proiecte:environment-monitoring
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proiecte:environment-monitoring [2018/06/07 16:28] cristian.cocioaba [Solar energy harvesting] |
proiecte:environment-monitoring [2018/06/07 16:37] (current) cristian.cocioaba headers |
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| ===== Gathering data ===== | ===== Gathering data ===== | ||
| - | === Temperature and humidity === | + | ==== Temperature and humidity |
| <code cpp> | <code cpp> | ||
| Line 79: | Line 79: | ||
| </ | </ | ||
| - | === Battery === | + | ==== Battery |
| <code cpp> | <code cpp> | ||
| typedef float sensor_battery_t; | typedef float sensor_battery_t; | ||
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| ===== Usage === | ===== Usage === | ||
| - | === Software serial example on Sparrow === | + | ==== Software serial example on Sparrow |
| <code cpp> | <code cpp> | ||
| #include < | #include < | ||
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| Although both protocols operate at 2.4 GHz frequency, 802.15.4 is low-speed and low-rate and ATmega128RFA1 has Ultra Low Power consumption as we can see below. | Although both protocols operate at 2.4 GHz frequency, 802.15.4 is low-speed and low-rate and ATmega128RFA1 has Ultra Low Power consumption as we can see below. | ||
| - | == ATmega128RFA1 power consumption == | + | === ATmega128RFA1 power consumption === |
| {{: | {{: | ||
| - | == ESP8266 power consumption when radio is on == | + | === ESP8266 power consumption when radio is on === |
| In contrast, ESP8266 has more processing power and together with the power required by the bandwidth and data rate of Wi-Fi, it utilizes almost 10 times more energy, as we can see below. | In contrast, ESP8266 has more processing power and together with the power required by the bandwidth and data rate of Wi-Fi, it utilizes almost 10 times more energy, as we can see below. | ||
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| This a good improvement over the previous consumption when running continuously, | This a good improvement over the previous consumption when running continuously, | ||
| + | |||
| ===== Optimizing power consumption ===== | ===== Optimizing power consumption ===== | ||
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| ===== Results ===== | ===== Results ===== | ||
| - | {{: | + | For testing the theoretical results, we measured the voltage of the VCC voltage from the ESP. It was connected to a 3800mAh LiPo battery, which was charged from the solar panel. |
| + | |||
| + | We present in the figure below tree days of measurement, | ||
| + | |||
| + | {{ : | ||
| + | The voltage increases at the first day sunrise, followed by a discharge at night. After that, we encountered a cloudy weather, followed by another sunny day, which kept the battery fully charged. Our test suggests that the theoretical results are correct and that the ESP can run on battery and harvest solar energy. | ||
| ===== Resources ===== | ===== Resources ===== | ||
| - [[https:// | - [[https:// | ||
proiecte/environment-monitoring.1528378128.txt.gz · Last modified: 2018/06/07 16:28 by cristian.cocioaba
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