diff --git a/README.md b/README.md
index 1d884c4..d89c8b4 100644
--- a/README.md
+++ b/README.md
@@ -18,19 +18,20 @@ higher concentrations of CO2 inside will make you sleepy and have an impact on y
 
 ## build
 
-just solder everything according to the connection schema.
-get yourself a copy of esphome (https://esphome.io/) and compile the firmware with 'co2ampel=USER_ROOMesphome co2sensor.yaml run' (replace user with a nick that identifies you or your organisation and room with the place the sensor is located at - these will be used for online graphing!)
-hold boot on your esp32 until fw upload starts.
+* solder everything according to the connection schema
+* get yourself a copy of esphome (https://esphome.io/)
+* compile the firmware with ```co2ampel=USER_ROOMesphome co2sensor.yaml run``` (replace user with a nick that identifies you or your organisation and room with the place the sensor is located at - these will be used for online graphing!)
+* hold boot on your esp32 until fw upload starts.
 
 ## setup
-place the sensor in your room, keep it away from direct exposure of breath (give it at least 1-2m distance to humans or other co2 sources to get the average co2 level of the room)
-when there is a freifunk wifi around there is nothing to do for you, same when you defined your own wifi via secrets.yaml.
-else just wait a bit and the sensor will spawn an wifi without a password. connect with your phone and choose to login or open http://192.168.4.1 in a browser to enter your wifi credentials
-when everything is done, the default config will send the sensor readings back to the project where you can view online graphs (see grafana)
+* place the sensor in your room, keep it away from direct exposure of breath (give it at least 1-2m distance to humans or other co2 sources to get the average co2 level of the room)
+* when there is a freifunk wifi around there is nothing to do for you, same when you defined your own wifi via secrets.yaml.
+* else just wait a bit and the sensor will spawn an wifi without a password. connect with your phone and choose to login or open http://192.168.4.1 in a browser to enter your wifi credentials
+* when everything is done, the default config will send the sensor readings back to the project where you can view online graphs (see grafana)
 
 ## grafana
 
-there is a quick setup on http://co2.cyber23.de:3000/d/1axlpIdGk/co2?orgId=1&refresh=10s your sensor should apper in the list as soon it has wifi
+there is a quick setup on http://co2.cyber23.de:3000/d/1axlpIdGk/co2?orgId=1&refresh=10s your sensor should apper in the list on the left as soon it is connected via wifi
 
 ### schema
 
@@ -69,13 +70,13 @@ either way it might be a good idea to have a capacitor between VCC and GND. my p
 | 400 ppm     | none   | no     | more or less the baseline of the sensor hardware and means 'fresh air quality'    |
 | 400-800ppm  | none   | no     | safe zone and can be considered good air quality                                  |
 | 800-1500ppm | yellow | no     | warning zone (consider to open windows) and is between medium and bad air quality |
-| > 1500ppm   | red    | yes       | bad air quality, ppl in the room will be affected in a negative way               |
+| > 1500ppm   | red + blink    | no       | bad air quality, ppl in the room will be affected in a negative way               |
 
  
 
 
 ## todo
- * cooldown time for buzzer (alarm only once every n minutes) -> lambda/interval/on_time?
- * add openings for mh-z19 to the case
- * adjust light tunnel to use frosted acrylic glass
- * add a silent switch for meeting rooms and such (no buzzer, but flash at a regular interval to attract attention)
+- [ ]  cooldown time for buzzer (alarm only once every n minutes) -> lambda/interval/on_time?
+- [x]  add openings for mh-z19 to the case
+- [x]  adjust light tunnel to use frosted acrylic glass
+- [ ]  add a silent switch for meeting rooms and such (no buzzer, but flash at a regular interval to attract attention)