Reply To: Questions about the ports of OSPi 1.5 (COM, +5V, GND, SN1/2)

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August 23, 2020 at 0:24 #22308
Admin
Keymaster

Hello,

so:

1. 2x COM: These are both connected and only serve to simplify the wiring. If you have more than 20 solenoid valves, you should distribute them across both COM ports to reduce the current load on the contacts. Otherwise you can do this, but you don't have to.

2. 2A 24VAC Adapter: Yes, this also powers the Raspberri PI. Since version 1.5, this can be up to 10W (5V x 2A). This should be sufficient for most applications. However, if you connect high consumers like hard drives to the USB port, this will hardly be enough and you should connect the Raspberri PI adapter additionally.

3. Just do not connect the GND to the housing! The two signal inputs are switched via GND+SN1 or GND and SN2. So a signal is triggered when GND is present at SN1 or SN2. VIN or +5V is intended for connecting external sensors that require power, such as our soil moisture sensor.

Furthermore, we recommend taking a look at the OpenSprinkler firmware manual, which you can find in the download area. Here all connections are explained (they are the same as with the OpenSprinkler 3.2)