Merge branch 'dev'

# Conflicts:
#	docs/payloads.md

variants/thinknode_m9/ThinkNodeM9Board.cpp

@@ -0,0 +1,23 @@
+#include "ThinkNodeM9Board.h"
+
+void ThinkNodeM9Board::begin() {
+
+  // power on screen
+  pinMode(VEXT_ENABLE, OUTPUT);
+  digitalWrite(VEXT_ENABLE, VEXT_ON_VALUE);
+
+  ESP32Board::begin();
+
+}
+
+void ThinkNodeM9Board::powerOff()  {
+  enterDeepSleep(0);
+}
+
+uint32_t ThinkNodeM9Board::getIRQGpio() {
+  return LORA_DIO0;
+}
+
+const char* ThinkNodeM9Board::getManufacturerName() const {
+  return "Elecrow ThinkNode M9";
+}