Benutzer-Werkzeuge
wifi_sensor
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen Revision Vorhergehende Überarbeitung Nächste Überarbeitung | Vorhergehende Überarbeitung | ||
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wifi_sensor [2015/04/08 00:49] dokuwikiadmin |
wifi_sensor [2017/04/04 06:43] (aktuell) karl [Research Links] |
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| Zeile 66: | Zeile 66: | ||
| - | The PCBs for the first batch of 50 pieces including an SMD stencil was kindly sponsored by WEdirekt | + | The PCBs for the first batch of 50 pieces including an SMD stencil was kindly sponsored by WEdirekt, the online shop for PCBs and stencils from Würth |
| - | [[http:// | + | [[http:// |
| ===== Hardware ===== | ===== Hardware ===== | ||
| * ATmega328 with 8MHz resonator (based on the Arduino Nano328) | * ATmega328 with 8MHz resonator (based on the Arduino Nano328) | ||
| Zeile 137: | Zeile 137: | ||
| ===== Hardware Details ===== | ===== Hardware Details ===== | ||
| - | Here you can download the current version of the schematic: | + | Here you can download the current version of the schematic, PCB files and the bill of materials:\\ |
| - | http://www.zeilhofer.co.at/documents/wifi-sensor/ | + | https://github.com/KarlZeilhofer/WolkenThermometer-kicad |
| ==== Measuring Battery Voltage ==== | ==== Measuring Battery Voltage ==== | ||
| We use the internal ADC and an external shunt reference (LM431SCCM32X, | We use the internal ADC and an external shunt reference (LM431SCCM32X, | ||
| Zeile 174: | Zeile 174: | ||
| The user allways can monitor the battery condition with the app for the smart phone. | The user allways can monitor the battery condition with the app for the smart phone. | ||
| ==== Battery Pack ==== | ==== Battery Pack ==== | ||
| - | The battery is assembled out of 3 pieces of AAA NiMH cells. In total we have nominal 3.6V and 800mAh. | + | < |
| + | The battery is assembled out of 3 pieces of AAA NiMH cells. In total we have nominal 3.6V and 800mAh.</ | ||
| + | Instead of the NiMH battery, a lithium battery will be used, since the NiMH type is not able to deliver enough current at cold temperatures. | ||
| If the solar panel delivers enough power, we can increase the data transmission frequency. If the thermometer is in a rather dark area, we reduce the frequency to save power. | If the solar panel delivers enough power, we can increase the data transmission frequency. If the thermometer is in a rather dark area, we reduce the frequency to save power. | ||
| - | Exact measurements on power consumption of the WiFi module and also the whole circuit it self have to be done, to calculate the optimum function for transmission rate. | + | Exact measurements on power consumption of the WiFi module and also the whole circuit it self have to be done, to calculate the optimum function for transmission rate. |
| ===== Firmware Details ===== | ===== Firmware Details ===== | ||
| + | Here you can find the source code on Github: \\ | ||
| + | https:// | ||
| ==== Structure ==== | ==== Structure ==== | ||
| Zeile 244: | Zeile 249: | ||
| * aes256: http:// | * aes256: http:// | ||
| * AVR Fuse Calculator http:// | * AVR Fuse Calculator http:// | ||
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wifi_sensor.1428446981.txt.gz · Zuletzt geändert: 2015/04/08 00:49 von dokuwikiadmin
Falls nicht anders bezeichnet, ist der Inhalt dieses Wikis unter der folgenden Lizenz veröffentlicht: CC Attribution-Share Alike 4.0 International
