Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen Revision Vorhergehende Überarbeitung Nächste Überarbeitung | Vorhergehende Überarbeitung | ||
wifi_sensor [2015/04/08 02:23] karl [Hardware Details] |
wifi_sensor [2017/04/04 06:43] (aktuell) karl [Research Links] |
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- | 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 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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+ | {{tag> | ||
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