M5Stack Community
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Register
    • Login

    Multiple RFID (RC522) reader via Grove Hub

    Units
    3
    12
    21.0k
    Loading More Posts
    • 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.
    • m5-docsM
      m5-docs @falmasi
      last edited by

      @falmasi
      Hub just for direct connection.

      M5Stack documentation URL

      https://docs.m5stack.com

      1 Reply Last reply Reply Quote 0
      • F
        falmasi @ajb2k3
        last edited by

        @ajb2k3 Thaks, and can I change the default address?

        ajb2k3A 1 Reply Last reply Reply Quote 0
        • ajb2k3A
          ajb2k3 @falmasi
          last edited by

          @falmasi said in Multiple RFID (RC522) reader via Grove Hub:

          @ajb2k3 Thaks, and can I change the default address?

          I don't know as I don't have one.
          I was taking a guess based on i2c protocol.

          UIFlow, so easy an adult can learn it!
          If I don't know it, be patient!
          I've ether not learned it or am too drunk to remember it!
          Author of the WIP UIFlow Handbook!
          M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

          1 Reply Last reply Reply Quote 0
          • m5-docsM
            m5-docs
            last edited by

            It can not be change the iic address. It has been defined by hardware of RFID module in RFID Unit.

            Here's the description about IIC address

            0_1547532220523_TIM截图20190115095742.png

            M5Stack documentation URL

            https://docs.m5stack.com

            ajb2k3A 1 Reply Last reply Reply Quote 0
            • ajb2k3A
              ajb2k3 @m5-docs
              last edited by

              @watson said in Multiple RFID (RC522) reader via Grove Hub:

              It can not be change the iic address. It has been defined by hardware of RFID module in RFID Unit.

              Here's the description about IIC address

              0_1547532220523_TIM截图20190115095742.png

              ah, so in this case, @falmasi will need to use an i2c expander.
              Something like the TCA9548A to use multiple devices on one port.
              link text
              New product idea for M5Stack?

              UIFlow, so easy an adult can learn it!
              If I don't know it, be patient!
              I've ether not learned it or am too drunk to remember it!
              Author of the WIP UIFlow Handbook!
              M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

              F 1 Reply Last reply Reply Quote 0
              • F
                falmasi @ajb2k3
                last edited by

                @ajb2k3
                We have tried to connect two RFID reader (https://www.aliexpress.com/item/M5Stack-Newest-Mini-RFID-Unit-RC522-Module-Sensor-for-Arduino-SPI-Writer-Reader-IC-Card-with/32963407976.html?spm=2114.search0104.3.1.3f74370dX6jROf&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_319_317_10696_10084_453_454_10083_10618_431_10304_10307_10820_10821_537_10302_536_10059_10884_10887_100031_321_322_10103,searchweb201603_54,ppcSwitch_0&algo_expid=9d7bf1a6-ea97-478a-b8e1-8c3779fd0235-0&algo_pvid=9d7bf1a6-ea97-478a-b8e1-8c3779fd0235&transAbTest=ae803_5) with an IO Expander
                (https://www.aliexpress.com/store/product/M5Stack-Official-Extend-Serial-IO-I-O-Unit-Grove-Cable-I2C-Interface-for-Arduino-Blockly-ESP32/3226069_32966582585.html?spm=a2g1y.12024536.productList_5885013.pic_8) with no success.
                Should it have to work?
                Thanks,

                1 Reply Last reply Reply Quote 0
                • ajb2k3A
                  ajb2k3
                  last edited by

                  No that is an I/O expander NOT an i2c expander.
                  you need an i2c expander like this.
                  link text

                  UIFlow, so easy an adult can learn it!
                  If I don't know it, be patient!
                  I've ether not learned it or am too drunk to remember it!
                  Author of the WIP UIFlow Handbook!
                  M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

                  m5-docsM 1 Reply Last reply Reply Quote 0
                  • m5-docsM
                    m5-docs @ajb2k3
                    last edited by

                    @ajb2k3
                    Thanks guy

                    We'll make this kind of device

                    M5Stack documentation URL

                    https://docs.m5stack.com

                    ajb2k3A 1 Reply Last reply Reply Quote 1
                    • ajb2k3A
                      ajb2k3 @m5-docs
                      last edited by

                      @watson said in Multiple RFID (RC522) reader via Grove Hub:

                      @ajb2k3
                      Thanks guy

                      We'll make this kind of device

                      Lol, I can give you loads of product ideas!

                      UIFlow, so easy an adult can learn it!
                      If I don't know it, be patient!
                      I've ether not learned it or am too drunk to remember it!
                      Author of the WIP UIFlow Handbook!
                      M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

                      m5-docsM 1 Reply Last reply Reply Quote 0
                      • m5-docsM
                        m5-docs @ajb2k3
                        last edited by

                        @ajb2k3
                        Appreciate you!

                        M5Stack documentation URL

                        https://docs.m5stack.com

                        1 Reply Last reply Reply Quote 1
                        • First post
                          Last post