GSM Alarm: How many wired doors and windows sensors support?

[admin]

Actually there is no limit for number of wired sensors. You can connect them in series or parallel for your convenience. there are 3 wired zones.

at this moment, the GSM Alarm supports NC by default. In the future version, it will enhance to accommodate both NC and NO configurable.

Any device that can generate standard alarm signal for alert will be supported.