In this report, the design choices made during the making of a water flow measuring sensor node are described and discussed to various extents. The node is to ultimately be deployed in South Sudan to monitor mini-water yards managed by the International Aid Services. A design using a hall effect water flow sensor, a microcontroller and a GSM modem is presented. Various lengths of SMS and HTTP messages are sent and the current signature they produce are compared to find out which transmission strategy is the most energy conservative. It is concluded that for a constant data volume, sending it in as few messages as possible is beneficial in terms of saving energy. It is also found that for short messages, SMS seems to be cheaper in energy compared to HTTP and the opposite is true for bigger messages. Avoiding actuators altogether has the potential to be beneficial in terms of battery life for a sensor node.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-147052 |
| Date | January 2018 |
| Creators | Levinsson, Johan |
| Publisher | Linköpings universitet, Institutionen för datavetenskap |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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