docs: update esp32 wifi settings docs

README.md

@@ -36,23 +36,23 @@ form a single WS2812 chain.  There are 83 LEDs in the current version, so a tota
 The ESP32-C3 needs to be soldered to the first PCB.
 
 > :warning: **There is a small issue with V1.0 of the PCB!** (Please check the version number on the silk screen!):
+> 
 > Pins 1 and 4 of the OUT pin header are swapped - this can be easily worked around by swapping wires number 1 and 4 in the JST connector plugged into this header.
 
 ### esp32/
 
 The PlatformIO Arduino project for the ESP32.  It perfoms the following tasks:
-- Connect to the WiFi network defined at compile time
+
+- If no WiFi AP has been configured yet, it starts an AP on its own
+    - Connect to the AP (SSID: `spaceapimap`, PSK: `12345678`)
+	- Configure the WiFi network the ESP32 should connect to
+- Connect to the WiFi network defined previously
 - Obtain the current time through NTP
-- Fetch the aggregated SpaceAPI responses from api.spaceapi.io and parse the JSON response
+- Fetch the aggregated SpaceAPI responses from `api.spaceapi.io` and parse the JSON response
 - Update the WS2812 LEDs
 
-Compile and upload to the ESP32 using PlatformIO:
-
-```bash
-export ESP32_WPA2_SSID=the-wifi-ssid
-export ESP32_WPA2_PSK=the-wifi-psk
-pio run -t upload
-```
+The list of SpaceAPI endpoints to display is defined in `esp32/src/spacemap.h`.
+The position of an endpoint in the `spaces` array corresponds to the index of the WS2812 LED it controls.
 
 ### led_plugging_tool/