begin deep sleep support for nrf52

src/mesh/SX1262Interface.cpp

@@ -201,9 +201,20 @@ bool SX1262Interface::isActivelyReceiving()
 
 bool SX1262Interface::sleep()
 {
+    DEBUG_MSG("sx1262 entering sleep mode\n");
+    setStandby(); // Stop any pending operations
+
+    // turn off TCXO if it was powered
+    // FIXME - this isn't correct
+    // lora.setTCXO(0);
+
     // put chipset into sleep mode
     disableInterrupt();
-    lora.sleep();
+    lora.sleep(false); // Note: we do not keep the config, full reinit will be needed
+
+#ifdef SX1262_POWER_EN
+    digitalWrite(SX1262_POWER_EN, LOW);
+#endif
 
     return true;
 }