Customer:
The product packaging says it comes with comprehensive documentation, but I can’t find any link to it anywhere. Could you please send me some instructions?
Original message (Croatian)
Piše na proizvodu da stiže uz opsežnu dokumentaciju, ali nigdje ne nalazim neki link, možete li mi molim vas poslati neke upute? Unaprijed hvala 
Originally submitted via email support on 6 March 2025. Migrated to the forum for community visibility.
Soldered Support:
Here is the Arduino library:
You need to install the library and then you can use it within Arduino. Depending on which version you have, check the example - it contains everything you need to get started: Soldered-RFID-Reader-125kHz-Arduino-Library/examples/readTagIDWithEasyC/readTagIDWithEasyC.ino at main · SolderedElectronics/Soldered-RFID-Reader-125kHz-Arduino-Library · GitHub
Original message (Croatian)
hvala na upitu! Radimo na dokumentaciji za naše proizvode trenutno
Ovdje je Arduino library:
GitHub - SolderedElectronics/Soldered-RFID-Reader-125kHz-Arduino-Library · GitHub
Potrebno je library instalirati i onda se može koristiti unutar Arduina. Ovisno o tome koju verziju imaš, pogledaj example, on sadržava sve što je potrebno za početak rada: Soldered-RFID-Reader-125kHz-Arduino-Library/examples/readTagIDWithEasyC/readTagIDWithEasyC.ino at main · SolderedElectronics/Soldered-RFID-Reader-125kHz-Arduino-Library · GitHub
Nadam se da pomaže, javi ako zapne negdje
Customer:
Good, thanks. I couldn’t find this on the store page and it’s nicely explained how the baud switches work. Now, are there any connection diagrams? The board has two sets of pins, and I’ve never heard of some of them (UPDI?) so I don’t know what I actually need to connect where.
Original message (Croatian)
Odlično, hvala. Na stranici od trgovine ovo
nisam mogao naći i tu je lijepo objašnjeno kako rade switchevi
za baud. E sad, postoje li dijagrami spajanja? Na ploči su mi
dva seta pinova od kojih za dio nisam nikad čuo (UPDI?) pa ne
znam što zapravo trebam spojiti gdje. Unaprijed hvala!
Srdačni pozdravi,
[name removed]
Soldered Support:
Which version do you have? For the easyC version you can only use the easyC cable (it carries power and I2C lines) - or you can use the SCL, SDA, VCC and GND pins for manual I2C connection.
For the UART version you need to connect the GND, VCC, RXD and TXD pins.
The interrupt for both cases is optional. The GND/UPDI/3V3 pins are for programming the ATTiny microcontroller located on the board and do not need to be touched.
Original message (Croatian)
nema na čemu
Koju verziju imaš? Za easyC verziju možeš koristiti samo easyC kablić (on nosi napajanje i I2C linije) - ili možeš koristiti SCL, SDA, VCC i GND pinove za ručno I2C spajanje.
Za UART verziju moraš spojiti GND, VCC, RXD i TXD pinove.
Interrupt za oba slučaja je opcionalan. GND/UPDI/3V3 pinovi služe za progarmiranje ATTiny mikroupravljača koji se nalazi na pločici te se ne moraju dirati.
Nadam se da ovo pomaže, sve ove stvari će biti bolje dokumentirane u našem novom sustavu za dokumentaciju na kojem radimo 
Customer:
Let me better define what I’ve investigated. First I wasted too much time because I was convinced those baud pins change the address, but that obviously wasn’t the case. When I connect one reader in parallel, it works. When I connect multiple, only one works. It says below that the I2C address is custom. Is it possible that they all have the same address? Are there similar ones but with different addresses? Is there a way to find out the address?
Original message (Croatian)
Evo da bolje definiram što sam istražio.
Prvo sam previše vremena izgubio jer sam bio uvjeren da oni baud
pinovi mijenjaju adresu, ali to očito nije bio slučaj. Kad
paralelno spojim jedan reader, on radi. Kad ih spojim više, radi
samo jedan.
Ispod piše da je i2c address custom. Jel
moguće da svi imaju istu adresu? Postoje li isti takvi ali s
drugačijim adresama? Ima li način da saznam adresu?
Soldered Support:
If you want to use two RFID readers on the same device via easyC - they must have their own separate I2C addresses. The I2C address of the RFID breakout is determined by the ADDR switch on the board.
You can move one of the switches and that RFID board will be on a different I2C address, then in the begin function for that sensor object define the address that is set: Soldered-RFID-Reader-125kHz-Arduino-Library/examples/readTagIDWithEasyC/readTagIDWithEasyC.ino at ff5c9926ee88fadd927d5e7ddb0c60fba8332995 · SolderedElectronics/Soldered-RFID-Reader-125kHz-Arduino-Library · GitHub
This way you can have multiple sensors connected to the I2C pins.
You can easily determine if you have everything connected correctly via I2C using this I2C scanner sketch which will search through all I2C addresses and print the ones found via Serial Monitor: Soldered-Hacky-Codes/I2C_Scanner/I2C_Scan/I2C_Scan.ino at main · SolderedElectronics/Soldered-Hacky-Codes · GitHub
Original message (Croatian)
super što radi 
Ako želiš koristiti dva RFID čitača na istom uređaju preko easyC - oni moraju imati svoje zasebne I2C adrese. I2C adresa RFID breakouta se određuje sa ADDR prekidačem koji je na pločici.
Možeš tako pomaknuti jedan od prekidača i ta RFID pločica će biti na drugoj I2C adresi, i onda u begin funkciji za taj objekt sentora definiraj tu adresu koja je postavljena: Soldered-RFID-Reader-125kHz-Arduino-Library/examples/readTagIDWithEasyC/readTagIDWithEasyC.ino at ff5c9926ee88fadd927d5e7ddb0c60fba8332995 · SolderedElectronics/Soldered-RFID-Reader-125kHz-Arduino-Library · GitHub
Tako možeš imati više senzora spojenih za I2C pinove.
Možeš lako odrediti imaš li dobro spojeno sve preko I2C-a sa ovim I2C scanner sketchom koji će pretražiti sve I2C adrese i preko Serial monitora ti ispisati koje su pronađene: Soldered-Hacky-Codes/I2C_Scanner/I2C_Scan/I2C_Scan.ino at main · SolderedElectronics/Soldered-Hacky-Codes · GitHub
Nadam se da je to sve što je potrebno
cilj nam je ovo sve imati u novoj dokumentaciji za proizvode na kojoj radimo.