STM32: Migrate variants to new structure (#7389)

variants/stm32/wio-e5/platformio.ini

@@ -0,0 +1,24 @@
+[env:wio-e5]
+extends = stm32_base
+board = lora_e5_dev_board
+board_upload.maximum_size = 233472 ; reserve the last 28KB for filesystem
+build_flags =
+  ${stm32_base.build_flags}
+  -Ivariants/stm32/wio-e5
+  -DSERIAL_UART_INSTANCE=1
+  -DPIN_SERIAL_RX=PB7
+  -DPIN_SERIAL_TX=PB6
+  -DPIN_WIRE_SDA=PA15
+  -DPIN_WIRE_SCL=PB15
+  -DHAS_SENSOR=1
+  -DENABLE_HWSERIAL2
+  -DPIN_SERIAL2_TX=PA2
+  -DPIN_SERIAL2_RX=PA3
+  -DHAS_GPS=1
+  -DGPS_SERIAL_PORT=Serial2
+
+upload_port = stlink
+
+lib_deps =
+  ${stm32_base.lib_deps}
+  # Add your custom sensor here!

variants/stm32/wio-e5/variant.h

@@ -0,0 +1,27 @@
+/*
+Wio-E5 mini (formerly LoRa-E5 mini)
+https://www.seeedstudio.com/LoRa-E5-mini-STM32WLE5JC-p-4869.html
+https://www.seeedstudio.com/LoRa-E5-Wireless-Module-p-4745.html
+*/
+
+/*
+This variant is a work in progress.
+Do not expect a working Meshtastic device with this target.
+*/
+
+#ifndef _VARIANT_WIOE5_
+#define _VARIANT_WIOE5_
+
+#define USE_STM32WLx
+
+#define LED_PIN PB5
+#define LED_STATE_ON 1
+
+#define WIO_E5
+
+#if (defined(LED_BUILTIN) && LED_BUILTIN == PNUM_NOT_DEFINED)
+#undef LED_BUILTIN
+#define LED_BUILTIN (LED_PIN)
+#endif
+
+#endif