diff --git a/README.md b/README.md
index 448d1a6..7d21bd5 100644
--- a/README.md
+++ b/README.md
@@ -13,8 +13,7 @@ Run `obsdfreqd` as root, quit with `Ctrl+C`.
 # Installation
 
 `make install` as root, enable the service using `rcctl enable
-obsdfreqd` and set flags as you want using `rcctl set obsdfreqd
-flags -q` for example.
+obsdfreqd`.
 
 Start the service with `rcctl start obsdfreqd`.
 
@@ -25,7 +24,7 @@ Start the service with `rcctl start obsdfreqd`.
 Parameters are applied when both plugged on the wall or on battery, parameters can have two values comma separated to give different values when plugged on wall and for when on battery.
 
 - `-h` show usage
-- `-q` quiet mode, silence output
+- `-v` verbose mode, CSV output if one wants to create diagrams
 - `-d downstepfrequency` sets the steps removed every cycle when decaying, default to 100
 - `-i inertia` sets the number of cycles after which the frequency will decay, 0 is the default
 - `-m maxfrequency` sets the maximum frequency the CPU can reach in percent, 100% is default
diff --git a/main.c b/main.c
index f30be87..c9f2a3b 100644
--- a/main.c
+++ b/main.c
@@ -18,6 +18,7 @@ int inertia,	batt_inertia,	wall_inertia;
 int step,	batt_step,	wall_step;
 int timefreq,	batt_timefreq,	wall_timefreq;
 int temp_max,   batt_tmax,      wall_tmax;
+int verbose = 0;
 
 float get_temp(void);
 void set_policy(const char*);
@@ -58,7 +59,7 @@ void quit_gracefully(int signum) {
 }
 
 void usage(void) {
-    printf("obsdfreqd [-h] [-q] [-i cycles] [-l min_freq] [-m max_freq] [-d percent_down_freq_step] [-r threshold] [-s percent_freq_step] [-t milliseconds]\n");
+    printf("obsdfreqd [-h] [-v] [-i cycles] [-l min_freq] [-m max_freq] [-d percent_down_freq_step] [-r threshold] [-s percent_freq_step] [-t milliseconds]\n");
 }
 
 /* switch to wall profile */
@@ -121,7 +122,6 @@ int main(int argc, char *argv[]) {
     long cpu[CPUSTATES], cpu_previous[CPUSTATES];
     int frequency = 0;
     int current_mode;
-    int quiet = 0;
     int value, current_frequency, inertia_timer = 0;
     int cpu_usage_percent = 0, cpu_usage;
     float temp;
@@ -151,7 +151,7 @@ int main(int argc, char *argv[]) {
     //    err(1, "unveil failed");
     //unveil(NULL, NULL);
 
-    while((opt = getopt(argc, argv, "d:hi:l:m:qr:s:t:T:")) != -1) {
+    while((opt = getopt(argc, argv, "d:hi:l:m:r:s:t:T:v")) != -1) {
         switch(opt) {
         case 'd':
             assign_values_from_param(optarg, &wall_down_step, &batt_down_step);
@@ -173,8 +173,8 @@ int main(int argc, char *argv[]) {
             if(max > 100 || max < 0)
                 err(1, "maximum frequency must be between 0 and 100");
             break;
-        case 'q':
-            quiet = 1;
+        case 'v':
+            verbose = 1;
             break;
         case 'r':
             assign_values_from_param(optarg, &wall_threshold, &batt_threshold);
@@ -219,8 +219,13 @@ int main(int argc, char *argv[]) {
     signal(SIGTERM, quit_gracefully);
     set_policy("manual");
 
-    if (quiet == 0)
-        printf("mode;Temperature;maximum_frequency;current_frequency;cpu usage;inertia;new frequency\n");
+    if (verbose) {
+        if(temp_max > 0) {
+            printf("mode;Temperature;maximum_frequency;current_frequency;cpu usage;inertia;new frequency\n");
+        } else {
+            printf("mode;current_frequency;cpu usage;inertia;new frequency\n");
+        }
+    }
 
     /* avoid weird reading for first delta */
     if (sysctl(mib_load, 2, &cpu_previous, &len_cpu, NULL, 0) == -1)
@@ -233,7 +238,8 @@ int main(int argc, char *argv[]) {
         if (sysctl(mib_powerplug, 2, &value, &len, NULL, 0) == -1)
             err(1, "sysctl");
 
-        if(quiet == 0) printf("%i;", value);
+        if(verbose) printf("%i;", value);
+
         if(current_mode != value) {
             current_mode = value;
             if(value == 0)
@@ -252,13 +258,13 @@ int main(int argc, char *argv[]) {
                 if(max < 100)
                     max++;
             }
-            printf("%.0f;%i;", temp, max);
+            if(verbose) printf("%.0f;%i;", temp, max);
         }
 
         /* get current frequency */
         if (sysctl(mib_perf, 2, &current_frequency, &len, NULL, 0) == -1)
             err(1, "sysctl");
-        if(quiet == 0) printf("%i;", current_frequency);
+        if(verbose) printf("%i;", current_frequency);
 
         /* get where the CPU time is spent, last field is IDLE */
         if (sysctl(mib_load, 2, &cpu, &len_cpu, NULL, 0) == -1)
@@ -286,7 +292,7 @@ int main(int argc, char *argv[]) {
 
         cpu_usage_percent = 100-round(100*(cpu[5]-cpu_previous[5])/cpu_usage);
         memcpy(cpu_previous, cpu, sizeof(cpu));
-        if(quiet == 0) printf("%i;", cpu_usage_percent);
+        if(verbose) printf("%i;", cpu_usage_percent);
 
         /* change frequency */
         len = sizeof(frequency);
@@ -330,9 +336,8 @@ int main(int argc, char *argv[]) {
             }
         }
 
-        if(quiet == 0) printf("%i;%i;", inertia_timer, frequency);
+        if(verbose) printf("%i;%i\n", inertia_timer, frequency);
 
-        if(quiet == 0) printf("\n");
         usleep(1000*timefreq);
     }
 
diff --git a/obsdfreqd.1 b/obsdfreqd.1
index 7119330..87fe596 100644
--- a/obsdfreqd.1
+++ b/obsdfreqd.1
@@ -6,7 +6,7 @@
 .Nd manage the CPU frequency on OpenBSD from userland
 .Sh SYNOPSIS
 .Nm
-.Op Fl q
+.Op Fl v
 .Op Fl h
 .Op Fl d Ar downstepfrequency
 .Op Fl i Ar inertia
@@ -28,8 +28,8 @@ Arguments can be comma separated to provide different values for when on battery
 if so, the first value is used when power plug is connected and second value
 when on battery.
 .Bl -tag -width
-.It Op Fl q
-Suppress standard output display.
+.It Op Fl v
+Enable verbose output in CSV format.
 .It Op Fl h
 Display usage
 .It Op Fl d Ar downstepfrequency