Customer:
I have an RF module (XY-RM-5V receiver and FS1000A transmitter). Without a logic analyzer, I cannot measure the voltage on the data pin. Is it safe to connect the VCC pin of the receiver and transmitter to Raspberry Pi Model B pins 2 or 4 (5V), or is there a risk of damaging the RPi?
Original message (Croatian)
Molim za savijet, posijedujem RF modul (XY-RM-5V prijemnik i FS1000A
odašiljač) budući da nemam logic analyzer ne mogu izmjeriti napon na
data pinu. Da li sigurno spojiti VCC pin od prijemnika i odašiljača na
Raspberry Pi (Model B) pin 2,4 (5V) ili postoji mogućnost da se ošteti
RPi.
Hvala.
Originally submitted via email support on 19 January 2018. Migrated to the forum for community visibility.
Soldered Support:
The product details include voltage specifications: the receiver output is HIGH at 1/2 of VCC and LOW at 0.7V. The transmitter operates at 3V to 12V (higher voltage provides greater range).
Original message (Croatian)
na našem opisu proizvoda za navedeno možete pronaći detalje u vezi napona: https://e-radionica.com/hr/433mhz-rf-odasiljac-i-prijemnik.html
što Vas zanima nalazi se ovdje:
• Izlaz na prijemniku: HIGH - 1/2 od VCC, LOW - 0.7V
• Napon na odašiljaču: 3V - 12V (veći napon = veći doseg)
dakle, ukoliko pripazite na napone, možete ga bez tr
Customer:
I saw that data in the specifications (I cannot find a PDF online), but to clarify: if I connect VCC of the receiver to RPi pin 2 (which is +5V), the output on the DATA pin will be approximately 2.5V?
Original message (Croatian)
Moduli su inače na ručeni preko e-radionice.
Ma vidio sam taj podatak u specifikacijama (na internetu ne mogu pronaći
pdf), nego dal sam dobro shvatio znači ako na VCC od receiver spojim RPi
pin 2 (koji je +5V) izlaz na DATA pinu je ~2.5V, ili?
Soldered Support:
Yes, that’s correct. It should work without problems with the RPi.
Original message (Croatian)
Tako je 
dakle, bez problema bi trebao raditi s RPi.