There is currently a very high demand OpenSprinklern3.0/3.2. New goods are on the way, but the subsequent deliveries are already being covered by the outstanding sales. Unfortunately, this means longer delivery times. The import process from the USA is subject to customs processing times. There's no telling how long it takes. Sometimes it's just hours, sometimes it's weeks.
Therefore, please consider the possibility of complete OpenSprinkler PI with Raspberry PI to acquire.