So I just started using these little devices which after a while are pretty cool. I don’t code much but can understand most code that is written and tweak it to what I want to do.
Currently I followed a tutorial that is using a digital sensor to measure the temperature. This is cool. I got it up and running no problems.
HOWEVER. there is 1 problem that i have discovered after using it quite a bit. I have my data posted to ubidots and it gives me incorrect data only sometimes. I post the data of the temp 1 time a minute.
Here is the tutorial i followed
The problem I have is, it sometimes gives me a -127 Celsius temp sometimes which skews my entire graph and what I am trying to do.
My project is i live in a cold flat in Scotland and the landlord doesn’t want to insulate it nor can he if he wanted to because it is a really old complex protected by the government from being changed.
So I hate getting up in the morning when its freezing in my room. I hate getting up in general; cold just makes it worse. So I took this example and it is posting the data to Ubidots then I have an alert it sends back to the particle if its under a certain temperature to turn on my heater IF its past 6AM giving it enough time to warm my room up before I get up.
Below is some sample data that I have pulled over the past hour from my device and in it you will notice the -127. Originally without the resistor I was getting a constant -127 but as soon as I added the pull up resistor it started working.
I can not find any correlation in it. I can have it update 1 time a second or 1 time an hour and it can still happen. Obviously if I post more often the -127 will show more often.
What am I doing wrong. my code is exactly as the example shown with the exception of the device ID’s
I have tried my other particle as well and same problem. Tried on a different pin same thing. Is there a bug in the code I am not seeing?
I did notice one thing if I updated every second sometimes my particle for some reason couldn’t handle it. It would crash blink red; restart and start working again.
Googling a few people had similar issues but not exactly so they didn’t really help in solving the situation
2015-10-21 23:31:18 +0100 22.0625
2015-10-21 23:30:16 +0100 22.0625
2015-10-21 23:29:15 +0100 -127
2015-10-21 23:28:13 +0100 22
2015-10-21 23:27:12 +0100 21.9375
2015-10-21 23:26:10 +0100 21.9375
2015-10-21 23:25:08 +0100 21.875
2015-10-21 23:24:07 +0100 21.875
2015-10-21 23:23:05 +0100 -127
2015-10-21 23:22:04 +0100 21.8125
2015-10-21 23:21:02 +0100 -127
2015-10-21 23:20:00 +0100 21.75
2015-10-21 23:18:59 +0100 21.75
2015-10-21 23:17:57 +0100 21.6875
2015-10-21 23:16:55 +0100 21.625
2015-10-21 23:15:53 +0100 21.6875
2015-10-21 23:14:52 +0100 21.625
2015-10-21 23:13:50 +0100 21.625
2015-10-21 23:12:48 +0100 21.625
2015-10-21 23:11:47 +0100 21.5
2015-10-21 23:10:45 +0100 21.5
2015-10-21 23:09:44 +0100 21.4375
2015-10-21 23:08:42 +0100 21.375
2015-10-21 23:07:40 +0100 21.3125
2015-10-21 23:06:39 +0100 21.3125
2015-10-21 23:05:37 +0100 21.25
2015-10-21 23:04:36 +0100 21.1875
2015-10-21 23:03:34 +0100 21.125
2015-10-21 23:02:32 +0100 21.0625
2015-10-21 23:01:31 +0100 21
2015-10-21 23:00:29 +0100 20.875
2015-10-21 22:59:28 +0100 20.8125
2015-10-21 22:58:26 +0100 20.75
2015-10-21 22:57:24 +0100 20.625
2015-10-21 22:56:23 +0100 20.5
2015-10-21 22:55:21 +0100 20.4375
2015-10-21 22:54:19 +0100 20.25
2015-10-21 22:53:17 +0100 20.0625
2015-10-21 22:52:16 +0100 19.8125
2015-10-21 22:49:02 +0100 19.0625
2015-10-21 22:48:01 +0100 18.75
2015-10-21 22:46:59 +0100 18.375
2015-10-21 22:45:55 +0100 -127
2015-10-21 22:44:53 +0100 17.6875