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How secure is this? Or, rather, how easy would it be for someone else to hack into my system, If I had to use this to open the gate and deactivate the alarm system?
Hi, Have you been able to read 3 different sensors's temp, individually and display the different temps? i.e. for example "fishtank temp", "room temp" and "outside temp"?I am trying to achieve this, using some other samples on the internet but data is very irregular, i.e. I get readings every now and then. When there's only 1 sensor connected, it's stable though. My wiring is similar to yours, except that I don't use an LCD, so the sensor is connected directly to pin 10, with a 4.7K resistor between the 5V+ line and the sensor data line.
Hi, Have you been able to successfully read, say 3 or 4 DS18B20 sensors, and "address" them individually?i.e. as example "inside temp", "outside temp" and "device temp"?
Did you measure the current draw of the LinkIt One? I want to know what the max current draw is of this board as I also need to build a solar power solution
Hi, Why didn't you use the Thinkspeak library? It seems to be much easier than coding all the HTPP requests.
I have tried your code, but it doesn't upload the temperature data to the MediaTek Sandbox. Can you please send the correct code?
Thanx. That's very helpful. Have you managed to store the data on a IOT server, something like enomcms or MediaTek Lab's MCS?
Thanx for the tutorial. Do you possibly have a DS18B20? I'm looking for some same sample code to read and upload temperatures from a DS18B20 to the MediaTek cloud.
Why do you divide the sensor value by 9.31?
Ok, so it seems the IC was using, was faulty. Got a couple new ones and it now works. But I picked up something else. It's seems the IC's are about 3 degress Celcius lower than "commercial digital thermometers". I tested 2 different commercial thermometors, on the same surface and they were about 0.2 degrees Celsius different. But the DS18B20 on the same surface was 3 degrees lower (i.e. 30.9C VS 33.2C). Have you noticed the same? Is there any way to calibrate it to be more accurate? I guess the 4K7 reristor and wire plays a role, but in this case I used some jumper wires to a bread board - very short distance. The commercial ones I have: one is an "in ear thermometer" and the other has a 0.5m cable on the sensor, but I have no idea which make/model sensors are used.
where's the code to read the temperature?
I have tried your tutorial, with the OneWire library you mentioned but keep can't read the temperature. Since I don't have an LCD, I modified your code a bit to print everything out on the serial monitor and got the following error:"No more sensors". so it's not seeing the DS18B20, even though I have 3 new ones and tried all three. Any suggestions?
Hi, Is is possible to go further than 1.8Km?
Long range, 1.8km, Arduino to Arduino wireless communication with the HC-12.
DIY 2G/3G/4G wireless cell phone signal booster
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