add RAK and small edits to hardware section

website/docs/hardware/rak4631.md

@@ -0,0 +1,29 @@
+---
+id: wisBlock-hardware
+title: Wisblock RAK4631
+sidebar_label: WisBlock
+---
+
+There is currently fledgling support for the WisBlock RAK4631 module. The WisBlock ecosystem allows for an expansion of sensor, display and I/O devices.
+
+* nRF52840 - Bluetooth BLE 5.0 and very low power consumption
+* SX1262 - LoRa transceiver
+* Frequency options:
+    * 433 Mhz
+    * 470 Mhz
+    * 799 Mhz
+    * 865 Mhz
+    * 868 Mhz
+    * 915 Mhz
+    * 920 Mhz
+    * 923 Mhz
+* Optional GPS
+* U.FL antenna connector
+* Optional switches
+* Optional screen
+
+
+* Firmware file: `firmware-rak4631-1.x.x.uf2`
+* [Purchase Link](https://docs.rakwireless.com/Product-Categories/WisBlock/RAK4631/Overview)
+
+![RAK4631 Core Module](/img/hardware/rak4631.png)

website/docs/hardware/tbeam.md

@@ -88,7 +88,7 @@ sidebar_label: LILYGO® T-Beam
 ## T-Beam - M8N & SX1262
 
 * ESP32 - Wifi & Bluetooth
-* SX1272 - LoRa Transceiver - improved performance
+* SX1262 - LoRa Transceiver - improved performance
 * Frequency options:
     * 433 MHz
     * 868 MHz 

website/docs/hardware/techo.md

@@ -6,6 +6,16 @@ sidebar_label: LILYGO® T-Echo
 
 The T-Echo has been in development by LILYGO® over the past few months and appears to be nearing release. Once it is released we will update this page with more information.
 
+* nRF52840 - Bluetooth BLE 5.0 and very low power consumption
+* SX1262 - LoRa transceiver
+* 1.54" eInk display
+* Air530 - GPS receiver - Fast locking
+* Two buttons
+* RTC
+
+
+* firmware file: `firmware-t-echo-1.x.x.uf2`
+
 <img alt="LILYGO T-Echo" src="/img/hardware/t-echo.png" style={{zoom: '15%'}} />
 
 See this [recent tweet](https://twitter.com/lilygo9/status/1383323118756712457) from LILYGO® showing the function of the T-Echo.