Ds18b20 temp sensor - Custom OID help

Raspbianuser · 1 December 2023 19:59

Posted a bug report here:

Librenms temperature graphs spikes and disapears during winter climate

opened 07:58PM - 01 Dec 23 UTC

### The problem I have soldered a temp sensor (DS18B20) to my Raspberry Pi, and… a couple of weeks ago the graphs disappeared all the sudden. And I thought it was due to the the latest relasese. But after some testing it was the weather. The RPi stationed up on our loft here in Norway and it's quite cold. Hence I monitor the temperatures. So I moved the sensor on top of a Unifi switch inside a "data rack" and the temperature graphs came back. And to be sure, I have this python script that I use to check if there is something wrong with the connection or whatever, and the sensor has been online the whole time, but not able to graph. So in conclusion, Librenms can't handle temp graphing going from + Celcius, to - Celcius as far as I can document here. https://community.librenms.org/t/ds18b20-temp-sensor-custom-oid-help/22954/7 - Images and further documentation can be seen here. At least at the latest post, disregard the first ones as I thought I had other issues. ### Output of ./validate.php ```txt =========================================== Component | Version --------- | ------- LibreNMS | 23.11.0-13-g7630983b5 (2023-11-30T18:54:50+01:00) DB Schema | 2023_11_21_172239_increase_vminfo.vmwvmguestos_column_length (274) PHP | 8.2.12 Python | 3.9.2 Database | MariaDB 10.5.21-MariaDB-0+deb11u1 RRDTool | 1.7.2 SNMP | 5.9 =========================================== [OK] Composer Version: 2.6.5 [OK] Dependencies up-to-date. [OK] Database connection successful [OK] Database Schema is current [OK] SQL Server meets minimum requirements [OK] lower_case_table_names is enabled [OK] MySQL engine is optimal [OK] Database and column collations are correct [OK] Database schema correct [OK] MySQl and PHP time match [OK] Active pollers found [OK] Dispatcher Service not detected [OK] Locks are functional [OK] Python poller wrapper is polling [OK] Redis is unavailable [OK] rrd_dir is writable [OK] rrdtool version ok ``` ### What was the last working version of LibreNMS? _No response_ ### Anything in the logs that might be useful for us? _No response_