resistance calibration

docs/manual.md

@@ -195,6 +195,7 @@ The output sections show the state of the outputs and the possibility to control
 **Dimmer Control:**
 
 - `Dimmer Automatic Control`: ON/OFF switch to select automatic routing mode or manual control of the dimmer.
+  Resistance calibration step is required before using automatic mode.
 - `Dimmer Level` / `Dimmer Level Manual Control`: Slider to control the dimmer level manually. Only available when the dimmer is not in automatic mode. Otherwise the dimmer level is displayed.
 - `Grid Excess Reserved`: Only available in automatic mode. Allows to share the remaining grid excess to the second output.
   For example, if output 1 is set to 50%, then output 1 will take at most 50% of the grid excess (eventually less if 50% of the grid excess exceeds the nominal power of the connected load). Output 2 will be dimmed with the remaining excess.
@@ -317,7 +318,7 @@ For a 2100W tri-phase resistance, 3% means 21W per relay because there is 3x 700
 ### MQTT as a Grid Source
 
 - `Grid Voltage from MQTT Topic`: if set to a MQTT Topic, the router will listen to it to read the Grid voltage.
-  **Any measurement device (JSY or PZEM) will still have priority over MQTT**.
+  **Any measurement device (JSY or JSY Remote) will still have priority over MQTT**.
 
 - `Grid Power from MQTT Topic`: if set to a MQTT Topic, the router will listen to it to read the Grid power.
   **It takes precedence over any other source, even a JSY connected to the ESP32**.
@@ -415,22 +416,22 @@ All these components are activated **live without the need to restart the router
 
 ### Resistance Calibration
 
-The router **needs to know the resistance value of the load**. There several ways to set it.
-
-1. **Measure yourself:** You can manually enter the resistance values in the `Hardware Config` page.
-   If you chose to do so, be careful to put a value that you have correctly measured!
-   An approximation will cause the router to not properly work because it won't be able to adjust the exact amount of power to send.
+The router **needs to know the resistance value of the load**.
 
 - `Output 1 Resistance`: the resistance value in Ohm of the load connected to Output 1
 - `Output 2 Resistance`: the resistance value in Ohm of the load connected to Output 2
 
+Be careful to put a value that you have correctly measured!
+An approximation will cause the router to not properly work because it won't be able to adjust the exact amount of power to send.
+
+If you have one of these device attached, they can help you.
+You can set the dimmer in manual mode and set it to 50% and 100% and read the resistance values.
+Then you just have to report it in the `Hardware Config` page.
+
 2. **PZEM-004T v3:** If you have wired a PZEM-004T v3 connected to each output, it will measure the resistance value when routing.
-   In this case, **you do not have to enter any value**, leave the fields to 0.
-   The PZEM will measure the resistance value while routing.
 
-3. **JSY-MK-194T:** If you have a JSY-MK-194T, you can manually activate the dimmer one by one to 100% and wait about 5 seconds for the values to stabilize.
+3. **JSY-MK-194T:** If you have a JSY-MK-194T, you can activate the dimmer one by one to 100% and wait for the values to stabilize.
    The router will then display the resistance value in the `Overview` page, thanks to the JSY.
-   You just have to report it in the `Hardware Config` page.
 
 ## Dashboard / Statistics