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humidity sensor value

rozpruwacz last edited by rozpruwacz

Hey all,

i bought a dht-22 sensort and it shows about 20% less that expected (i did the salt test calibration), then i bought a dht-11 sensor and it shows even less, about 30% less than expected. searching the internet i didn't found people having such problems, all i can find that these devices are quite precisie. after calibration the values are ok, but what will happen if humidity drops below 20% ? or maybe it is problem with the library that reads these values ? i'm using the example sketch for humidity sensor.
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i had good experience with it. . .
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I am going to rework the system so it uses an Easy Pcb and a Pro Mini rather than the Leonardo board. I think I might be seeing a voltage drop in my point to point dupont wiring from the Arduino to the Radio. I'll update you all once I get a chance to make the change. Bill
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@bjornhallberg The sensors are working fine and have been installed in my home for the last couple of years. Some optimisation needs to be done to the code, that i have not done. This is more connected to understanding when the mysensors network is in "range" as i want to fallback on the manual knob if the mysensor network is inactive for some reason or if i sell the house and the controller goes with me.
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@NeverDie Thx for appreciating the work done. There will also be an open source part in the future. When and how extensive the open source part will be, remains to be seen. The release of certain information (block diagram, ..., in this post) is related to those open source parts. There are some OBD solutions, however most of them (in my experience) give back low frequency data put by the car manufacturer on the OBD-bus (CAN, ...). Therefore transients evolving directly from the battery could only be recorded if the manufacturer sends those data accordingly on the bus. Due to the small bandwidth(also because of other car data that have to be sent, ...), such battery data are sent more often once per second or less. Fast battery events (i.e. cranking events, ...) are therefore imperceptible. Unless the manufacturer processes the fast events and then sends them (once per second or less), which is very unlikely if the manufacturer does not market this feature itself. Third parties devices for high frequency sensing costs several hundreds dollars. In my experience, important battery states (especially the fast ones) are recorded by measuring and processing corresponding data directly on the battery. I agree with you about the limits related to the communication over Bluetooth. But i think Bluetooth 5.0 will improve a lot. However, WiFi will always remain an important option due to the high data throughput. The combination of both (BLE & WiFi), especially with regard to energy consumption, will gain in importance.
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Did you guys managed to have it working with latest mysensors version?

humidity sensor value

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