gca41-en
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| + | ====== GCA41 Arduino nano shield RFID-interface for RC522 ====== | ||
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| + | [[english|{{ | ||
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| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en# | ||
| + | * [[mgv-overview-en|The GCA modules]] | ||
| + | {{ : | ||
| + | \\ | ||
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| + | ^^^^By Peter Giling ^^^^ | ||
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| + | ===== Description ===== | ||
| + | Using RFID is very much a system that enables you to indicate all rolling stock on the rails, without\\ | ||
| + | the need of drawing power from the rails.\\ | ||
| + | RFID is widely known in all situations like security, shop lifting protection, and many others.\\ | ||
| + | RFID with Rocrail started with the idea of MERG in England , using ID-12 sensors.\\ | ||
| + | Rocrail reacted on that with the introduction of CAN-GC4 for CBUS, and with an input for \\ | ||
| + | the same ID-12 on the Raspberry Pi HAT GCA_PI01.\\ | ||
| + | The sensed information is transmitted with 9600 Bd.\\ | ||
| + | But the ID-12 is expensive and rather slow, and also it is very easy to disturb with the noise of \\ | ||
| + | the motor inside your locomotive.\\ | ||
| + | This is mainly due to the frequency of 125 KHz it is running on\\ | ||
| + | Now a better solution is optioned by using a rather cheap RC522. widely available around the world.\\ | ||
| + | It runs on 13.56 MHz, which makes a lot better protection against electrical motor noise,\\ | ||
| + | and also increases the reading speed sincerely.\\ | ||
| + | But that sensor type is not an active type like the ID-12, meaning that \\ | ||
| + | it will sense much faster the nearing of a tag, stores its number , but that's it.\\ | ||
| + | It will not pass this information through until it is asked for, so we need a bidirectional communication \\ | ||
| + | to get the value of the tag, and, if available, pass it through to CAN-GC4 and/or GCA_PI01.\\ | ||
| + | CAN-GC4 was not made for that, not possible even, and for LocoNet there was no solution anyway.\\ | ||
| + | The development of such a little interface was pretty easy since there are Arduino nano boards to fix that.\\ | ||
| + | This GCA41 board is just a shield for an Arduino Nano, creating an interface between RC522 sensor and CAN-GC4 or GCA_PI01.\\ | ||
| + | Communication between Nano and RC522 is done by SPI, which guarantees suitable speed .\\ | ||
| + | For use of RFID with LocoNet, please refer to [[GCA51-en|GCA51]].\\ | ||
| + | \\ | ||
| + | ===== Compatibility with 3,3V systems ===== | ||
| + | Up until now, only some WIO units are using 3,3V power.\\ | ||
| + | This board will not work with 3.3 V systems directly, only when RC522 receiver is made\\ | ||
| + | for it, and the GCA41 needs modification.\\ | ||
| + | Please ask [[peter.giling@rocrail.net| Peter ]] for advice..\\ | ||
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| + | \\ | ||
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| + | ===== Hardware ===== | ||
| + | | {{: | ||
| + | | {{: | ||
| + | \\ | ||
| + | ^ Partslist GCA41 ^^ | ||
| + | | R1 | Resistor 1 Kohm | | ||
| + | | R2 | Resistor 470 Ohm | | ||
| + | | C1 | Elco 100 µF minimum 16 Volt radial | ||
| + | | D1 | Led 3mm | | ||
| + | | S1 | PSS 254-3G | ||
| + | | RC522 | PSS 254-8G | ||
| + | | U1 | Arduino Nano | | ||
| + | \\ | ||
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| + | ===== Firmware sources ===== | ||
| + | | {{: | ||
| + | \\ | ||
| + | **Extra feature for Window users only! (as far as I know)**.\\ | ||
| + | To make it simple for programming the Nano.\\ | ||
| + | The zip file above also contains a // | ||
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| + | ====Libraries==== | ||
| + | * http:// | ||
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| + | \\ | ||
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| + | ===== How to connect and use RC522 RFID sensor board ===== | ||
| + | [[RC522-sensor-board-en|Click here for the RC522 page]] | ||
| + | {{ : | ||
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