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  1. nfds

    Water Pump

    I need a simple water pump to be used in a home made project! Just the more simple the best! Just need something to water the plants!
  2. nfds

    Water Pump

    Hi guys! I need a little help to choose a water pump for my project! I'm using the ez430-rf2500 kit which has a msp430f2274 micro controller! I just need a water pump to irrigate plants! I also have a soil moisture sensor and I need a water pump so when the soil moisture reaches a certain threshold the water pump should be turned on for watering the plant! I need a simple pump to do that! I've been searching for a water pump in the web but as a newbie i'm not sure which to choose! Can anybody help me please? Thanks in advance!
  3. I've tested it but the read values are not in the range which is given in the moisture sensor wiki. It is suppose to be something like this: Value range: 0 ~300 : dry soil 300~700 : humid soil 700~950 : in water But in my case i get the value of 78 when the sensor is OUT of the water and a value of 113 when the sensor is IN the water! What am i doing wrong? My code is the following: ADC10CTL1 = INCH_0; ADC10CTL0 = ADC10IE + ADC10ON + ADC10SHT_2 + SREF_0; for( degC = 240; degC > 0; degC-- ); // delay to allow reference to settle ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion
  4. Hi, I'm starting the development of a wireless sensor network using the ez430-rf2500 kit. My goal is to measure soil humidity with a soil moisture sensor in each device of the network. The soil moisture sensor i'm using is the following: http://www.dfrobot.com/index.php?route=product/product&filter_name=soil%20moisture&product_id=599 . I'm having trouble integrating this sensor with the ez430-rf2500. I'm using the Temperature Sensor Monitor Demos as a basis for my project. But i don't understand this formula: degC = (((temp - 673) * 4230) / 1024); which converts the value read
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