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| + | ====== GCA41 Arduino nano shield RFID-interface for RC522 ====== | ||
| + | |||
| + | [[english|{{ rocrail-logo-35.png}}]] | ||
| + | |||
| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#interfaces|GCA]] | ||
| + | * [[mgv-overview-en|The GCA modules]] | ||
| + | {{ :gca:gca41_pict01.gif?200}} | ||
| + | \\ | ||
| + | |||
| + | ^^^^By Peter Giling ^^^^ | ||
| + | |||
| + | ===== 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 securety, 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 LNet 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 LNet, please refer to {{GCA51-en|GCA51}}.\\ | ||
| + | \\ | ||
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| + | |||
| + | \\ | ||
| + | |||
| + | ===== Hardware ===== | ||
| + | | {{:gca:gca41_sch.pdf|Schematics}} | | ||
| + | | {{:gca:gca41_pcb.pdf|The pcboard and parts positions}} | | ||
| + | \\ | ||
| + | ^ 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 | | ||
| + | \\ | ||
| + | |||
| + | ===== Firmware sources ===== | ||
| + | | {{:gca:rfid2_to_serial_2016.zip|The sources for Arduino Nano sketch}} | | ||
| + | \\ | ||
| + | **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 //rfid2_ser.ino.eightanaloginputs.hex// file.\\ | ||
| + | Download, install and execute the program Xloader here {{:http://www.hobbytronics.co.uk/arduino-xloader}}\\ | ||
| + | Then use it to program the hex. file via USB, no Arduino program needed.\\ | ||
| + | \\ | ||
| + | |||
| + | ====Libraries==== | ||
| + | * http://www.arduinolibraries.info/libraries/mfrc522 | ||
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| + | \\ | ||
| + | |||
| + | ===== How to connect and use RC522 RFID sensor board ===== | ||
| + | [[RC522-sensor-board.en|Click here for the RC522 page]] | ||
| + | {{ :gca:rc522_with_pss254-8w_connector.gif?150}} | ||
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gca41-en.txt · Last modified: 2018/11/12 08:56 (external edit)
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