12345E 1 Reply Last reply
                              0
                              • H Offline
                                H Offline
                                hek
                                Admin
                                wrote on last edited by
                                #110

                                I need a nice picture done in fritzing (or similar) for an article on the main site on how to connect the RS485 module (atmega 328 enough I guess).

                                Anyone volunteering in making one?

                                1 Reply Last reply
                                0
                                • CrankyCoderC Offline
                                  CrankyCoderC Offline
                                  CrankyCoder
                                  wrote on last edited by
                                  #111

                                  so this is a 1 to 1 setup right? There is nothing here for multiple serial nodes correct?

                                  Home Automation Tinkerer
                                  www.CrankyCoder.net

                                  Controller: HomeAssistant in Kubernetes
                                  Gateway: MQTTClientGateway
                                  MySensors: 2.3

                                  1 Reply Last reply
                                  0
                                  • H Offline
                                    H Offline
                                    hek
                                    Admin
                                    wrote on last edited by
                                    #112

                                    Aren't they just daisy chained?

                                    1 Reply Last reply
                                    0
                                    • H hek

                                      Looks like you got the pins to the Arduino wrong.

                                      Pin 9 >>> DI
                                      Pin 8 >>> RO
                                      Pin 2 >>> DE and RE

                                      elektro12345E Offline
                                      elektro12345E Offline
                                      elektro12345
                                      wrote on last edited by elektro12345
                                      #113

                                      @hek
                                      On the pictures is connect to TX and RX pins arduino but I tried to connect to pins 8,9,2 and result was the same :(
                                      On thsi connections with pins 8,9,2 ofcourse and library mysensors 2.0 should works fine ?

                                      1 Reply Last reply
                                      0
                                      • H Offline
                                        H Offline
                                        hek
                                        Admin
                                        wrote on last edited by
                                        #114

                                        Yes, people have reported the RS485 transport working above.

                                        I just created this article with a summary of this thread
                                        https://www.mysensors.org/build/rs485

                                        1 Reply Last reply
                                        0
                                        • elektro12345E elektro12345

                                          Hello,
                                          I have a problem running gatewayserial to rs-485 and the node with the usual lightsensor.
                                          NODE # 1 as a gateway and tried to upload a sketch of the library 2.0 and 1.5.4, and the monitor serial I can not see any data, I use to check on the serial PuTTy com6 because the converter rs-485 to USB is connected to the PC.

                                          NODE # 2 as a light sensor, during the upload Sketch by arduino programmer for serial monitor can see the data being sent but after plugging arduino to rs-485 as below no longer visible.

                                          My question is whether I have something wrong with the connection or sketch, can someone show an example of a complete sketch for the gateway, and a node?

                                          Connection mine looks like this:
                                          TX and RX Connect was to pins 0 and 1 in arduino or 8 and 9, DE is always PIN 2.

                                          alt text

                                          BartB Offline
                                          BartB Offline
                                          Bart
                                          wrote on last edited by
                                          #115

                                          @elektro12345

                                          So what's with the DE+RE pins on that USB-RS485 converter? Will it even work in this configuration? I do have such converter but so far I've used the arduino as a SerialGateway to connect to RPi.

                                          elektro12345E 1 Reply Last reply
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