Timeline for Trouble reading LM35 with long (?) Ethernet connection
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| S Jan 7, 2019 at 8:24 | history | suggested | Glorfindel | CC BY-SA 4.0 |
broken image fixed (click 'rendered output' to see the difference); for more info, see https://gist.github.com/Glorfindel83/9d954d34385d2ac2597bbe864466259f
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| Jan 7, 2019 at 7:15 | review | Suggested edits | |||
| S Jan 7, 2019 at 8:24 | |||||
| Jan 2, 2017 at 19:05 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Dec 3, 2016 at 16:20 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Nov 3, 2016 at 14:31 | answer | added | Gwyn | timeline score: 1 | |
| Nov 2, 2016 at 23:32 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 3, 2016 at 22:54 | history | bumped | Community Bot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Sep 4, 2016 at 22:10 | comment | added | CharlieHanson | At least you're using a twisted pair for signal/ground. I wonder if you'll see an improvement if you connect white-green to ground as well. | |
| Sep 3, 2016 at 22:43 | answer | added | Roberto Lo Giacco | timeline score: 0 | |
| Sep 3, 2016 at 12:21 | comment | added | gabelach | Sorry, I misunderstood your post. I am using the green, orange and white-orange conductors for 5V, ground and signal, respectively. The voltage received by the LM35 is around 4.2V and with a multimeter I do not see that kind of variance. The problem also remains if I change the analog inputs on Arduino. | |
| Sep 3, 2016 at 9:52 | comment | added | Majenko | 30C is quite a variation... you're looking at ±300mV variance in your analog signals. Check for loose connections in your wiring. Also check what voltage the LM35 receives on its power pin after the long run of Ethernet cable. | |
| Sep 3, 2016 at 9:07 | comment | added | CharlieHanson | I don't know; it depends on how you wire it. When I said "Ethernet wiring explicitly labeled" I meant for you to show the colours of the conductors you used. Not Fritzing's make-believe version: what YOU are actually using. | |
| Sep 3, 2016 at 8:57 | comment | added | gabelach | Thanks, the NRF24 is really nice, but I am afraid that I do not have enough space for its library on Arduino. But if I switch to a digital temp sensor wouldn't I face the same problem and need a line driver anyway? | |
| Sep 3, 2016 at 8:52 | history | edited | gabelach | CC BY-SA 3.0 |
added 212 characters in body
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| Sep 2, 2016 at 21:59 | comment | added | CharlieHanson | Can you show a schematic, preferrably with the ethernet wiring explicitly labelled. You might benefit from adding a line driver circuit to either end, or switch to a digital temperature sensor such as a DS18S20. Alternatively you could get some wonderfully cheap NRF24 modules and have everything wireless; that's worked for me. | |
| Sep 2, 2016 at 20:21 | review | First posts | |||
| Sep 3, 2016 at 8:08 | |||||
| Sep 2, 2016 at 20:21 | history | asked | gabelach | CC BY-SA 3.0 |