Category Archives: Generally

dynamic irrigation control

There are no clear specifications or guidelines on how to implement dynamic weather control. In principle, the OpenSprinkler is just the tool, you have to work. That means trying things out until it works. Up until now, the weather service and the “Zimmermann” or “Evapotranspiration” adaptation type were a good way to dynamically implement weather-dependent control. Due to the […]

Example configuration Waveshare and SMT100 Modbus

The Waveshare instructions can be found here: https://www.waveshare.com/wiki/RS485_TO_ETH_(B) In principle, you just have to connect the Waveshare and install the software. Then set it up as follows: Start VirCom, “Device Management”, then the device should appear. Configure the device with “Edit Device”. You can freely choose the port, e.g. 502 or 8899 or completely different. Important: Firmware 2.3.0.(135) or [...]

Example configuration USR-W610 and Truebner SMT100 RS485 Modbus

The USR-W610 has the advantage that it also comes with the right power connection for the sensors. Up to 32 sensors can be connected to a Modbus port of a USR-W610 (at maximum expansion level, a more powerful power supply may be necessary). Currently only the Truebner SMT100, the Truebner Aquaflex and the Truebner T100 are supported in the RS485 Modbus versions. […]

Activate analog sensor configuration

1. Activating the UI The prerequisite is firmware version 2.3.0(x) (or newer) with Analog Sensor API extension. In order for your OpenSprinkler to use the analog sensor configuration, the UI configuration must be adjusted. Please note: There is no manufacturer support (from the USA) for the modified firmware, only via the German support page! a) OpenSprinkler […]

OpenSprinkler remote access with OpenThings Cloud (OTC) token

Note As of firmware 2.2.0, OpenSprinkler 3.x supports remote access via OTC tokens. Please note that this is only available for OpenSprinkler hardware 3.x, it is NOT available for OpenSprinkler hardware 2.x or OpenSprinkler Pi (NEW with firmware 2.3.1(161+) also with OSPi) / Beagle / Demo. Therefore, this article is only relevant for OpenSprinkler 3.x. For OpenSprinkler 3 […]

Analog sensors – expansion board

Coming soon: The new OpenSprinkler Analog Sensor Expansion Board! Features: 8 analog sensor inputs with the range 0..4V Outputs: 5V and GND for powering the sensors (7 additional 3.5V) Can also be combined with up to 4x zone expanders Maximum ONE analog sensor board per OpenSprinkler 3/3.2 16 bit digital analog to digital converter (2x ADS1115) Compatible e.g. […]

Simultaneous solenoid valves

We are asked the same question again and again: How many solenoid valves can the OpenSprinkler open at the same time. But the answer is always “it depends,” because the solenoid valves from different manufacturers have different performance values. I got to the bottom of the matter and did some exemplary tests. a) With the OpenSprinkler AC and the […]