chore: Update README.md

Author: zfields

README.md

@@ -10,11 +10,28 @@
 ### What?
 The `ArduinoIoTCloud` library is the central element of the firmware enabling certain Arduino boards to connect to the [Arduino IoT Cloud](https://www.arduino.cc/en/IoT/HomePage). The following boards are supported:
 
-* **WiFi**: [`MKR 1000`](https://store.arduino.cc/arduino-mkr1000-wifi), [`MKR WiFi 1010`](https://store.arduino.cc/arduino-mkr-wifi-1010), [`Nano 33 IoT`](https://store.arduino.cc/arduino-nano-33-iot), [`Portenta H7`](https://store.arduino.cc/portenta-h7), [`Nano RP2040 Connect`](https://store.arduino.cc/products/arduino-nano-rp2040-connect), [`Nicla Vision`](https://store.arduino.cc/products/nicla-vision), [`OPTA WiFi`](https://store.arduino.cc/products/opta-wifi), [`GIGA R1 WiFi`](https://store.arduino.cc/products/giga-r1-wifi), [`Portenta C33`](https://store.arduino.cc/products/portenta-c33), [`UNO R4 WiFi`](https://store.arduino.cc/products/uno-r4-wifi), [`Nano ESP32`](https://store.arduino.cc/products/nano-esp32), [`ESP8266`](https://github.com/esp8266/Arduino/releases/tag/2.5.0), [`ESP32`](https://github.com/espressif/arduino-esp32/releases/tag/2.0.5)
-* **GSM**: [`MKR GSM 1400`](https://store.arduino.cc/arduino-mkr-gsm-1400-1415)
+* **Wi-Fi**: [`MKR 1000`](https://store.arduino.cc/arduino-mkr1000-wifi), [`MKR WiFi 1010`](https://store.arduino.cc/arduino-mkr-wifi-1010), [`Nano 33 IoT`](https://store.arduino.cc/arduino-nano-33-iot), [`Portenta H7`](https://store.arduino.cc/portenta-h7), [`Nano RP2040 Connect`](https://store.arduino.cc/products/arduino-nano-rp2040-connect), [`Nicla Vision`](https://store.arduino.cc/products/nicla-vision), [`OPTA WiFi`](https://store.arduino.cc/products/opta-wifi), [`GIGA R1 WiFi`](https://store.arduino.cc/products/giga-r1-wifi), [`Portenta C33`](https://store.arduino.cc/products/portenta-c33), [`UNO R4 WiFi`](https://store.arduino.cc/products/uno-r4-wifi), [`Nano ESP32`](https://store.arduino.cc/products/nano-esp32), [`ESP8266`](https://github.com/esp8266/Arduino/releases/tag/2.5.0), [`ESP32`](https://github.com/espressif/arduino-esp32/releases/tag/2.0.5), [`Notecard`](https://shop.blues.com/collections/notecard)
+* **GSM**: [`MKR GSM 1400`](https://store.arduino.cc/arduino-mkr-gsm-1400-1415), [`Notecard`](https://shop.blues.com/collections/notecard)
+* **LTE**: [`Notecard`](https://shop.blues.com/collections/notecard)
 * **5G**: [`MKR NB 1500`](https://store.arduino.cc/arduino-mkr-nb-1500-1413)
-* **LoRa**: [`MKR WAN 1300/1310`](https://store.arduino.cc/mkr-wan-1310)
+* **LoRa**: [`MKR WAN 1300/1310`](https://store.arduino.cc/mkr-wan-1310), [`Notecard`](https://shop.blues.com/collections/notecard)
 * **Ethernet**: [`Portenta H7`](https://store.arduino.cc/products/portenta-h7) + [`Vision Shield Ethernet`](https://store.arduino.cc/products/arduino-portenta-vision-shield-ethernet), [`Max Carrier`](https://store.arduino.cc/products/portenta-max-carrier), [`Breakout`](https://store.arduino.cc/products/arduino-portenta-breakout), [`Portenta Machine Control`](https://store.arduino.cc/products/arduino-portenta-machine-control), [`OPTA WiFi`](https://store.arduino.cc/products/opta-wifi), [`OPTA RS485`](https://store.arduino.cc/products/opta-rs485), [`OPTA Lite`](https://store.arduino.cc/products/opta-lite), [`Portenta C33`](https://store.arduino.cc/products/portenta-c33) + [`Vision Shield Ethernet`](https://store.arduino.cc/products/arduino-portenta-vision-shield-ethernet)
+* **Satellite**: [`Notecard`](https://shop.blues.com/collections/notecard)
+
+#### More About Notecard Connectivity
+
+The Notecard is a wireless, secure abstraction for device connectivity, that can
+be used to enable _ANY*_ device with I2C, or UART, to connect to the Arduino IoT
+Cloud via cellular, LoRa, satellite or Wi-Fi (including the devices listed
+above)!
+
+As a result, the STM32 architecture has now been added to this library. If you
+have an STM32 device, you are now able to connect it to the Arduino IoT Cloud by
+using a Notecard to provide a secure communication channel.
+
+> \*_Unfortunately, the AVR architecture is not supported by the Arduino IoT
+> Cloud library. Therefore, those devices are ineligible for use with the
+> Notecard._
 
 ### How?
 1) Register your Arduino IoT Cloud capable board via [Arduino IoT Cloud](https://create.arduino.cc/iot) (Devices Section).