diff --git a/src/hm/hmRadio.h b/src/hm/hmRadio.h
index 789b80d5..18d9fb09 100644
--- a/src/hm/hmRadio.h
+++ b/src/hm/hmRadio.h
@@ -205,6 +205,7 @@ class HmRadio {
                 }
                 cnt++;
             }
+
             sendPacket(invId, cnt, isRetransmit, isNoMI);
         }
 
@@ -239,6 +240,17 @@ class HmRadio {
             return mNrf24.isPVariant();
         }
 
+        /* Test whether a signal (carrier or otherwise) greater than or equal to -64dBm is present on the channel.
+         Valid only on nRF24L01P (+) hardware. On nRF24L01, use testCarrier().
+         Useful to check for interference on the current channel and channel hopping strategies.
+         bool goodSignal = radio.testRPD();
+         if(radio.available()){ Serial.println(goodSignal ? "Strong signal > 64dBm" : "Weak signal < 64dBm" ); radio.read(0,0); } */
+        bool goodSignal(void) {
+            bool goodSignal = mNrf24.testRPD();
+            mNrf24.read(0,0);
+            return goodSignal;
+        }
+
         std::queue<packet_t> mBufCtrl;
 
         uint32_t mSendCnt;
diff --git a/src/web/RestApi.h b/src/web/RestApi.h
index 270cb372..cb147a07 100644
--- a/src/web/RestApi.h
+++ b/src/web/RestApi.h
@@ -502,6 +502,7 @@ class RestApi {
             obj[F("isconnected")] = mRadio->isChipConnected();
             obj[F("DataRate")] = mRadio->getDataRate();
             obj[F("isPVariant")] = mRadio->isPVariant();
+            obj[F("goodSignal")] = mRadio->goodSignal();
             obj[F("en")]         = (bool) mConfig->nrf.enabled;
         }
 
@@ -570,6 +571,8 @@ class RestApi {
                 warn.add(F("reboot your ESP to apply all your configuration changes"));
             if(0 == mApp->getTimestamp())
                 warn.add(F("time not set. No communication to inverter possible"));
+
+
             /*if(0 == mSys->getNumInverters())
                 warn.add(F("no inverter configured"));*/
 
diff --git a/src/web/html/setup.html b/src/web/html/setup.html
index 94c3d461..3f8a6c64 100644
--- a/src/web/html/setup.html
+++ b/src/web/html/setup.html
@@ -778,10 +778,10 @@
                         ml("div", {class: "col-12 col-sm-3 my-2"}, "Power Level"),
                         ml("div", {class: "col-12 col-sm-9"},
                             sel("rf24Power", [
-                                [0, "MIN"],
+                                [0, "MIN (recommended)"],
                                 [1, "LOW"],
                                 [2, "HIGH"],
-                                [3, "MAX"]
+                                [3, "MAX (experimental)"]
                             ], obj["power_level"])
                         )
                     ])
diff --git a/src/web/html/system.html b/src/web/html/system.html
index 0f1df319..4ab63931 100644
--- a/src/web/html/system.html
+++ b/src/web/html/system.html
@@ -50,7 +50,7 @@
             }
 
             function parseRadio(obj, stat) {
-                const pa = ["MIN", "LOW", "HIGH", "MAX"];
+                const pa = ["MIN (recommended)", "LOW", "HIGH", "MAX"];
                 const datarate = ["1 MBps", "2 MBps", "250 kbps"];
 
                 var main = document.getElementById("radio");
@@ -61,6 +61,7 @@
                 main.appendChild(h);
 
                 main.appendChild(genTabRow("nrf24l01" + (obj["isPVariant"] ? "+ " : ""), (obj["isconnected"] ? "is connected " : "is not connected ")));
+                main.appendChild(genTabRow("NRF Signal: ",                               (obj["goodSignal"] ? "Strong signal > 64dBm" : "Weak signal < 64dBm")));
 
                 if(obj["isconnected"]) {
                     main.appendChild(genTabRow("Datarate", datarate[obj["DataRate"]]));