There is now new board available called Node 1.3. It is small evolution of previous version 1.2. Mainly there are changes in IO Header pinout and possibility to add thermometer based on MCP7900A. MC7900A is linear active thermistor IC. That is analogue temperature sensor that converts temperature to analogue voltage. It’s a low-power sensor consuming 6 μA (typical operating current). And with little bit of calibration at room temperature it can provide ±0.5°C from 0°C to +70°C accuracy. Other then that some labelling was added and footprint of RS485 connector have changed.
Schematic is preset as usual in my download folder.
OHS is open Arduino based burglar alarm and automation platform. It can work as new alarm gateway, or it can replace your old alarm panel. OHS can use any wired 12V sensor, PIR, smoke or reed switch. It has Web interface that is used to set it up. OHS has GSM modem that is able to send SMS or page you. It has radio interface for environmental sensors. OHS is self-contained, it does not need any cloud service, only optional SMTP server for emails, or MQTT to publish collected sensor data.
Sunday, January 22, 2017
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