Merge branch 'master' into dev

src/mesh/RadioInterface.cpp

@@ -106,7 +106,7 @@ bool RadioInterface::init()
  * djb2 by Dan Bernstein.
  * http://www.cse.yorku.ca/~oz/hash.html
  */
-unsigned long hash(char *str)
+unsigned long hash(const char *str)
 {
     unsigned long hash = 5381;
     int c;
@@ -117,8 +117,6 @@ unsigned long hash(char *str)
     return hash;
 }
 
-#define POWER_DEFAULT 17
-
 /**
  * Pull our channel settings etc... from protobufs to the dumb interface settings
  */
@@ -128,8 +126,6 @@ void RadioInterface::applyModemConfig()
     // No Sync Words in LORA mode
 
     power = channelSettings.tx_power;
-    if (power == 0)
-        power = POWER_DEFAULT;
 
     // If user has manually specified a channel num, then use that, otherwise generate one by hashing the name
     int channel_num = (channelSettings.channel_num ? channelSettings.channel_num - 1 : hash(channelSettings.name)) % NUM_CHANNELS;
@@ -139,6 +135,25 @@ void RadioInterface::applyModemConfig()
               power);
 }
 
+/**
+ * Some regulatory regions limit xmit power.
+ * This function should be called by subclasses after setting their desired power.  It might lower it
+ */
+void RadioInterface::limitPower()
+{
+    uint8_t maxPower = 255; // No limit
+
+#ifdef HW_VERSION_JP
+    maxPower = 13; // See https://github.com/meshtastic/Meshtastic-device/issues/346
+#endif
+    if (power > maxPower) {
+        DEBUG_MSG("Lowering transmit power because of regulatory limits\n");
+        power = maxPower;
+    }
+
+    DEBUG_MSG("Set radio: final power level=%d\n", power);
+}
+
 ErrorCode SimRadio::send(MeshPacket *p)
 {
     DEBUG_MSG("SimRadio.send\n");