diff --git a/src/hal/ttgov2.h b/src/hal/ttgov2.h
index 8787feee..240b687d 100644
--- a/src/hal/ttgov2.h
+++ b/src/hal/ttgov2.h
@@ -28,26 +28,29 @@
 #define OLED_SDA GPIO_NUM_21  // ESP32 GPIO21 -- SD1306 D1+D2
 #define OLED_SCL GPIO_NUM_22 // ESP32 GPIO22 -- SD1306 D0
 
+/* source:
+https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-2/11973
 
-/*
- ESP32             LoRa module (SPI)        OLED display (I2C)
-   ---------         -----------------        ------------------
-    5  SCK           SCK
-   27  MOSI          MOSI
-   19  MISO          MISO
-   18  SS            NSS
-   14                RST
-   26                DIO0
-   33                DIO1  (see note {1})
-   32                DIO2  (see note {2})
-   22  SCL                                    SCL
-   21  SDA                                    SDA
-   22  LED  (useless, see note {3})
+TTGO LoRa32 V2:
+ESP32          LoRa (SPI)      Display (I2C)  LED
+-----------    ----------      -------------  ------------------
+GPIO5  SCK     SCK
+GPIO27 MOSI    MOSI
+GPIO19 MISO    MISO
+GPIO18 SS      NSS
+EN     RST     RST
+GPIO26         DIO0
+GPIO33         DIO1 (see #1)
+GPIO32         DIO2 (see #2)
+GPIO22 SCL                     SCL
+GPIO21 SDA                     SDA
+GPIO22                                        useless (see #3)
 
-   {1} Must be wired externally!
-       DIO1 is connected to a separate pin on pcb, but is not connected to GPIO33.
-       Solder a wire from pcb pin labeled "LORA_IRQ" to pin "GPIO33" (see TTGO V2.0 pinout).
-   {2} Is not wired, but not needed for LoRa.
-   {3} The on-board LED is wired to SCL (used by display) therefore totally useless!
-   */
+#1 Required (used by LMIC for LoRa).
+Not on-board wired to any GPIO. Must be manually wired. <<-- necessary for paxcounter
 
+#2 Optional (used by LMIC for FSK but not for LoRa). <<-- NOT necessary for paxcounter
+Not on-board wired to any GPIO. When needed: must be manually wired.
+
+#3 GPIO22 is already used for SCL therefore LED cannot be used without conflicting with I2C and display.
+*/ 
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