📝 Update TINA2 docs (#1008)

config/examples/Weedo/Tina2/README.md

@@ -1,28 +1,56 @@
 ## Product version
 
-- TINA2 WIFI: TINA2 standard version with ESP32 WIFI module installed. Support remote control, send files via wifi, and online 3d model library.
-- TINA2 BASIC: TINA2 lite version, without WIFI module and protective shell.
+There are several versions of the Weedo TINA2 with different hardware.
+
+### TINA2 WIFI / TINA2 BASIC
+- Outdated older models.
+- Called V2/V3 hardware by the manufacturer (Weedo / Weefun / Entina?).
+- The TINA2 WIFI is the standard TINA2 with ESP32 WIFI module installed. Supports remote control, sending files via WiFi, and online 3D model library.
+- The TINA2 BASIC is the lite version of the TINA2 with no WiFi module or protective shell.
+- Uses motherboard R62A/R62AS with ATMEGA2560 MCU.
+- Firmware files are 8-bit, identified by the "`.hex`" extension.
+- [Official TINA2firmware repo](https://github.com/weedo3d/TINA2firmware)
+
+### TINA2 UPGRADE
+- V7 hardware.
+- Current "basic" model. Sometimes called TINA2 or TINA2 BASIC, which adds to the confusion.
+- Uses motherboard R72A/R72B with a GD32F103RET6 MCU.
+- Firmware files are 32-bit, identified by the "`.bin`" or "`.wfm`" extension (proprietary format). These firmware files are NOT compatible with the older ATMEGA2560-based models, or vice versa. If your firmware update fails, it may be due to this mismatch.
+- [Official Tina2Upgradefirmware repo](https://github.com/weedo3d/Tina2Upgradefirmware)
+
+### TINA2S
+- Current "WiFi" model. Compared to the base TINA2 UPGRADE model, adds WiFi and a heated bed.
+- Uses motherboard R72H/R72P with a GD32F103RET6 MCU.
+- [Official TINA2Sfirmware repo](https://github.com/weedo3d/TINA2Sfirmware)
 
 > [!NOTE]
-> The Monorprice cadet printer is a rebranded version of these printers and the provided configuration should work.
+> The "Monoprice Cadet" is a rebranded version of the V2/V3. The provided configuration should work.
 
-## Hardware version
+## Hardware identification
 
-- V2: The motherboard version is 62AS. The endstop type is lever limit switch.
-- V3: The motherboard version is 62AS. The endstop type is mushroom head limit switch.
+- V2: Motherboard version 62AS. The endstop is a lever limit switch.
+- V3: Motherboard version 62AS. The endstop is a mushroom head limit switch.
+- V7: Motherboard version R72*. The endstop is a mushroom head limit switch.
 
-## Adding wifi support using ESP3D
+## Adding WiFi support using ESP3D
 
-You can add wifi support using [ESP3D](https://github.com/luc-github/ESP3D).
+You can add WiFi support using [ESP3D](https://github.com/luc-github/ESP3D).
 Basically connect your own NodeMCU to second serial port of the MCU.
-See ESP3D wiki for connection diagram.
+See the [ESP3D wiki](http://esp3d.io/esp3d/) for connection diagrams.
 
-In Marlin configuration.h set:
-`#define SERIAL_PORT_2 3`
+In `Configuration.h` set:
+```c
+#define SERIAL_PORT_2 3
+```
 
-## Manufacturer wifi support
+## Manufacturer WiFi support
 
-Examples provided here have not been tested with wifi board from manufacturer.
-Setting `#define SERIAL_PORT_2 3` in Marlin configuration.h might be enough to work with manufacturer wifi board.
+The provided example configurations have not been tested with the WiFi board from the manufacturer.
+Setting `#define SERIAL_PORT_2 3` in `Configuration.h` might be enough to work with the manufacturer WiFi board.
 
-Feedback are welcome.
+Feedback is welcome.
+
+## Manufacturer USB support
+
+All printers use CH340/CH341 for USB. The driver is often included as part of official driver releases.
+[The latest version is also available from the chip manufacturer](https://www.wch.cn/download/CH341SER_EXE.html)