Fire ALarm protocol

Projects Networking, Protocols, and Devices
1

hi there does anyone know if an arduino uno can communicate with fire alarm detectors using "Apollo” and “Hochiki protocols it would only be 7 addressable detectors

i know fire alarms use 24v dc and was wondering if i could use optocouplers to take a signal to the arduino and transmit?

thanks alot

this is the only information i can find

TECHNICAL SPECIFICATION

Transmission Type Half duplex, serial asynchronous digital
2 wire, Voltage transmit, Current receive
Data format 8 data bits, 1 start and 1 stop bit
Data rate 1200 bits/second
Operating voltage Digital 0 - 24Vdc
Digital 1 - 32Vdc
Operating current Digital 0 - Loop current + 22mA
Digital 1 - Loop current + 0mA
Error checking Byte - Even parity
Message - 8 bit checksum
Command Types Polling, Control, Interrupt and Group
Polling rate 7.5 seconds per loop
Interrupt response time 1.5 seconds max., 1.0 seconds typ

2

just found this dont know if it helps

http://www.apollo-fire.co.uk/media/2863/pp2099_open,_closed_and_digital_protocols_-_what_does_it_all_mean_issue_4.pdf

3

You will probably need to sign a NDA (none disclosure agreement) to get actual details of their serial protocol. Ask them they might release it to you.