The Scout project is about precision farming to get better impression of tomato cultivation inside greenhouses. The HTES Centre of Expertise was involved WP4 of the Scout project to develop a protoype sensorgrid and an dashboard. The main research question was “How to measure tomato growth in a greenhouse?” To enable precision farming in a tomato greenhouse an sensornetwork or -grid is needed. The challenges for developing the grid are: energy efficiency, measurement accuracy, robustness and scalability.
The sensorgrid is fixed with many cheap sensornodes that sends their data wireless, but also measure at different levels in the greenhouse. A sensornode can be perceive as a measurement point, located at one point in 3D space. It should measure temperature (T), humidity (RH), carbon dioxide (CO2), light intensity (Lux) and volatile organic compounds (VOC) with intervals of ~10 minutes. In addition to the fixed grid also mobile sensornode (AGV-like) moves autonomously between the tomato plants and measures the micro climate (temperature, relative humidity, CO2 and PAR, and might measure lux and VOC).
The network is implemented by two types of sensorstrings. One according a cluster topology LoraWAN with Arduino MKR WAN 1300 transmission device. The second as a Star topology using the Texas Instruments CC1310 as RF device. Each sensorstring contains a transmitting device for wireless transmission to a data collector and three sensor nodes each one at one of the three levels. The connections between the three levels is wired, because of maintaining and powering the nodes. Transmission with CC1310 and MKR WAN1300 is done at 868 MHz which works best in a greenhouse.
01/03/2017 till 31/07/2019