--- name: "psensor-server" section: "1" platform: "linux" package: "psensor" version: "1.2.1-5" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/psensor-server" --- # psensor-server(1) Temperature and system monitoring Web server ## NAME psensor-server - Temperature and system monitoring Web server ## SYNOPSIS **psensor-server** \[*OPTION*\]... ## DESCRIPTION psensor-server is an HTTP server for monitoring hardware sensors remotely. It provides a JSON Web service which can be used by [psensor(1)](/psensor/1.md) to monitor remotely the hardware sensors of a computer. It can provide information about:\ \* the temperature of the motherboard and CPU sensors (using lm-sensors).\ \* the temperature of the Hard Disk Drives (using hddtemp).\ \* the rotation speed of the fans (using lm-sensors). It is also possible to connect to the psensor-server with a browser, a simple Web page is displaying the sensors information and the CPU usage. The URL http://hostname:3131/api/1.0/sensors/\[id\] returns a JSON object containing all information about a sensor. \[id\] is the uniq identifier of the sensor. Here is an example of the JSON object of type 'sensor': { "id": "lmsensor acpitz-virtual-0 temp1", \ "name": "temp1", \ "type": 257, \ "min": 47.800000, \ "max": 60.800000,\ "measures": \[ { "value": 47.800000, "time": 1311374873 },\ { "value": 49.800000, "time": 1311374878 },\ { "value": 49.800000, "time": 1311374883 } \],\ "last\_measure": { "value": 49.800000, "time": 1311374883 } } Fields of the type 'sensor': \* id: the uniq identifier of the sensor.\ \* name: a humean readable name of the sensor (might not be uniq).\ \* type: the type of sensor. Look at src/lib/psensor.h for the\ different types.\ \* min: the minimal value of the sensor.\ \* max: the maximal value of the sensor.\ \* measures: all measures of the sensor.\ \* last\_measure: the last value of the sensor.\ \* time: the time of a measure as the number of seconds since\ 1970/01/01. The URL http://hostname:3131/api/1.0/sensors returns a JSON array containing all JSON objects of type 'sensor'. psensor-server can be stopped by sending an HTTP request with the URL 'http://hostname:port/api/1.0/server/stop'. ## OPTIONS - **-h**, **--help** display this help and exit - **-v**, **--version** display version information and exit - **-p**,--port=PORT webserver port - **-w**,--wdir=DIR directory containing webserver pages - **-d**, **--debug**=*LEVEL* set the debug level, integer between 0 and 3 - **-l**, **--log-file**=*PATH* set the log file to PATH **--sensor-log-file**=*PATH* set the sensor log file to PATH **--sensor-log-interval**=*S* set the sensor log interval to S (seconds) ## SENSOR LOG FILE Sensors can be logged using the --sensor-log-file option. It is using a text format, each line is terminated with a NEWLINE char. The first line is: I,%D,%V %D is the starting time of the log expressed as the number of seconds since EPOC. %V is the version of psensor-server. Following lines gives the ordered list of sensors: S,%I,%T %I is the uniq identifier of the sensor. %T is the hexadecimal representation of the sensor type. Then, the values of all sensors are written: %D,%V... %D is the number of seconds elapsed since the starting time of the log. %V... is the list separated by a comma of the current value of all sensors. The ordering is the same than the list of sensor identifiers. The value is expressed as a float with one digit precision. Temperatures are using Celsius unit. The value is written only if it has changed. Example: I,1345974927,0.7.0.4 S,lmsensor coretemp-isa-0000 Physical id 0,101 S,lmsensor coretemp-isa-0000 Core 0,101 S,lmsensor coretemp-isa-0000 Core 1,101 0,37.0,37.0,36.0 5,36.0,,36.0 Five seconds after the log starts, the temperature of the second sensor (Core 0) is still 37C. ## WARNING psensor-server does not provide any way to restrict the connection to the HTTP server, worst, no effort has been made against malicious HTTP attacks. You should make the psensor-server port available only to a network or computer you trust by using the usual network security tools of the system (for example, [iptables(8)](/iptables/8.md) ). ## REPORTING BUGS Report bugs to: jeanfi@gmail.com psensor home page: \ ## COPYRIGHT Copyright © 2010-2012 jeanfi@gmail.com License GPLv2: GNU GPL version 2 or later \\ This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. ## SEE ALSO [psensor(1)](/psensor/1.md), [sensors(1)](/sensors/1.md), [sensors-detect(8)](/sensors-detect/8.md)